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One-step fabrication of TiO2/graphene hybrid mesoporous film with enhanced photocatalytic activity and photovoltaic performance 认领 引用 被引量：4
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作者 Junxiong Guo Yiyi Li +6 位作者 Shangdong Li Xumei Cui Yu Liu Wen Huang Linna Mao Xiongbang Wei Xiaosheng Zhang 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2020年第8期1208-1216,共9页
We synthesized a mesoporous film based on TiO2-reduced graphene oxide(RGO)hybrids using a one-step vapor-thermal method without the need for an additional annealing process.The vapor-thermally prepared TiO2-graphene h... We synthesized a mesoporous film based on TiO2-reduced graphene oxide(RGO)hybrids using a one-step vapor-thermal method without the need for an additional annealing process.The vapor-thermally prepared TiO2-graphene hybrid(VTH)features unique structures with an ultra-large specific surface area of^260 m^2 g^-1 and low aggregation,giving rise to enhanced light harvesting and increased charge generation and separation efficiency.It was observed that a mesoporous film with uniform pore distribution is simultaneously obtained during the VTH growth process.When a 5.0 wt%RGO VTH film was used as the active layer in photocatalysis,the highest photocatalytic activity for degradation of methyl orange was achieved.For another,when a 0.75 wt%RGO VTH film was used as the photoanode in a dye-sensitized solar cell,the power conversion efficiency reached 7.58%,which represents an increase of 73.1%compared to a solar cell using an a photoanode of pure TiO2 synthesized by a traditional solvothermal method.It is expected that this facile method for the synthesis of TiO2/graphene hybrid mesoporous films will be useful in practical applications for preparing other metal oxide/graphene hybrids with ultra-high photocatalytic activity and photovoltaic performance. 展开更多
关键词 TiO2-graphene hybrid Catalytic activity Photoanode Vapor-thermal method Mesoporous film
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Bottom-Up Strategy Toward 3D Porous MXene/MoS2Nanosheets/Graphene Nanoarchitectures as Highly-Efficient Hydrogen Evolution Electrocatalysts 认领 引用 被引量：1
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作者 Haiyan He Yuxian Chen +6 位作者 Chenyu Xu Taiji Gan Chi Ge Quanguo Jiang Jian Zhang Lei Lei Huajie Huang 《Rare Metals》 SCIE EI CAS CSCD 2026年第3期546-555,共10页
As a core component in the electrochemical water splitting system,the cathode catalyst is capable of boosting the kinetics of the hydrogen evolution reaction(HER),while the scarcity and expenditure of current noble me... As a core component in the electrochemical water splitting system,the cathode catalyst is capable of boosting the kinetics of the hydrogen evolution reaction(HER),while the scarcity and expenditure of current noble metal-based electrocatalysts seriously restrict the large-scale commercial development of hydrogen manufacturing devices.Here,we present a robust and controllable self-assembly method for the spatial construction of three-dimensional(3D)porous ternary nanoarchitectures comprising Ti3C2Tx MXene,MoS2nanosheets,and graphene(MX/MoS2/G).This bottom-up strategy contributes to the intriguing structural features of the resulting nanoarchitectures,including 3D crosslinked porous networks,ultrathin walls,plentiful exposed reactive sites,and numerous efficient electron channels.As a consequence,the optimized MX/MoS2/G electrocatalyst depicts superior electrocatalytic HER performance in terms of a competitive onset potential,a small Tafel slope,a large electrochemically active surface area,and exceptional durability,which significantly outperforms the bare MXene,MoS2,graphene,as well as binary MXene/graphene and MoS2/graphene electrocatalysts. 展开更多
关键词 3D graphene electrocatalyst hydrogen evolution MoS2nanosheets Ti3C2TxMXene
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Rare-earth metal synergy in Dy2O3/graphene/Gd-MOF ternary structures toward electrocatalytic OER reactions 认领 引用
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作者 Yuan Ge Cuihong Zhang +2 位作者 Qian Wu Zhenzhen Yu Zemin He 《Journal of Rare Earths》 SCIE EI CAS CSCD 2026年第2期630-641,共12页
This research investigated the electrocatalytic properties of a ternary structured dysprosium oxide(Dy2O3)/graphene sheets(Gs)/gadolinium-metal organic frameworks(Gd-MOF)system for oxygen evolution reactions(OER... This research investigated the electrocatalytic properties of a ternary structured dysprosium oxide(Dy2O3)/graphene sheets(Gs)/gadolinium-metal organic frameworks(Gd-MOF)system for oxygen evolution reactions(OER).The ternary Dy2O3/Gs/Gd-MOF composite was synthesised through a simple solvothermal method.The physicochemical properties of all materials were investigated using powder X-ray diffraction(p-XRD),Raman spectroscopy,ultraviolet–visible(UV–Vis)spectroscopy,UV-diffuse reflectance spectroscopy(UV-DRS),Fourier transform infrared spectroscopy(FT-IR),field-emission scanning electron microscopy(FESEM),transmission electron microscopy(TEM),energy-dispersive Xray spectroscopy(EDS),thermogravimetry(TGA)and X-ray photoelectron spectroscopy(XPS).The engineered heterostructure electrodes are fine-tuned to enhance the oxygen evolution reaction(OER)in an alkaline medium using 1.0 mol/L KOH.The ternary Dy2O3/Gs/Gd-MOF composite exhibits a diverse morphology comprising nanosheets,rods,and particle-like features.In contrast to bare and binary electrocatalysts,the ternary Dy2O3/Gs/Gd-MOF electrocatalyst shows superior OER performance and current density due to the successful integration of graphene sheets and Gd-MOF within the Dy2O3structure.Thus,the ideal ternary Dy2O3/Gs/Gd-MOF shows the minimum overpotential of 339 mV at 50 mA/cm2,a Tafel slope value of 136 m V/dec,and maintains long-standing stability for 24 h at a polarisation current of 50 mA/cm2.The double layer capacitance(Cdl)of the Dy2O3/Gs/Gd-MOF heterostructure(34.69 mF/cm2)surpasses that of the bare and binary electrocatalysts,suggesting that the ternary Dy2O3/Gs/Gd-MOF electrocatalyst possesses a larger electrochemically active surface area.Ultimately,it is shown that the synergetic effect of the Dy2O3/Gs/Gd-MOF electrocatalyst plays a significant role in its remarkable stability during extended OER assessments. 展开更多
关键词 Gd-MOF Graphene sheets Dy2O3 Electrocatalyst OER Rare earths
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Photocatalytic CO2Reduction Over BiOX on Needle Coke-Derived Graphene Composites 认领 引用
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作者 Tongyu Wu Xiaoxiao Yu +5 位作者 Fuhai Zhang Lei Wang Minmeng Tang Yanhong Chao Haiyan Liu Wenshuai Zhu 《Carbon and Hydrogen》 SCIE CAS CSCD 2026年第2期217-225,共9页
Substantial research has been dedicated to advancing visible-light photocatalysts for the conversion of CO2into sustainable fuels.The overall efficiency of this process is critically dependent on both the effective... Substantial research has been dedicated to advancing visible-light photocatalysts for the conversion of CO2into sustainable fuels.The overall efficiency of this process is critically dependent on both the effective generation/separation of photogenerated charge carriers and the adsorption/activation of CO2reactants.Bismuth oxyhalides(BiOX)are promising due to their layered structure and built-in electric field,which facilitate charge separation.However,their practical application is often limited by insufficient CO2adsorption capacity and restricted visible-light harvesting.Herein,we report a series of composite photocatalysts constructed via the in situ growth of BiOX on needle coke-derived graphene(NCG).This integrated structure leverages the high specific surface area and inherent heteroatom doping of NCG to enhance CO2adsorption,while the resulting intimate heterojunction significantly promotes visible-light absorption(especially within 500-800 nm)and accelerates interfacial charge transfer.The optimized BiOBr-25%NCG composite achieves a remarkable CO production rate of 46.32μmol·g−1·h−1from photocatalytic CO2reduction without any sacrificial agents,representing a 13-fold enhancement over pristine NCG and a∼4000-fold increase compared to bare BiOBr.The superior performance is attributed to the synergistic enhancement of light absorption,charge separation kinetics,and CO2adsorption activation.This work presents a viable strategy for developing efficient,low-cost photocatalytic systems by integrating functional carbon matrices derived from industrial byproducts with semiconductor catalysts. 展开更多
关键词 BiOBr CO2reduction composite material needle coke-derived graphene photocatalysis
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Boosting supercapacitor efficiency withδ-MnO2 nanoflakes on electrochemically exfoliated graphene nanosheets 认领 引用 被引量：1
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作者 Qian Li Hu Zheng +5 位作者 Cuiping Li Li Li Ying Lin Qin Hao Caixia Xu Kai Wang 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2026年第1期249-258,共10页
Supercapacitors represent one specific class of energy storage devices that bridge the gap between traditional capacitors and batteries.In current work,δ-MnO2 nanoflakes arrayed on electrochemically exfoliated gra... Supercapacitors represent one specific class of energy storage devices that bridge the gap between traditional capacitors and batteries.In current work,δ-MnO2 nanoflakes arrayed on electrochemically exfoliated graphene(EEG)nanosheets were easily made as one composited electrode material for boosting the charge storage performances of supercapacitors.Coupled with the fluent electron and ion transport from two-dimensional EEG nanosheets,the uniformly anchoredδ-MnO2 nanoflake arrays present high reversible capacity,superior cycling stability,and unique rate capability.As expected,the MnO2/EEG-10 electrode delivers high specific capacitance of 190 F·g−1 at 0.2 A·g−1,and holds 97.3%of its initial capacitance after 10000 cycles at 5 A·g−1.Furthermore,an asymmetrical supercapacitor using MnO2/EEG-10 as the positive electrode achieves an energy density of 17.7 W·h·kg−1 at a power density of 922.7 W·kg−1 with 82.9%capacity retention upon 10000 cycles at 5 A·g−1.This work highlights the facile fabrication of high-performance MnO2/graphene composites with excellent structure stability using graphene nanosheets as the conductive matrix. 展开更多
关键词 δ-MnO2nanoflakes Electrochemically exfoliated graphene Hydrothermal synthesis Supercapacitor Electrode stability
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Chemical blowing strategy for three-dimensional graphene materials:Overcoming graphene restacking and integrating macro/microstructural construction 认领 引用
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作者 Kun Han Jianfei Liu +3 位作者 Qigao Cao Wan Rong Zhiwei Liu Ping Li 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2026年第6期1749-1767,共19页
Carbon materials,characterized by diverse allotropes,have played critical roles in the advancement of human civilization and industrial manufacturing.As a prominent allotrope,two-dimensional(2D)graphene materials have... Carbon materials,characterized by diverse allotropes,have played critical roles in the advancement of human civilization and industrial manufacturing.As a prominent allotrope,two-dimensional(2D)graphene materials have attracted increasing attention since their discovery owing to their exceptional properties;however,they suffer from the fundamental challenges of restacking and agglomeration,which diminish their performance in practical applications.The design of three-dimensional(3D)frameworks composed of 2D graphene sheets is considered an effective strategy to resolve these issues and enable the efficient utilization of the properties of graphene.Compared with conventional fabrication methods,such as graphene oxide assembly and template-assisted chemical vapor deposition,the chemical blowing strategy is distinguished by its low cost,facile process,and superior controllability.Despite these advantages,few review articles have focused specifically on the fabrication of 3D graphene materials via chemical blowing.This review outlines the chemical blowing strategy and clarifies the fundamentals of the blowing process,its historical evolution,and the classification of 3D graphene materials.Subsequently,the recent progress in 3D graphene foams and powders fabricated via chemical blowing is detailed,with an emphasis on the underlying synthesis chemistry.Following an analysis of the correlation between 3D graphene foam and powder materials,their design considerations and functional applications are discussed.This discussion provides recommendations for the synthesis of specific 3D graphene materials and elucidates their differences and commonalities across various application scenarios.Finally,after a brief summary,current challenges,opportunities,and future research directions for the development of chemical blowing are proposed. 展开更多
关键词 3D graphene chemical blowing graphene restacking graphene powder materials graphene foam materials 2D materials
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The electronic interaction of encapsulating graphene layers with FeCo alloy promotes efficient CO2Hydrogenation to light olefins 认领 引用 被引量：4
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作者 Miao Zhang Limin Zhang +3 位作者 Mingrui Wang Guanghui Zhang Chunshan Song Xinwen Guo 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2025年第1期366-375,共10页
CO2hydrogenation to value-added light olefins(C2-4=)is crucial for the utilization and cycling of global carbon resource.Moderate CO2activation and carbon chain growth ability are key factors for iron-based c... CO2hydrogenation to value-added light olefins(C2-4=)is crucial for the utilization and cycling of global carbon resource.Moderate CO2activation and carbon chain growth ability are key factors for iron-based catalysts for efficient CO2conversion to target C2-4=products.The electronic interaction and confinement effect of electron-deficient graphene inner surface on the active phase are effective to improve surface chemical properties and enhance the catalytic performance.Here,we report a core-shell FeCo alloy catalyst with graphene layers confinement prepared by a simple sol-gel method.The electron transfer from Fe species to curved graphene inner surface modifies the surface electronic structure of the active phaseχ-(FexCo1-x)5C2and improves CO2adsorption capacity,enhancing the efficient conversion of CO2and moderate C-C coupling.Therefore,the catalyst FeCoK@C exhibits C2-4=selectivity of 33.0%while maintaining high CO2conversion of 52.0%.The high stability without obvious deactivation for over 100 h and unprecedented C2-4=space time yield(STY)up to 52.9 mmolCO2·g-1·h-1demonstrate its potential for practical application.This work provides an efficient strategy for the development of high-performance CO2hydrogenation catalysts. 展开更多
关键词 CO2hydrogenation Lightolefins Graphene layers Cobalt-iron alloy carbide Electronicinteraction
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Synergistic enhancement of ion/electron transport by ultrafine nanoparticles and graphene in Li2FeTiO4/C/G nanofibers for symmetric Li-ion batteries 认领 引用 被引量：2
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作者 Wenjie Ma Yakun Tang +4 位作者 Yue Zhang Xiaohui Li Lang Liu Xueting Wang Yuliang Cao 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2025年第2期42-51,I0002,共10页
Low-cost Fe-based disordered rock salt(DRX)Li2FeTiO4is capable of providing high capacity(295 mA h g-1)by redox activity of cations(Fe2+/Fe4+and Ti3+/Ti4+)and anionic oxygen.However,DRX structures... Low-cost Fe-based disordered rock salt(DRX)Li2FeTiO4is capable of providing high capacity(295 mA h g-1)by redox activity of cations(Fe2+/Fe4+and Ti3+/Ti4+)and anionic oxygen.However,DRX structures lack transport channels for ions and electrons,resulting in sluggish kinetics,poor electrochemical activity,and cyclability.Herein,graphene conductive carbon network permeated Li2FeTiO4(LFT/C/G)nanofibers are successfully prepared by a facile sol-gel assisted electrospinning method.Ultrafine Li2FeTiO4nanoparticles(2 nm)and one-dimensional(1D)structure provide abu ndant active sites and unobstructed diffu sion channels,accelerating ion diffusion.In addition,introducing graphene reduces the band gap and Li+diffusion barrier and improves the dynamic properties of Li2FeTiO4,thus achieving a relatively mild interfacial reaction and reversible redox reaction.As expected,the LFT/C/1.0G cathode delivers a remarkable discharge capacity(238.5 mA h g-1),high energy density(508.8 Wh kg-1),and excellent rate capability(51.2 mA hg-1at 1.0 A g-1).Besides,the LFT/C/1.0G anode also displays a high capacity(514.5 mA h g-1at 500 mA g-1)and a remarkable rate capability(243.9 mA h g-1at 8 A g-1).Moreover,the full batteries based on the LFT/C/1.0G symmetric electrode demonstrate a reversible capacity of 117.0 mA h g-1after 100 cycles at 50 mA g-1.This study presents useful insights into developing cost-effective DRX cathodes with durable and fast lithium storage. 展开更多
关键词 Disordered rock salt Li2FeTiO4 Graphene 1D structure Rapid ion/electron transport Lithium-ion battery electrode
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Three-dimensional MIL-88A(Fe)-derived α-Fe2O3 and graphene composite for efficient photo-Fenton-like degradation of ciprofloxacin 认领 引用 被引量：1
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作者 Ning Liu Man Tian +7 位作者 Ye Zhang Jinming Yang Zhihao Wang Wangxi Dai Guixiang Quan Jianqiu Lei Xiaodong Zhang Liang Tang 《Chinese Chemical Letters》 SCIE CAS CSCD 2025年第12期548-553,共6页
The photo-assisted Fenton-like method is an effective and sustainable way to remove organic pollutants from water.Herein,a series of three-dimensional composites containing MIL-88A(Fe)-derived α-Fe2O3and graphe... The photo-assisted Fenton-like method is an effective and sustainable way to remove organic pollutants from water.Herein,a series of three-dimensional composites containing MIL-88A(Fe)-derived α-Fe2O3and graphene aerogel(GA-Fe-X)were designed and used as catalysts to degrade ciprofloxacin(CIP)by peroxymonosulfate(PMS)activated photo-Fenton-like technology.The as-prepared GA-Fe-1 displayed remarkable enhancement with a CIP degradation rate constant(0.017 min-1)higher than that of graphene aerogel(0.0031 min-1)and MIL-88A(Fe)(0.0039 min-1).Experimental results demonstrated that the combination of MIL-88A(Fe)-derived α-Fe2O3and graphene aerogel forming GA-Fe-X enhanced the separation efficiency of electron-hole pairs,activating PMS to produce SO4·-,·OH and 1O2 for enhanced CIP degradation through radical and non-radical pathways.The factors affecting CIP degradation during the photoFenton-like process were thoroughly investigated.The possible CIP degradation pathways and ecotoxicity of the intermediates were also analyzed.This work enhances our understanding of the photo-Fenton-like effect in three-dimensional graphene aerogel composites. 展开更多
关键词 Photo-Fenton-like Peroxymonosulfate activation Graphene aerogel MIL-88A(Fe)-derivedα-Fe2O3 Ciprofloxacin
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Enhanced electrocatalytic activities in TiO2-sulfur nanoparticles decorated graphene nanocomposite electrode for detecting formaldehyde compound 认领 引用
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作者 Maulidiyah Maulidiyah Muhammad Nurdin +5 位作者 WD Syafitri Salsabila Suryani Dyah Astuti Thamrin Azis La Ode Muhammad Zuhdi Mulkiyan La Ode Agus Salim Akrajas Ali Umar 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2025年第4期213-219,共7页
The unique properties of TiO2-sulfur(TiO2-S)modified graphene nanocomposite electrode(GPE/TiO2-S)in the electrochemical sensing of formaldehyde compound has been evaluated.We prepared TiO2-S by hydrotherma... The unique properties of TiO2-sulfur(TiO2-S)modified graphene nanocomposite electrode(GPE/TiO2-S)in the electrochemical sensing of formaldehyde compound has been evaluated.We prepared TiO2-S by hydrothermal method and modified the graphene nanocomposite electrode by applying electrochemical cyclic voltammetry(CV)approach.The TiO2-S nanocomposite was characterized by X-ray diffraction(XRD),while the GPE/TiO2-S was examined by scanning electron microscopy(FESEM)and X-Ray fluorosense(XRF)techniques.TiO2-S has a grain size of 19.32 nm.The surface morphology of the GPE/TiO2-S nanocomposite shows a good,intact,and tightly porous structure with TiO2-S covers the graphene surface.The content of optimized GPE/TiO2-S electrodes is 41.5%of graphene,37.8%of TiO2,and 12.4%of sulfur that was prepared by mixing 1 g of TiO2-S with 0.5 g of graphene and 0.3 mL paraffin.The GPE/TiO2-S electrode produces a high anodic current(Ipa)of 800μA and a high cathodic current(Ipc)of-600μA at a scan rate of 0.1 V·s-1using an electrolyte0.01 mol·L-1K_3[Fe(CN)_6]solution containing 150 mg·L-1formaldehyde.The limit of detection can reach as low as 9.7 mg·L-1with stability with Horwitz ratio value as low as 0.397.The composite electrode also exhibits excellent slectivity properties by showing clear formaldehyde sugnal in the presence of high concentration of interfering agent.GPE/TiO2-S electrode should find potential application of formaldehyde detection in food industries. 展开更多
关键词 Food safety Formaldehyde Voltammetry Graphene TiO2-S
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Constant-potential simulation of electrocatalytic N2 reduction over atomic metal-N-graphene catalysts 认领 引用
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作者 Sanmei Wang Yong Zhou +3 位作者 Hengxin Fang Chunyang Nie Chang Q Sun Biao Wang 《Chinese Chemical Letters》 SCIE CAS CSCD 2025年第3期439-443,共5页
Charge-neutral method(CNM)is extensively used in investigating the performance of catalysts and the mechanism of N2electrochemical reduction(NRR).However,disparities remain between the predicted potentials required... Charge-neutral method(CNM)is extensively used in investigating the performance of catalysts and the mechanism of N2electrochemical reduction(NRR).However,disparities remain between the predicted potentials required for NRR by the CNM methods and those observed experimentally,as the CNM method neglects the charge effect from the electrode potential.To address this issue,we employed the constant electrode potential(CEP)method to screen atomic transition metal-N-graphene(M1/N-graphene)as NRR electrocatalysts and systematically investigated the underlying catalytic mechanism.Among eight types of M1/N-graphene(M1=Mo,W,Fe,Re,Ni,Co,V,Cr),W1/N-graphene emerges as the most promising NRR electrocatalyst with a limiting potential as low as−0.13 V.Additionally,the W1/N-graphene system consistently maintains a positive charge during the reaction due to its Fermi level being higher than that of the electrode.These results better match with the actual circumstances compared to those calculated by conventional CNM method.Thus,our work not only develops a promising electrocatalyst for NRR but also deepens the understanding of the intrinsic electrocatalytic mechanism. 展开更多
关键词 N2 reduction Single-atom catalysts Constant potential Graphene DFT
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Graphene-supported isolated platinum atoms and platinum dimers for CO2 hydrogenation:Catalytic activity and selectivity variations 认领 引用
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作者 Sanmei Wang Dengxin Yan +1 位作者 Wenhua Zhang Liangbing Wang 《Chinese Chemical Letters》 SCIE CAS CSCD 2025年第4期241-245,共5页
Manipulating catalyst structures to control product selectivity while maintaining high activity presents a considerable challenge in CO2hydrogenation.Combining density functional theory calculations and microkineti... Manipulating catalyst structures to control product selectivity while maintaining high activity presents a considerable challenge in CO2hydrogenation.Combining density functional theory calculations and microkinetic analysis,we proposed that graphene-supported isolated Pt atoms(Pt1/graphene)and Pt2dimers(Pt2/graphene)exhibited distinct selectivity in CO2hydrogenation.Pt1/graphene facilitated the conversion of CO2into formic acid,whereas Pt2/graphene favored methanol generation.The variation in product selectivity arose from the synergistic interaction of Pt2dimers,which facilitated the migration of H atoms between two Pt atoms and promoted the transformation from*COOH intermediates to*C(OH)2intermediates,altering the reaction pathways compared to isolated Pt atoms.Additionally,an analysis of the catalytic activities of three Pt1/graphene and three Pt2/graphene structures revealed that the turnover frequencies for formic acid generation on Pt1ii/graphene and methanol generation on Pt2i/graphene were as high as 744.48 h-1and 789.48 h-1,respectively.These values rivaled or even surpassed those previously reported in the literature under identical conditions.This study provides valuable insights into optimizing catalyst structures to achieve desired products in CO2hydrogenation. 展开更多
关键词 CO2hydrogenation Graphene Pt single-atom Pt2dimers DFT
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Enhanced post-combustion CO2 capture and direct air capture by plasma surface functionalization of graphene adsorbent 认领 引用
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作者 Rahul Navik Eryu Wang +3 位作者 Xiao Ding Huang Yunyi Yiyu Liu Jia Li 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2025年第1期653-664,共12页
Graphene has enormous potential to capture CO2due to its unique properties and cost-effectiveness.However,graphene-based adsorbents have drawbacks of lower CO2adsorption capacity and poor selectivity.This work d... Graphene has enormous potential to capture CO2due to its unique properties and cost-effectiveness.However,graphene-based adsorbents have drawbacks of lower CO2adsorption capacity and poor selectivity.This work demonstrates a one-step rapid and sustainable N2/H2plasma treatment process to prepare graphene-based sorbent material with enhanced CO2adsorption performance.Plasma treatment directly enriches amine species,increases surface area,and improves textural properties.The CO2adsorption capacity increases from 1.6 to 3.3 mmol/g for capturing flue gas,and from 0.14 to 1.3 mmol/g for direct air capture (DAC).Importantly,the electrothermal property of the plasma-modified aerogels has been significantly improved,resulting in faster heating rates and significantly reducing energy consumption compared to conventional external heating for regeneration of sorbents.Modified aerogels display improved selectivity of 42 and 87 after plasma modification for 5 and 10 min,respectively.The plasma-treated aerogels display minimal loss between 17%and 19% in capacity after 40 adsorption/desorption cycles,rendering excellent stability.The N2/H2plasma treatment of adsorbent materials would lower energy expenses and prevent negative effects on the global economy caused by climate change. 展开更多
关键词 Carbon neutrality CO2capture Climate change Plasma treatment Graphene aerogel
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Synergistic Integration of FeCo2S4 Particles with Holey Graphene Hydrogel for Enhanced Performance Solid-state Supercapacitor 认领 引用 被引量：1
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作者 ZHOU Chuang DING Ling +9 位作者 LI Shiqian ZHANG Qingtian ZHAO Zhifu WANG Qi CHEN Hao CHENG Zhengzai DJOUONKEP Lesly Dasilva Wandji WANG Guanghua XIANG Wenxin LI Wenbing 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS CSCD 2025年第4期984-993,共10页
In this study,the holey graphene was prepared by microwave-assisted chemical etching.The three-dimensional(3D)holey graphene hydrogel was obtained through hydrothermal self-assembly method,followed by the introduction... In this study,the holey graphene was prepared by microwave-assisted chemical etching.The three-dimensional(3D)holey graphene hydrogel was obtained through hydrothermal self-assembly method,followed by the introduction of FeCo2S4particles.The resulting holey graphene hydrogel,characterized by high specific surface area and abundant pores combined with FeCo2S4with high pseudocapacitance by interfacial interaction,shortened the mass transport path and enhanced the specific capacitance.The findings reveal that the holey graphene hydrogel/FeCo2S4(FeCo2S4/HGH)composite exhibits high specific capacitance and impressive rate capability(413.4 F·g-1at 1 A·g-1,300.4 F·g-1at 6 A·g-1).The symmetric supercapacitor operated within a stable potential window of 0.1-1.6 V,achieving specific capacitance of 127.5 F·g-1at 1 A·g-1,and can deliver 37.1 Wh·kg-1at a power density of 1499 W·kg-1.Besides,under the current density of 3 A·g-1,the supercapacitor retained 90.8%of its capacitance after 5000 cycles,demonstrating exceptional cycle stability.This study presents an efficient method for fabricating advanced integrated supercapacitors electrodes with enhanced energy density. 展开更多
关键词 holey graphene FeCo2S4/HGH microwave assisted chemical etching symmetric supercapacitor
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A convenient ultrasonic path for van der Waals heterostructure construction:Study on MoS2/graphene as an example 认领 引用
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作者 Wen Zhang Mingyang Gao +4 位作者 Jun Guo Licun Fu Ling Liu Jing Wang Teng Ma 《Chinese Physics B》 SCIE EI CAS CSCD 2025年第11期506-512,共7页
Ultrasound is a powerful tool in materials processing,yet its application in constructing van der Waals(vdW)heterostructures remains under-explored.In this study,MoS2and graphene—two widely studied 2D materials—w... Ultrasound is a powerful tool in materials processing,yet its application in constructing van der Waals(vdW)heterostructures remains under-explored.In this study,MoS2and graphene—two widely studied 2D materials—were successfully assembled into vdW heterostructures via a convenient ultrasound-driven self-assembly approach.The morphology of the heterostructures was characterized by scanning electron microscopy(SEM),while their structural and compositional features were confirmed through x-ray diffraction(XRD),Raman spectroscopy,and x-ray photoelectron spectroscopy(XPS).Red-shifted Raman peaks and decreased binding energies in XPS spectra provided strong evidence of successful heterostructure formation.A three-stage assembly mechanism—comprising dispersion,assembly,and adjustment—is proposed,with acoustic cavitation playing a key role in driving the process.This study not only demonstrates the feasibility of synthesizing 2D heterostructures via an ultrasonic route but also lays a foundation for future scalable,energy-efficient fabrication strategies. 展开更多
关键词 van der Waals heterostructure ultrasound assembly MoS2 graphene
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Cobalt single atom-phosphate functionalized reduced graphene oxide/perylenetetracarboxylic acid nanosheet heterojunctions for efficiently photocatalytic H2O2production 认领 引用
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作者 Qihang Wang Li Meng +6 位作者 Zhuo Li Zhuoran Yang Yinan Tang Lang Yu Zhijun Li Jianhui Sun Liqiang Jing 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2025年第8期192-203,共12页
The production of hydrogen peroxide(H2O2)via artificial photosynthesis using single-atom semiconductor photocatalysts represents a promising green and sustainable technology.However,its efficiency is still limit... The production of hydrogen peroxide(H2O2)via artificial photosynthesis using single-atom semiconductor photocatalysts represents a promising green and sustainable technology.However,its efficiency is still limited by sluggish water oxidation kinetics,poor photogenerated charge separation,and insufficient O2adsorption and activation capabilities.Herein,uniformly dispersed single-atom catalysts(SACs)with a Co-N4coordination structure have been synthesized by thermally transforming cobalt phthalocyanine(CoPc)assemblies pre-anchored on phosphate functionalized reduced graphene oxide(Co@rGO-P),and then used to construct heterojunctions with perylenetetracarboxylic acid(PTA)nanosheets for photocatalytic H2O2production by an in-situ growth method.The optimized Co@rGO-P/PTA achieved an H2O2production rate of 1.4 mmol g-1h-1in pure water,with a 12.9-fold enhancement compared to pristine PTA nanosheets exhibiting competitive photoactivity among reported perylene-based materials.Femtosecond transient absorption spectra,in-situ diffuse reflectance infrared Fourier transform spectra and theoretical calculations reveal that the exceptional performance is attributed to the enhanced electron transfer from PTA to rGO via the phosphate bridge and then to the Co-N4,and to the promoted O2adsorption and activation at Co-N4active sites.This work provides a feasible and effective strategy for designing highly efficient single-atom semiconductor heterojunction photocatalysts for H2O2production. 展开更多
关键词 Single-atom photocatalyst Perylenetetracarboxylic acid nanosheet Phosphate-functionalized reduced graphene oxide Charge separation H2O2production
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Integrated photonic polarizers with 2D reduced graphene oxide 认领 引用 被引量：1
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作者 Junkai Hu Jiayang Wu +8 位作者 Di Jin Wenbo Liu Yuning Zhang Yunyi Yang Linnan Jia Yijun Wang Duan Huang Baohua Jia David J.Moss 《Opto-Electronic Science》 CAS 2025年第5期11-26,共16页
Optical polarizers,which allow the transmission of specific polarization states,are essential components in modern optical systems.Here,we experimentally demonstrate integrated photonic polarizers incorporating reduce... Optical polarizers,which allow the transmission of specific polarization states,are essential components in modern optical systems.Here,we experimentally demonstrate integrated photonic polarizers incorporating reduced graphene oxide(rGO)films.2D graphene oxide(GO)films are integrated onto silicon waveguides and microring resonators(MRRs)with precise control over their thicknesses and sizes,followed by GO reduction via two different methods including uniform thermal reduction and localized photothermal reduction.We measure devices with various lengths,thicknesses,and reduction degrees of GO films.The results show that the devices with rGO exhibit better performance than those with GO,achieving a polarization-dependent loss of~47 dB and a polarization extinction ratio of~16 dB for the hybrid waveguides and MRRs with rGO,respectively.By fitting the experimental results with theory,it is found that rGO exhibits more significant anisotropy in loss,with an anisotropy ratio over 4 times that of GO.In addition,rGO shows higher thermal stability and greater robustness to photothermal reduction than GO.These results highlight the strong potential of rGO films for implementing high-performance polarization selective devices in integrated photonic platforms. 展开更多
关键词 integrated optics 2D materials graphene oxide optical polarizers
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Synthesis and Optimization of TiO2/Graphene with Exposed {001} Facets Based on Response Surface Methodology and Evaluation of Enhanced Photocatalytic Activity 认领 引用 被引量：2
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作者 Yifei Wang Zhiyang Zhang +2 位作者 Qianqian Shang Xin Tan Hongmei Wang 《Transactions of Tianjin University》 EI CAS 2018年第5期415-423,共9页
Response surface methodology(RSM)was employed to optimize the control parameters of TiO2/graphene with exposed{001}facets during synthesis,and its enhanced photocatalytic activities were evaluated in the photodegra... Response surface methodology(RSM)was employed to optimize the control parameters of TiO2/graphene with exposed{001}facets during synthesis,and its enhanced photocatalytic activities were evaluated in the photodegradation of toluene.Experimental results were in good agreement with the predicted results obtained using RSM with a correlation coefficient(R2)of 0.9345.When 22.06 mg of graphite oxide(GO)and 2.09 mL of hydrofluoric acid(HF)were added and a hydrothermal time of 28 h was used,a maximum efficiency in the degradation of toluene was achieved.X-ray diffraction(XRD),transmission electron microscopy(TEM),and scanning electron microscopy(SEM)were employed to characterize the obtained hybrid photocatalyst.The electron transferred between Ti and C retarded the combination of electron–hole pairs and hastened the transferring of electrons,which enhanced the photocatalytic activity. 展开更多
关键词 TiO2/graphene Exposed{001}facets synthesis Response surface methodology
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Spatial confinement of free-standing graphene sponge enables excellent stability of conversion-type Fe2O3 anode for sodium storage 认领 引用
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作者 Jun Dong Senyuan Tan +7 位作者 Sunbin Yang Yalong Jiang Ruxing Wang Jian Ao Zilun Chen Chaohai Zhang Qinyou An Xiaoxing Zhang 《Chinese Chemical Letters》 SCIE CAS CSCD 2025年第3期544-549,共6页
Conversion-type anode materials are highly desirable for Na-ion batteries(NIBs)due to their high theoretical capacity.Nevertheless,the active materials undergo severe expansion and pulverization during the sodiation,r... Conversion-type anode materials are highly desirable for Na-ion batteries(NIBs)due to their high theoretical capacity.Nevertheless,the active materials undergo severe expansion and pulverization during the sodiation,resulting in inferior cycling stability.Herein,a self-supporting three-dimensional(3D)graphene sponge decorated with Fe2O3nanocubes(rGO@Fe2O3)is constructed.Specifically,the 3D graphene sponge with resilience and high porosity benefits to accommodate the volume expansion of the Fe2O3nanocubes and facilitates the rapid electrons/ions transport,enabling spatial confinement to achieve outstanding results.Besides,the free-standing rGO@Fe2O3can be directly used as an electrode without additional binders and conductive additives,which helps to obtain a higher energy density.Based on the total mass of the rGO@Fe2O3material,the rGO@Fe2O3anode presents a specific capacity of 859 mAh/g at 0.1 A/g.It also delivers an impressive cycling performance(327 mAh/g after 2000 cycles at 1 A/g)and a superior rate capacity(162mAh/g at 20 A/g).The coin-type Na3V2(PO4)3@C/GO@Fe2O3NIB exhibits an energy density of 265.3Wh/kg.This unique 3D ionic/electronic conductive network may provide new strategies to design advanced conversion-type anode materials for high-performance NIBs. 展开更多
关键词 Conversion-type anode Spatial confinement Fe2O3 Graphene network Self-supporting Sodium-ion batteries
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Confining TiO_2 Nanotubes in PECVD-Enabled Graphene Capsules Toward Ultrafast K-Ion Storage: In Situ TEM/XRD Study and DFT Analysis 认领 引用 被引量：5
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作者 Jingsheng Cai Ran Cai +7 位作者 Zhongti Sun Xiangguo Wang Nan Wei Feng Xu Yuanlong Shao Peng Gao Shixue Dou Jingyu Sun 《Nano-Micro Letters》 SCIE EI CAS CSCD 2020年第9期310-323,共14页
Titanium dioxide(TiO2) has gained burgeoning attention for potassium-ion storage because of its large theoretical capacity,wide availability,and environmental benignity.Nevertheless,the inherently poor conductivity gi... Titanium dioxide(TiO2) has gained burgeoning attention for potassium-ion storage because of its large theoretical capacity,wide availability,and environmental benignity.Nevertheless,the inherently poor conductivity gives rise to its sluggish reaction kinetics and inferior rate capability.Here,we report the direct graphene growth over TiO2 nanotubes by virtue of chemical vapor deposition.Such conformal graphene coatings effectively enhance the conductive environment and well accommodate the volume change of TiO2 upon potassiation/depotassiation.When paired with an activated carbon cathode,the graphene-armored TiO2 nanotubes allow the potassium-ion hybrid capacitor full cells to harvest an energy/power density of 81.2 Wh kg-1/3746.6 W kg-1.We further employ in situ transmis sion electron microscopy and ope rando X-ray diffraction to probe the potassium-ion storage behavior.This work offers a viable and versatile solution to the anode design and in situ probing of potassium storage technologies that is readily promising for practical applications. 展开更多
关键词 TiO2 Potassium storage In situ TEM Plasma-enhanced CVD Graphene
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