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Multiphase Co/Ni metal nitrides with heterointerfaces for enhanced interfacial polarization loss in electromagnetic wave absorption 认领 引用 被引量：11
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作者 Zhiqiang Guo Junwen Ren +6 位作者 Xianzhen Xu Di Lan Siyuan Zhang Mukun He Zhenguo Gao Zirui Jia Guanglei Wu 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2025年第33期19-27,共9页
Metal nitrides exhibit excellent properties and application potential as electromagnetic wave(EMW)ab-sorbing materials.Their high conductivity and adjustable dielectric properties allow them to effectively attenuate E... Metal nitrides exhibit excellent properties and application potential as electromagnetic wave(EMW)ab-sorbing materials.Their high conductivity and adjustable dielectric properties allow them to effectively attenuate EMW.However,the current research on the synergistic effect of metal nitrides is scarce and has limited applications in the field of EMW absorption.In this work,Co/Ni metal-nitride fiber composites with multiphase structures were constructed by electrostatic spinning and multiphase composite process.The synergistic loss mechanism of multiphase structure and N atomic modulation is explored by modu-lating the components and microstructure of the materials.By constructing the multiphase composites,the controllable tuning of non-homogeneous interfaces and the enhanced interfacial polarization loss ef-fect were achieved.Electrochemical impedance spectroscopy was used to analyze the charge transfer ca-pability at the interface of multiphase Co/Ni metal nitride fiber composites.Through the controllable reg-ulation of the multiphase structure,the Co/Ni bimetallic nitride fiber composite(Co5.47N/Ni4N/CF)exhib-ited the strongest polarization loss capability,achieving a minimum reflection loss(RLmin)of−43.82 dB and a maximum effective absorption bandwidth(EABmax)of 7.04 GHz.This study provides a valuable reference for multiphase composites in the field of EMW absorption by exploring the polarization loss mechanism of Co/Ni metal nitride multiphase materials. 展开更多
关键词 Multiphase composite Heterogeneous interface Polarization loss Electromagnetic wave absorption
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Enhancing dipole polarization loss in conjugated metal-organic frameworks via coordination symmetry breaking under electromagnetic field 认领 引用 被引量：6
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作者 Weize Wang Rong Liu +10 位作者 Jiaqi Tao Tinglei Yu Yijie Liu Lvtong Duan Zifu Zhang Zhihao He Shuang Chen Jintang Zhou Ping Chen Peijiang Liu Zhengjun Yao 《Advanced Powder Materials》 EI CAS CSCD 2025年第4期70-80,共11页
Modulating the dipole polarization loss in the single-atom region and establishing its direct relationship with the electromagnetic wave absorption(EWA)performance remain an unmet challenge.Here,a dual-ligand modulati... Modulating the dipole polarization loss in the single-atom region and establishing its direct relationship with the electromagnetic wave absorption(EWA)performance remain an unmet challenge.Here,a dual-ligand modulation strategy,i.e.,partially changing coordination atoms in the single-metal region(sMr),is introduced to effectively break the coordination symmetry of conjugated metal-organic frameworks(cMOFs),finally enhancing EWA property of cMOFs materials.Further,the asymmetrical sMr is experimentally found to elicit the dipole polarization loss,overcoming the handicaps of other electromagnetic wave loss mechanisms,which directly contribution to enhance EWA performance of this series of cMOFs.This strategy is further confirmed by replacing metal centers.Among studied series of cMOFs,Cu2.25/Co0.75(HHTP1.67HITP0.33)achieves excellent EWA performance with an effective absorption bandwidth of 5.00 GHz and a reflection loss of66.03 dB.We introduce a dual-ligand modulation strategy targeting single-metal regions within cMOFs here,aiming to achieve superior EWA performance through atomic-scale dipole polarization loss modulation.We hope our study can inspire more exploration to realize high-performance EWA materials. 展开更多
关键词 Asymmetric structure Single-metal region Dipole polarization loss Electromagnetic wave absorption materials Conjugated metal-organic frameworks
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Simultaneous optimization of conduction and polarization losses in CNT@NiCo compounds for superior electromagnetic wave absorption 认领 引用 被引量：12
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作者 Yongpeng Zhao Zhicheng Lin +14 位作者 Li Huang Zitong Meng Hao Yu Xin Kou Zhiyong Zou Peng Huang Yuchao Wang Ding Xi Pengfei Yin Gehong Su Zhiqiang Fan Zhiping Su Dongbei Xu Lujun Pan Lijia Xu 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2023年第35期34-46,共13页
Polarization and conduction losses are the two most crucial dielectric loss mechanisms for carbon-based composites,but their synergistic effects in different frequency bands need to be further revealed.More importantl... Polarization and conduction losses are the two most crucial dielectric loss mechanisms for carbon-based composites,but their synergistic effects in different frequency bands need to be further revealed.More importantly,for polarization and conduction losses,the strengthening of one party always comes at the expense of the other,which inevitably limits the overall performance of the absorbers.Herein,we have developed a composite of CNT and NiCo hybrid particles via a scalable wet chemical process and an-nealing method.Through the adjustment of the precursor and the annealing temperature,the conduction and polarization losses of the composite are optimized simultaneously.The optimized samples achieved the full absorption of the X and Ku bands under conditions of low filling rate and thin thickness.Further theoretical and experimental studies have revealed conduction loss and polarization loss laws at different frequency ranges.The synergistic effect of conductive loss and magnetic loss in the low-frequency region ensures that the sample exhibits high microwave dissipation performance.However,in the medium and high-frequency part,the magnetic loss can be almost ignored and the timely replenishment of polar-ization loss keeps the wave-absorbing performance at a high level.The excellent multi-band absorption characteristics make the as-obtained absorbers meet the needs of future applications. 展开更多
关键词 CNT@NiCo compounds Conduction loss Polarization loss Electromagnetic wave absorption
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Multiphase structures build heterogeneous interfaces to promote interface polarization loss electromagnetic waves 认领 引用 被引量：2
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作者 Zhiqiang Guo Yuhang Cheng +3 位作者 Di Lan Siyuan Zhang Zirui Jia Guanglei Wu 《Nano Research》 SCIE EI CSCD 2025年第9期1340-1348,共9页
In view of the current serious electromagnetic pollution problem,it is urgent to study efficient electromagnetic wave absorbing materials.The construction of multiphase inhomogeneous interfaces is an effective means,e... In view of the current serious electromagnetic pollution problem,it is urgent to study efficient electromagnetic wave absorbing materials.The construction of multiphase inhomogeneous interfaces is an effective means,especially for the fine design of multicomponent materials.In this study,multiphase composites with tunable heterogeneous interfaces were prepared by hydrothermal synthesis,carbon coating and high-temperature annealing processes.Multiple component composites constructed rich heterogeneous interfaces,which exhibited strong interfacial polarization effects and effectively improved the absorption efficiency of electromagnetic wave(EMW).The fine tuning of the heterogeneous interfaces is achieved through component adjustment,which enhances the charge carrier transport efficiency and the polarization loss capability.Ultimately,the multiphase VS2@C@WS2composites obtained excellent EMW absorption performance,with the minimum reflection loss and the maximum effective absorption bandwidth of-66.35 dB and 5.12 GHz,respectively.In this work,the controllable construction of heterogeneous interfaces is achieved through the tuning of components,which provides a valuable method for optimizing the polarization loss. 展开更多
关键词 multiphase structure heterogeneous interfaces polarization loss electromagnetic wave absorption
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Constructing core@shell SiO2@C-Au multicomponent nanocomposites to enhance conduction and polarization loss capabilities for microwave absorption and antimicrobial 认领 引用 被引量：2
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作者 Xiaofeng Gong Jing Dang +7 位作者 Junxiong Xiao Xihui Wang Tianming Jia Li Yao Jing-Liang Yang Xiaosi Qi Yunpeng Qu Wei Zhong 《Nano Research》 SCIE EI CSCD 2025年第9期1268-1279,共12页
Conduction and/or polarization loss play a key role in improving electromagnetic wave(EMW)absorption.In this work,a combined polymerization and high-heat treatment process was utilized to efficiently fabricate core@sh... Conduction and/or polarization loss play a key role in improving electromagnetic wave(EMW)absorption.In this work,a combined polymerization and high-heat treatment process was utilized to efficiently fabricate core@shell structure SiO2@C adopting SiO2nanospheres as a hard template.The acquired SiO2@C nanocomposites displayed unsatisfied EMW absorption performances with minimum reflection loss value of-34.92 dB at 6.35 mm,and effective absorption bandwidth value of 3.20 GHz at 4.83 mm,respectively.In order to further comprehensively boost its microwave absorption performances(MAPs),a facile self-assembly strategy was adopted to load Au nanoparticles on the outer surface of SiO2@C nanospheres,constructing core@shell SiO2@C-Au multicomponent nanocomposites(MCNCs).By regulating the volume of Au nanoparticles,different Au contents of SiO2@C-Au MCNCs could be selectively produced in high efficiencies.The obtained outcomes demonstrated that the SiO2@C-Au MCNCs presented improved properties including EMW attenuation,impedance matching,conduction loss and polarization loss with increasing the content of Au nanoparticles.Thanks to the introduction of conductive Au nanoparticles and excellent interfacial effects,the SiO2@C-Au MCNCs presented the greatly improved antimicrobial and EMW absorption performances including strong absorption,wide bandwidth and small thicknesses.Consequently,this finding offered a novel strategy to construct core@shell SiO2@C-Au MCNCs,which simultaneously boosted conduction and polarization loss capabilities for EMW absorption. 展开更多
关键词 SiO2@C-Au core@shell structure conduction and polarization loss microwave absorption antimicrobial
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Conductive MOFs with tailored polarization loss for broadband absorption at ultrathin thickness 认领 引用 被引量：1
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作者 Wenqian Zhang Juhua Luo +3 位作者 Jiahuan Shi Bingjie Han Xiangcheng Li Yu Xie 《Nano Research》 SCIE EI CSCD 2025年第12期1235-1246,共12页
Conductive metal-organic frameworks(MOFs)have emerged as promising electromagnetic wave absorption(EMWA)properties materials due to their tunable dielectric properties and straightforward synthesis.Nevertheless,achiev... Conductive metal-organic frameworks(MOFs)have emerged as promising electromagnetic wave absorption(EMWA)properties materials due to their tunable dielectric properties and straightforward synthesis.Nevertheless,achieving broad effective absorption bandwidth(EAB)at ultrathin thickness remains a significant challenge.Herein,a series of rod-haped bimetallic CuM-HHTP(M=Mn,Co,Ni,and Zn)were synthesized via a hydrothermal approach.Remarkably,all fabricated samples demonstrated wide EAB values at ultrathin thickness.The EAB performance was found to correlate positively with the electron transfer capability of metal ions,following the order:CuNi>CuCo>CuZn>CuMn.This trend can be attributed to subtle variations in charge carrier concentrations and dipole moment modifications induced by the coordination of heterogeneous metal ions to hydroxyl groups,which arise from the coordination tendency and bond strength of the heterobimetallic binding to the ligands.The EAB value of CuNi-HHTP reached up to 7.12 GHz(10.88–18.00 GHz)at a matching thickness of only 1.78 mm.The outstanding EMWA performance was originated from optimized impedance matching,synergistic dipole and defect polarization,interface polarization,and conductive loss.Additionally,radar crosssection simulation confirmed the material's practical applicability in EMWA.This study presents a novel strategy for designing high-performance bimetallic conductive MOFs absorbers with tailored electromagnetic properties. 展开更多
关键词 bimetallic conductive metal-organic frameworks(MOFs) electromagnetic wave absorption(EMWA) widebandwidth polarization loss
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Dual driving strategy from micro-polarization to macroscopic conductance:Tailoring optimized low-frequency and wide-band microwave absorption in high-entropy oxides 认领 引用 被引量：3
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作者 Yao Li Yongheng Jin +7 位作者 Hassan Raza Yuping Wang Qingkui Chen Xingjian Zou Zhengyang Ren Junjie Guo Guangping Zheng Junye Cheng 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2025年第32期110-121,共12页
Recently,the strategy of tuning the dielectric parameters of absorbers for their excellent electromag-netic wave absorption(EMA)performance has attracted much attention.Among those candidates used for EMA application,... Recently,the strategy of tuning the dielectric parameters of absorbers for their excellent electromag-netic wave absorption(EMA)performance has attracted much attention.Among those candidates used for EMA application,high-entropy oxides(HEOs)can be implemented with this strategy due to their rich composition modulability.In this work,a series of implementation approaches varying from elemental design to structural modulation are employed to modulate the dielectric parameters of HEOs,resulting in their excellent EMA performance.The addition of Ti element optimizes the dipole distribution at the microscopic scales,improving the dielectric polarization of the materials.Moreover,a composite mate-rial is constructed by physically blending HEO with acetylene black(ACET),which significantly improves the macroscopic conduction loss of the material.The optimization of the dielectric genes of HEO/ACET is achieved with the blending effect and excellent EMA performance could be obtained.Among them,HEO with 17.5%ACET addition exhibits dual-band absorption,while Ti-HEO containing Ti element exhibits not only low-frequency absorption with reflection loss(RL)up to-29.81 dB at C-band but broadband absorption over 6 GHz as well as an optimal RL value up to-52.31 dB.In addition to the development of innovative EMA materials,this study offers a new perspective on how the EMA characteristics can be effectively regulated. 展开更多
关键词 High-entropy oxides Dielectric gene Broadband absorption Polarization loss Conductive networks
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Construction of multiple heterogeneous interfaces induced by rGO-multimetallic LDH derivatives to improve dielectric loss for enhanced electromagnetic wave absorption 认领 引用
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作者 Yuan Guo Yuping Duan +4 位作者 Xiaoji Liu Yupeng Shi Zeng Fan Huifang Pang Lujun Pan 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2025年第34期288-297,共10页
The rational construction of lightweight composites with multiple heterogeneous interfaces represents an effective strategy for achieving efficient electromagnetic wave(EMW)absorption.However,the impact of multiple he... The rational construction of lightweight composites with multiple heterogeneous interfaces represents an effective strategy for achieving efficient electromagnetic wave(EMW)absorption.However,the impact of multiple heterogeneous interfaces on electromagnetic performance still needs further exploration.Herein,reduced graphene oxide(rGO)@Ni-FeCo layered hydroxide(LDH)derivatives with multiple heterostructures were synthesized by a series of processes including electrostatic self-assembly,freeze-drying and thermal annealing.The conductive network in rGO and the cavities inside LDH facilitate electron migration and effectively prolong the propagation path of EMW,thereby enhancing conductivity loss.The abundant heterogeneous interfaces between carbon components and metal nanoparticles induce interfacial polarization.In addition,the catalytic activity differences of different metal particles generate different dielectric electromagnetic interfaces,which further promote interfacial polarization.The natural and exchange resonance formed by magnetic particles under a magnetic field provides magnetic losses.Therefore,the successful construction of multiple heterogeneous interfaces effectively enhances the conductivity loss and polarization loss.With a thickness of only 1.4 mm,the composite achieves a minimum reflection loss of-51.8 dB and an effective absorption bandwidth of 4.5 GHz.This work provides an effective strategy for achieving thin thickness and efficient EMW absorption through precise structural design and multi-component construction of absorbers. 展开更多
关键词 Electromagnetic wave absorption Multiple heterogeneous interfaces Conductivity loss Polarization loss
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MOF-derived multi-interface carbon-based composites with enhanced polarization loss and efficient microwave absorption 认领 引用 被引量：2
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作者 Hongjiao Qu Peng Zheng +6 位作者 Tao Wang Xingyu Yu Junjie Pan Xiaoli Fan Tengfei Zhang Xin Sun Jianping He 《International Journal of Smart and Nano Materials》 SCIE EI 2022年第3期465-480,共16页
Metal-organic framework materials(MOFs)have been widely stu-died because of their adjustable composition and controllable structure in the field of microwave absorption(MA).Therein,Prussian blue analogs(PBA)have attra... Metal-organic framework materials(MOFs)have been widely stu-died because of their adjustable composition and controllable structure in the field of microwave absorption(MA).Therein,Prussian blue analogs(PBA)have attracted the attention of researchers with ultra-high metal content.However,the attenua-tion ability of microwave for PBA-based composites is still unsatis-factory up to now.Therefore,the NiFe/CoFe@C composites were prepared by carbonizing polymetallic PBA(NiCoFe PBA)materials in this work,and the influence of different metal alloy components on MA was explored by adjusting the ratio of metal ions(Ni2+/Co2+).Moreover,the NiFe/CoFe@C composites have rich interfaces and enhance the polarization loss due to the introduction of Ni and it has an optimal performance at 2.7 mm that is the reflection loss(RL)is−41.49 dB and an effective absorption bandwidth(EAB)is 7.12 GHz with 1/1(Ni2+/Co2+).The above data provides a research idea for obtaining light and efficient absorbers. 展开更多
关键词 Prussian blue analogs carbon-based composites metal alloy polarization loss microwave absorption
The construction of vacancy engineering by doping of sulfur-selenium anions for precisely regulating the electromagnetic wave absorption performances 认领 引用
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作者 Kunyao Cao Weiping Ye +4 位作者 Yue Zhang Tao Wen Tian Zheng Weidong Xue Rui Zhao 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2026年第1期214-224,共11页
Polarization loss is a kind of dielectric loss,which has equal importance as conductivity loss,but often has not attracted enough attention from researchers.How to precisely regulate the EMW absorption performance by ... Polarization loss is a kind of dielectric loss,which has equal importance as conductivity loss,but often has not attracted enough attention from researchers.How to precisely regulate the EMW absorption performance by adjusting the polarization loss is now scarce but urgently needed.Herein,an anion-dopedinduced vacancy engineering strategy is developed to promote polarization loss and thus enhance electromagnetic wave(EMW)absorption property.The S vacancy can be introduced in two different ways(hydrothermal and calcination)and it turns out that more S vacancies can be harvested by the calcination method.Moreover,it’s worth noting that the co-doping of Se and S can further promote vacancy formation and thus enhance the vacancy level.As a result,the fabricated c-CoNi2S4−xSex-rGO aerogel manifests distinguished EMW absorption performances with a strong reflection loss(RL)of−40.3 dB and a broad effective absorption bandwidth(EAB)of 7.04 GHz at the thickness of 2.5 mm with a low filling content of 5%.Such superior EMW absorption performance is attributed to the large number of vacancies formed by the co-doping of S and Se atoms,resulting in abundant dipolar polarization loss.In addition,the polarization loss and conduction loss of the materials are quantitatively analyzed and discussed,and the relationship between the vacancy level and the polarization loss is determined.This work not only demonstrates the importance of polarization loss but also illustrates the correlation between vacancies level and polarization loss,providing a vital guiding significance for accurately regulating the EMW absorption properties of materials. 展开更多
关键词 Electromagnetic wave absorption Polarization loss c-CoNi2S4−xSex-rGO aerogel Anion-doped-induced Vacancy engineering
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Design of dual-network structure based on coordination bonds and hydrogen bonds for high-performance multifunctional flexible gel absorbers 认领 引用
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作者 Xinyue Xie Zijing Li +3 位作者 Shusheng Wang Geng Chen Limin Zhang Hongjing Wu 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2026年第2期693-703,共11页
The emergence of precision electronic devices and wearable electronic products urgently requires high-performance multifunctional electromagnetic wave(EMW)absorbers to meet the applicability and versatility in various... The emergence of precision electronic devices and wearable electronic products urgently requires high-performance multifunctional electromagnetic wave(EMW)absorbers to meet the applicability and versatility in various applications.Herein,a dual-network(DN)gel was successfully prepared using acrylamide and sodium lignosulphonate as the basic units by simple chemical cross-linking and physical cross-linking methods.Specifically,the hydrogel forms two types of cross-linking networks through metal coordination and hydrogen bonding.Benefiting from the combined effects of dipole polarization and conductivity loss,the gel achieves an effective absorption bandwidth(EAB)of 6.74 GHz at a thickness of only 1.89 mm,demonstrating excellent EMW absorption performance.In addition,this unique structural configuration endows the EMW absorber with multifunctional features,such as remarkable tensile strength,good environmental compatibility,ultraviolet(UV)resistance,and excellent adhesion.Integrating multiple functional features into the EMW gels displays a broad application prospect in a variety of application scenarios.This research reveals the significance of DN structure design in the electromagnetic wave absorption(EWA)performance of gel-based materials,providing a substantial foundation for the multifunctional design of gel-based absorbers. 展开更多
关键词 electromagnetic wave absorbers dual-network structure polarization loss hydrogen bonds coordination bonds multifunc-tional characteristics
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Ultrafine Vacancy-Rich Nb2O5Semiconductors Confined in Carbon Nanosheets Boost Dielectric Polarization for High-Attenuation Microwave Absorption 认领 引用 被引量：11
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作者 Zhe Su Shan Yi +5 位作者 Wanyu Zhang Xiaxi Xu Yayun Zhang Shenghu Zhou Bo Niu Donghui Long 《Nano-Micro Letters》 SCIE EI CAS CSCD 2023年第10期478-493,共16页
The integration of nano-semiconductors into electromagnetic wave absorption materials is a highly desirable strategy for intensifying dielectric polarization loss;achieving high-attenuation microwave absorption and re... The integration of nano-semiconductors into electromagnetic wave absorption materials is a highly desirable strategy for intensifying dielectric polarization loss;achieving high-attenuation microwave absorption and realizing in-depth comprehension of dielectric loss mechanisms remain challenges.Herein,ultrafine oxygen vacancy-rich Nb2O5semiconductors are confined in carbon nanosheets(ov-Nb2O5/CNS)to boost dielectric polarization and achieve high attenuation.The polarization relaxation,electromagnetic response,and impedance matching of the ov-Nb2O5/CNS are significantly facilitated by the Nb2O5semiconductors with rich oxygen vacancies,which consequently realizes an extremely high attenuation performance of-80.8 dB(>99.999999%wave absorption)at 2.76 mm.As a dielectric polarization center,abundant Nb2O5–carbon heterointerfaces can intensify interfacial polarization loss to strengthen dielectric polarization,and the presence of oxygen vacancies endows Nb2O5semiconductors with abundant charge separation sites to reinforce electric dipole polarization.Moreover,the three-dimensional reconstruction of the absorber using microcomputer tomography technology provides insight into the intensification of the unique lamellar morphology regarding multiple reflection and scattering dissipation characteristics.Additionally,ov-Nb2O5/CNS demonstrates excellent application potential by curing into a microwave-absorbing,machinable,and heat-dissipating plate.This work provides insight into the dielectric polarization loss mechanisms of nano-semiconductor/carbon composites and inspires the design of high-performance microwave absorption materials. 展开更多
关键词 Electromagnetic wave absorption Nb2O5semiconductor Dielectric polarization loss Oxygen vacancy Nb2O5-carbon hetero-interface
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Hierarchical engineering of CoNi@Air@C/SiO2@Polypyrrole multicomponent nanocubes to improve the dielectric loss capability and magnetic-dielectric synergy 认领 引用 被引量：16
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作者 Qiqin Liang Lei Wang +5 位作者 Xiaosi Qi Qiong Peng Xiu Gong Yanli Chen Ren Xie Wei Zhong 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2023年第16期37-46,共10页
Impedance matching characteristics and loss capabilities including magnetic loss,polarization loss and conduction loss are critical factors to improve microwave absorption performances(MAPs).To elevate these aspects,h... Impedance matching characteristics and loss capabilities including magnetic loss,polarization loss and conduction loss are critical factors to improve microwave absorption performances(MAPs).To elevate these aspects,herein,yolk-shell structured CoNi@Air@C/SiO2@Polypyrrole(PPy)magnetic multicomponent nanocubes(MCNCs)were designed and successfully fabricated in high efficiency through a continuous co-precipitation route,classical Stöber method,thermal treatment and polymerization reaction.The obtained results indicated that the formation of SiO2 effectively stabilized the cubic geometrical morphology and yolk-shell structure during the high-temperature pyrolysis process.The introduction of PPy greatly boosted their polarization loss and conductive loss capabilities.Therefore,the as-prepared yolkshell structured CoNi@Air@C/SiO2@PPy MCNCs presented superior MAPs compared to CoNi@Air@C/SiO2 MCNCs.Furthermore,by regulating the content of PPy,the obtained CoNi@Air@C/SiO2@PPy MCNCs displayed tunable and excellent comprehensive MAPs in terms of strong absorption capabilities,broad frequency bandwidths and thin matching thicknesses,which could be ascribed to the unique structure and excellent magnetic-dielectric synergistic effect.Therefore,our findings provided an alternative pathway to effectively utilize the magnetic-dielectric synergy and loss capabilities for the developing yolk-shell structured magnetic MCNCs as the strong wideband microwave absorbers. 展开更多
关键词 Yolk-shell structure CoNi@Air@C/SiO2@PPy Polarization and conductive loss Magnetic-dielectric synergy Microwave absorption
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Multidimensional construction of 1T-MoS2@graphene nanosheets nanocomposites for enhanced electromagnetic wave absorption 认领 引用 被引量：17
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作者 Jia Zhao Mukun He +3 位作者 Hua Guo Yali Zhang Hua Qiu Haoran Lai 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2025年第15期35-44,共10页
The preparation of electromagnetic(EM)wave absorption materials provided with the characteristics of thin matching thickness,broad bandwidth,and mighty absorption intensity is an efficient solution to current EM pollu... The preparation of electromagnetic(EM)wave absorption materials provided with the characteristics of thin matching thickness,broad bandwidth,and mighty absorption intensity is an efficient solution to current EM pollution.Herein,Graphene nanosheets(GN)were firstly fabricated via a facile high-energy ball milling method,subsequently high-purity 1T-MoS2 petals were uniformly anchored on the surface of GN to prepare 1T-MoS2@GN nanocomposites.Plentiful multiple reflection and scattering of EM waves in a distinctive multidimensional structure formed by GN and 1T-MoS2,copious polarization loss consisting of interfacial polarization loss and dipolar polarization loss severally derived from multitudinous heterointerfaces and profuse electric dipoles in 1T-MoS2@GN,and mighty conduction loss originated from plentiful induced current in 1T-MoS2@GN generated via the migration of massive electrons,all of which endowed 1T-MoS2@GN nanocomposites with exceptional EM wave absorption performances.The minimum reflection loss(RLmin)of 1T-MoS2@GN reached–50.14 dB at a thickness of only 2.10 mm,and the effective absorption bandwidth(EAB)was up to 6.72 GHz at an ultra-thin matching thickness of 1.84 mm.Moreover,the radar scattering cross section(RCS)reduction value of 36.18 dB m2 at 0°could be achieved as well,which ulteriorly validated the tremendous potential of 1T-MoS2@GN nanocomposites in practical applications. 展开更多
关键词 1T-MoS2@GN nanocomposites Conduction loss Polarization loss EM wave absorption
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Multi-interface engineering of FeS2/C/MoS2with core–shell structure for superior microwave absorption performance 认领 引用 被引量：7
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作者 Pan-Pan Zhou Cheng-Yao Hu +6 位作者 Shi-Lin Yuan Jian-Cheng Zhao Ya-Wei Kuang Han Gu Yu-Shen Liu Li-Xi Wang Qi-Tu Zhang 《Rare Metals》 SCIE EI CAS CSCD 2025年第6期4095-4106,共12页
Heterojunction and morphology control assume a significant part in adjusting the intrinsic electromagnetic properties of absorbers to acquire outstanding microwave absorption(MA)performance,but this still faces huge c... Heterojunction and morphology control assume a significant part in adjusting the intrinsic electromagnetic properties of absorbers to acquire outstanding microwave absorption(MA)performance,but this still faces huge challenges.Herein,FeS2/C/MoS2composite with core–shell structure was successfully designed and prepared via a multi-interface engineering.MoS2nanosheets with 1T and 2H phases are coated on the outside of FeS2/C to form a porous interconnected structure that can optimize the impedance matching characteristics and strengthen the interfacial polarization loss capacity.Remarkably,as-fabricated FCM-3 harvests a broad effective absorption bandwidth(EAB)of 5.12 GHz and a minimum reflection loss(RLmin)value of-45.1 d B.Meanwhile,FCM-3 can accomplish a greatest radar cross section(RCS)reduction value of 18.52 d B m2when the detection angle is 0°.Thus,the convenient computer simulation technology(CST)simulations and encouraging accomplishments provide a novel avenue for the further development of efficient and lightweight MA materials. 展开更多
关键词 MoS2 Multi-interface Polarization loss Microwave absorption RCS simulation
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Anchoring 1T-MoS2petals on N-doped reduced graphene oxide for exceptional electromagnetic wave absorption 认领 引用 被引量：11
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作者 Jia Zhao Haoran Lai Ming Li 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2025年第3期619-630,共12页
The effective construction of electromagnetic(EM)wave absorption materials with thin matching thickness,broad bandwidth,and remarkable absorption is a great solution to EM pollution,which is a hot topic in current env... The effective construction of electromagnetic(EM)wave absorption materials with thin matching thickness,broad bandwidth,and remarkable absorption is a great solution to EM pollution,which is a hot topic in current environmental governance.In this study,N-doped reduced graphene oxide(N-rGO)was first prepared using a facile hydrothermal method.Then,high-purity 1T-MoS2petals were homogeneously anchored to the wrinkled surface of N-rGO to fabricate 1T-MoS2@N-rGO nanocomposites.The numerous electric di-poles and profuse heterointerfaces in 1T-MoS2@N-rGO would induced the multiple reflection and scattering of EM waves in a distinct-ive multidimensional structure formed by two-dimensional N-rGO and 1T-MoS2microspheres with plentiful thin nanosheets,remarkable conduction loss derived from the migration of massive electrons in a well-constructed conductive network formed by 1T-MoS2@N-rGO,and abundant polarization loss(including dipolar polarization loss and interfacial polarization loss).All of these gave the 1T-MoS2@N-rGO nanocomposites superior EM wave absorption performances.The effective absorption bandwidth of 1T-MoS2@N-rGO reached 6.48 GHz with a relatively thin matching thickness of 1.84 mm,and a minimum reflection loss of-52.24 dB was achieved at 3.84 mm.Additionally,the radar scattering cross-section reduction value of 1T-MoS2@N-rGO was up to 35.42 dB·m2 at 0°,which further verified the huge potential of our fabricated 1T-MoS2@N-rGO nanocomposites in practical applications. 展开更多
关键词 1T-MoS2@N-rGO nanocomposites conduction loss polarization loss ultrathin matching thickness electromagnetic wave absorption
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Harmonization of heterointerface states to enhance built-in electric field effects for electromagnetic wave absorption 认领 引用 被引量：1
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作者 Hongbao Zhu Yi Yan +9 位作者 Jintang Zhou Jiaqi Tao Kexin Zou Zhenyu Cheng Zhengjun Yao Xuewei Tao Yiming Lei Yao Ma Peijiang Liu Hexia Huang 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2025年第26期223-234,共12页
Heterointerface engineering based on built-in electric field(BIEF)has been well-received in electromagnetic wave(EMW)absorption.However,the influence of interface size and number of interfaces on the BIEF and interfac... Heterointerface engineering based on built-in electric field(BIEF)has been well-received in electromagnetic wave(EMW)absorption.However,the influence of interface size and number of interfaces on the BIEF and interface polarization loss mechanism remains unclear.Here,we designed a ternary dual het-erointerfaces Co@C/SiO2nanocomposite.Experimental and theoretical analyses show that Co@C/SiO2has abundant Mott-Schottky heterointerfaces,and a reasonable increase in the heterointerface area leads to a strong BIEF effect,where the charge accumulates at the interface and subsequently migrates along the direction of the alternating electromagnetic field to promote the dissipation of EMW by polarization loss.However,an excessive number of interfaces leads to many carriers being bound by the interfaces,which is not conducive to forming electron channels.By coordinating the heterointerface states to achieve optimal EMW absorption performance,SZ-3 can accomplish an effective absorption width(EAB)of 5.93 GHz at a thickness of 1.91 mm.This work provides new ideas and methods for BIEF-based heterointerface engineering applied to EMW absorption materials. 展开更多
关键词 Electromagnetic wave absorption Heterointerface Built-in electric field Polarization loss Interface state
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Supramolecular self-assembly derived graphitic carbon nitride nanocomposites toward wide bandwidth electromagnetic wave absorption 认领 引用
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作者 Pengcheng Shu Juhua Luo +5 位作者 Xinzhi Zhou Yun Cui Ziyang Dai Yuhan Wu Xing Liu Xiangcheng Li 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2025年第34期256-267,共12页
Graphitic carbon nitride(g-C3N4)has garnered significant attention due to its remarkable advantages such as lightweight,exceptional chemical stability and defect-rich surface.Nevertheless,its inadequate electric... Graphitic carbon nitride(g-C3N4)has garnered significant attention due to its remarkable advantages such as lightweight,exceptional chemical stability and defect-rich surface.Nevertheless,its inadequate electrical conductivity and impedance matching hindered the practical implementation in the electromagnetic wave absorption(EMWA)field.To address these challenges,we developed a composites system of carbon spheres/g-C3N4(CCN)through a supramolecular self-assembly strategy,subsequently integrated with reduced graphene oxide(RGO)via a water bath method.Systematic investigation revealed that the EMWA performance of CCN/RGO composites exhibited a distinct dependence(a trend of first increasing and then decreasing)on RGO content.Especially,when the mass ratio of RGO to CCN was 20%,the CCN/RGO composite brought a minimum reflection loss value of-45.40 dB at 13.44 GHz and a broad effective absorbing bandwidth of 6.32 GHz at 2.19 mm.First-principles calculations based on density functional theory suggested that the constructed heterostructure effectively facilitated electron mobility and charge redistribution,boosting both conductive loss and polarization loss mechanisms.The exceptional absorption performance was ascribed to the synergistic effects of conductive loss,relaxation loss,and suitable impedance matching.As a results,this work provided a rational design strategy for high-performance g-C3N4-based EMWA materials. 展开更多
关键词 Graphitic carbon nitride Electromagnetic wave absorption Conductivity Impedance matching Polarization loss
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Hollow engineering in CoNi@Air@C@MoS2 multicomponent composites derived from bimetallic CoNi Prussian blue analogs for ultra-wide bandwidth and strong electromagnetic wave absorption 认领 引用 被引量：4
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作者 Ziqing Yang Qiqin Liang +8 位作者 Xiaosi Qi Beibei Zhan Xiu Gong Yunpeng Qu Junfei Ding Jing-Liang Yang Yanli Chen Qiong Peng Wei Zhong 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2025年第9期35-43,共9页
In recent years,two-dimensional layered transition metal dichalcogenides-based multicomponent com-posites(MCCs)acting as electromagnetic wave(EMW)materials have received intensive investiga-tions.However,the vulcanica... In recent years,two-dimensional layered transition metal dichalcogenides-based multicomponent com-posites(MCCs)acting as electromagnetic wave(EMW)materials have received intensive investiga-tions.However,the vulcanication of metal greatly hindered their enhancement of EMW absorption per-formances(EMWAPs).Herein,a combined metal-organic frameworks-derived and hydrothermal strat-egy was presented to produce yolk-shell structure(YSS)CoNi@Air@C@MoS2 MCCs.The results showed that the thermal and hydrothermal treatments resulted in the generation of YSS and two-dimensional MoS2 nanosheets,which maintained the original morphology of CoNi Prussian blue analogues.The pro-tection of thick C layer well inhibited the vulcanization of inner CoNi alloy.The formed sheet-like MoS2 further optimized impedance matching characteristics,which led to the satisfactory EMWAPs of CoNi@Air@C@MoS2 MCCs.Furthermore,the EMWAPs could be further improved by optimizing the Ni:Co atom ratios CoNi@Air@C@MoS2 MCCs,which stemmed from their boosted impedance matching perfor-mances,EMW attention and polarization loss abilities.The absorption bandwidth and reflection loss val-ues for YSS CoNi@Air@C@MoS2 MCCs are 8 GHz and−60.83 dB,which covered almost all C-Ku bands.In general,our research work provided a valid strategy to produce YSS magnetic CoNi@Air@C@MoS2 MCCs with high efficiency,which well avoided the vulcanization of metal nanoparticles,made best of hollow engineering and atomic ratio optimization strategy to boost the comprehensive EMWAPs. 展开更多
关键词 Hollow engineering CoNi@Air@C@MoS2 Polarization loss Ultra-wide bandwidth Microwave absorption
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High-entropy transition metal carbide nanowires with enhanced microwave absorption properties 认领 引用 被引量：4
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作者 Yujie Zhu Li Guan +9 位作者 Chenqiang Duan Jiaxin Zhang Zhikai Yan Lanchao Wen Zhaohua Wang Xiangxi Sun Yuling Yao Xiaoqin Guo Rui Zhang Biao Zhao 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2025年第21期302-311,共10页
High-entropy carbides are increasingly favored as electromagnetic wave-absorbing materials because of their customizable structures and distinctive high-entropy effects.Nonetheless,the influence of entropy changes on ... High-entropy carbides are increasingly favored as electromagnetic wave-absorbing materials because of their customizable structures and distinctive high-entropy effects.Nonetheless,the influence of entropy changes on the absorptive characteristics of high-entropy carbide ceramics remains underexplored.In this work,the impact of increased entropy on the absorption characteristics of stable high-entropy transition metal carbides has been systematically studied.This work prepared three carbides ceramics with different entropy values:(Mo1/3Nb1/3Ta1/3)C,(Ti1/4Mo1/4Nb1/4Ta1/4)C,and(Zr1/5Ti1/5Mo1/5Nb1/5Ta1/5)C.The impact of entropy variation in high-entropy carbide nanowires on their wave-absorbing properties was studied.The results showed excellent electromagnetic wave absorption,achieving a minimum reflection loss of−50.08 dB at 1.8 mm,and demonstrating an effective absorption bandwidth of 4.675 GHz at 1.7 mm.In addition,through detailed structure,morphology,and chemical state characterization,as well as wave absorption capability testing,research indicates that high-entropy carbides can effectively regulate defects by adjusting the size of entropy,leading to lattice distortion,discontinuous lattice fringes,and vacancies.The presence of these defects enhances the polarization loss and balances the excessively high dielectric constant of high-entropy carbide ceramics.Additionally,the design of one-dimensional structures facilitates carrier migration,thereby increasing conductive loss.Collectively,these factors enhance the ability of the samples to attenuate electromagnetic waves.This study lays a theoretical foundation and provides experimental guidance for developing new high-performance materials for electromagnetic wave absorption. 展开更多
关键词 High-entropy carbides nanowires Size of entropy Defects Polarization loss
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