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Nitrogen-rich carbon for catalytic activation of peroxymonosulfate towards green synthesis 认领 引用
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作者 Yu Yao Jinqiang Zhang +7 位作者 Yantao Wang Kunsheng Hu Yangyang Yang Zhongshuai Zhu Shuang Zhong Huayang Zhang Shaobin Wang Xiaoguang Duan 《Chinese Chemical Letters》 SCIE CAS CSCD 2024年第11期243-248,共6页
Nitrogen-doped carbon(N-C)materials have demonstrated exceptional performances in activating peroxymonosulfate(PMS)for environmental remediation.However,accommodating higher nitrogen contents remains challenging in N-... Nitrogen-doped carbon(N-C)materials have demonstrated exceptional performances in activating peroxymonosulfate(PMS)for environmental remediation.However,accommodating higher nitrogen contents remains challenging in N-C due to the thermodynamic instability of C-N skeleton.In this study,we proposed an innovative epitaxial growth approach to synthesize two-dimensional N-C nanosheets.Leveraging the abundant amino groups supplied by the polymer dots as growing sites,we successfully attained a high nitrogen level and spontaneously introduced abundant structural defects in the carbon framework.The resulting N-C nanosheets exhibited outstanding catalytic activity for the activation of PMS toward selective oxidation of diethyl 1,4-dihydro-2,6-dimethyl-3,5-pyridinedicarboxylate(1,4-DHP)into diethyl2,6-dimethylpyridine-3,5-dicarboxylate,which serves as a valuable intermediate in the synthesis of various pharmaceutical compounds.Comprehensive experimental and characterization investigations verified that the nitrogen sites and defects are the primary active sites for PMS activation and selective oxidation of 1,4-DHP.This work offered an efficient approach for the fabrication of high-nitrogen-loading carbon materials for catalytic oxidation reactions. 展开更多
关键词 Nitrogen-rich carbon Peroxymonosulfate Selective oxidation Electron transfer process Catalytic synthesis
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Nitrogen-rich metal-organic framework mediated Cu-N-C composite catalysts for the electrochemical reduction of CO2 认领 引用 被引量：4
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作者 Si-Min Cao Hua-Bo Chen +7 位作者 Bao-Xia Dong Qiu-Hui Zheng Yan-Xia Ding Meng-Jie Liu She-Liang Qian Yun-Lei Teng Zong-Wei Li Wen-Long Liu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2021年第3期555-563,共9页
Cu-based MOFs,i.e.,HKUST-1,etc.,have been pertinently chosen as the pristine materials for CO2 ER due to the unique ability of copper for generation hydrocarbon fuel.However,the limited conductivity and stability b... Cu-based MOFs,i.e.,HKUST-1,etc.,have been pertinently chosen as the pristine materials for CO2 ER due to the unique ability of copper for generation hydrocarbon fuel.However,the limited conductivity and stability become the stumbling-block that prevents the development of it.The exploring of MOFsderived M-C materials starts a new chapter for the MOFs precursors,which provides a remarkable electronic connection between carbon matrix and metals/metal oxides.N-doped M-N-C with extensive M-N sites scattering into the carbon matrix are more popular because of their impressive contribution to catalytic activity and specific product selectivity.Nevertheless,Cu-N-C system remained undeveloped up to now.The lack of ideal precursor,the sensitivity of Cu to be oxidized,and the difficulties in the synthesis of small size Cu nanoparticles are thus known as the main barriers to the development of Cu-N-C electrocatalysts.Herein,a nitrogen-rich Cu-BTT MOF is employed for the derivation of N-doped Cu-N-CT composite electrocatalysts by the pyrolyze method.High-temperature pyrolysis product of Cu-N-C1100exhibits the best catalytic activity for productions of CO(-0.6 V vs.RHE,jCO=0.4 mA/cm2)and HCOOH(-0.9 V vs.RHE,jHCOOH=1.4 mA/cm2). 展开更多
关键词 Carbon mono-oxide Formic acid Metal-organic framework Nitrogen-rich Copper nanoparticle Catalyst
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Decoration of carbon encapsulated nitrogen-rich MoxN with few-layered MoSe2 nanosheets for high-performance sodium-ion storage 认领 引用 被引量：4
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作者 Tao Lu Baoquan Liu +5 位作者 Fanyan Zeng Guo Cheng Shile Chu Meilan Xie Zhi Chen Zhaohui Hou 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2022年第11期332-340,I0009,共9页
Transition metal nitrides have become the focus of research in sodium ion batteries(SIBs)due to their unique metal properties and high theoretical capacity.However,the low actual capacity is still the main bottleneck ... Transition metal nitrides have become the focus of research in sodium ion batteries(SIBs)due to their unique metal properties and high theoretical capacity.However,the low actual capacity is still the main bottleneck for their application.Herein,using Mo-aniline frameworks as precursors,the carbon encapsulated nitrogen-rich MoxN is decorated by few-layered MoSe2 nanosheets(MoSe2@MoxN/C-I)after the facile calcinating,selenizing,and nitriding.The carbon encapsulation can effectively strengthen the structural stability of MoxN.The nitrogen-rich MoxN and decoration of few-layered MoSe2 can create rich heterointerfaces and extra active sites for rapid sodium-ion storage,thus promoting reaction kinetics and improving actual capacity.The MoSe2@MoxN/C-I as an anode achieves a large reversible capacity of 522.8 mAh g-1at 0.1 A g-1,and 254.3 mAh g-1capacity is obtained after 6000 cycles at 5.0 A g-1,showing signally improved sodium-ion storage properties.The storage mechanisms and kinetic behaviors are described systematically via the advanced testing techniques and density functional theory(DFT)calculations.It is found that the nitrogen-rich MoxN as the substrate is the basis of long cycling stability,and the few-layered MoSe2 are the key to improving actual capacity.This work indicates that the decoration of few-layered selenides has a broad application prospect in high-performance metal-ion batteries. 展开更多
关键词 Few-layered MoSe2nanosheets Decoration Carbon encapsulation Nitrogen-rich MoxN Sodium ion batteries
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Alkylene-functionality in bridged and fused nitrogen-rich poly-cyclic energetic materials:Synthesis,structural diversity and energetic properties 认领 引用 被引量：2
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作者 Man Xu Nanxi Xiang +2 位作者 Ping Yin Qi Lai Siping Pang 《Defence Technology（防务技术）》 SCIE EI CAS CSCD 2024年第5期18-46,共29页
From the standpoint of chemical structures,the organic backbones of energetic materials can be classified into aromatic rings,nonaromatic rings,and open chains.Although the category of aromatic energetic compounds exh... From the standpoint of chemical structures,the organic backbones of energetic materials can be classified into aromatic rings,nonaromatic rings,and open chains.Although the category of aromatic energetic compounds exhibits several advantages in the regulation of energetic properties,the nonaromatic heterocycles,assembling nitramino explosophores with simple alkyl bridges,still have prevailed in benchmark materials.The methylene bridge plays a pivotal role in the constructions of the classic nonaromatic heterocycle-based energetic compounds,e.g.,hexahydro-1,3,5-trinitro-1,3,5-triazine(RDX)and octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine(HMX),whereas ethylene bridge is the core moiety of state-of-the-art explosive 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane(CL-20).In this context,it is of great interest to employ simple and practical bridges to assemble aromatic and nonaromatic nitrogen-rich heterocycles,thereby expanding the structural diversity of energetic materials,e.g.,bridged and fused nitrogen-rich poly-heterocycles.Furthermore,alkyl-bridged poly-heterocycles highlight the potential for the open chain type of energetic materials.In this review,the development of alkyl bridges in linking nitrogen-rich heterocycles is presented,and the perspective of the newly constructed energetic backbones is summarized for the future design of advanced energetic materials. 展开更多
关键词 Energetic materials Alkyl bridge strategy Nitrogen-rich azoles Fused heterocycles Azoles
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Nitrogen-rich hierarchically porous carbon foams as high-performance electrodes for lithium-based dual-ion capacitor 认领 引用 被引量：3
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作者 Yue Chen Xiaoming Qiu Li-Zhen Fan 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2020年第9期187-194,I0006,共8页
Nitrogen-rich porous carbonaceous materials have shown great potential in energy storage and conversion applications due to their facile fabrication,high electronic conductivity,and improved hydrophilic property.Herei... Nitrogen-rich porous carbonaceous materials have shown great potential in energy storage and conversion applications due to their facile fabrication,high electronic conductivity,and improved hydrophilic property.Herein,three-dimensional porous N-rich carbon foams are fabricated through a one-step carbonization-activation method of the commercial melamine foam,and displaying hierarchically porous structure(macro-,meso-,and micro-pores),large surface area(1686.5 m2 g^-1),high N-containing level(3.3 at%),and excellent compressibility.The as-prepared carbon foams as electrodes for quasi-solid-state supercapacitors exhibit enhanced energy storage ability with 210 F g^-1 and 2.48c at 0.1 A g^-1,and150 F g^-1 and 1.77 F cm^-2 at 1 A g^-1,respectively.Moreover,as an electrode for lithium-based dual-ion capacitor,this distinctive porous carbon also delivers remarkable specific capacitance with 143.6 F g^-1 at0.1 A g^-1 and 116.2 F g^-1 at 1 A g^-1.The simple preparation method and the fascinating electrochemical performance endow the N-rich porous carbon foams great prospects as high-performance electrodes for electrochemical energy storage. 展开更多
关键词 Nitrogen-rich Carbon foam Hierarchically porous structure Dual-ion capacitor
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Perforated nitrogen-rich graphene-like carbon nanolayers supported Cu-In catalyst for boosting CO2 electroreduction to CO 认领 引用 被引量：1
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作者 Xinxin Zhang Yuxiao Zhu +6 位作者 Ziyong Liu Fuli Li Wei Zhou Zichao Dong Jingxin Fan Licheng Liu Chunhua Du 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2022年第12期383-390,I0010,共8页
The combination of a powerful CO2-enriching carrier and robust active component provides a new idea for the construction of efficient catalysts for electrocatalytic CO2reduction.Herein,novel perforated nitrogen-... The combination of a powerful CO2-enriching carrier and robust active component provides a new idea for the construction of efficient catalysts for electrocatalytic CO2reduction.Herein,novel perforated nitrogen-rich graphene-like carbon nanolayers(PNGC)are prepared from biomass derivatives,which promotes the oriented deposition of In-doped Cu2(OH)3(NO3)nanosheet patches.A robust Cu-In/PNGC composite catalyst is then obtained via simple in-situ electrochemical reduction.Unsurprisingly,CuIn/PNGC exhibits a CO Faradaic efficiency(FECO)of 91.3%and a remarkable CO partial current density(jCO)of 136.4 m A cm-2at a moderate overpotential of 0.59 V for electrocatalytic CO2reduction reaction(CO2RR).DFT calculations and experimental studies indicate that the strong carrier effect of PNGC makes PNGC carried Cu-In nanosheets improved the adsorption capacity of CO2gas,reconfigured electronic structure,and reduced free energy of key intermediate formation,thereby the CO2activation and conversion are promoted. 展开更多
关键词 CO2electroreduction CO Cu-In/PNGC Patch Perforated nitrogen-rich graphene-like carbon nanolayers
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Thermal Behavior,Sensitivity,Detonation Velocity and Pressure of a Nitrogen-Rich Compound 认领 引用
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作者 Zhiyue Han Yupeng Zhang +3 位作者 Zhiming Du Zengyi Li Yuezhen Yang Qian Yao 《Journal of Beijing Institute of Technology》 EI CAS 2017年第3期311-317,共7页
The nitrogen content of tetrazolo triazines is 68.9%.In this paper,tetrazolotriazines was synthetized.The TG-DSC test indicated its decomposition process in detail.The non-isothermal kinetic parameters were speculated... The nitrogen content of tetrazolo triazines is 68.9%.In this paper,tetrazolotriazines was synthetized.The TG-DSC test indicated its decomposition process in detail.The non-isothermal kinetic parameters were speculated by Kissinger and Ozawa methods.It revealed the mechanism function of thermal decomposition.The impact and friction sensitivity were tested.The detonation pressure and velocity were calculated.It has a wide range of potential applications as a kind of energetic material. 展开更多
关键词 nitrogen-rich compounds thermal analysis activation energy mechanism function detonation pressure and velocity
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Split Addition of Nitrogen-Rich Substrate at Thermophilic and Mesophilic Stages of Composting: Effect on Green House Gases Emission and Quality of Compost 认领 引用
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作者 Boakye Acheampong Kodwo Miezah +2 位作者 Enoch Bessah Benedicta Essel Ayamba Francis Kemausour 《Open Journal of Soil Science》 2024年第2期133-158,共26页
Composting as a solution to the increasing generation of municipal solid waste (MSW), also contribute to GHGs emission when not controlled and could lack some basic nutrients, especially nitrogen. This study assessed ... Composting as a solution to the increasing generation of municipal solid waste (MSW), also contribute to GHGs emission when not controlled and could lack some basic nutrients, especially nitrogen. This study assessed the split-additions of nitrogen-rich substrate to composting materials and their effect on GHGs emissions as well as the quality of the composts. Nitrogen-rich substrates formulated from pig and goat manure were co-composted with MSW for a 12-weeks period by split adding at mesophilic (˚C) and thermophilic (>50˚C) stages in five different treatments. Representative samples from the compost were taken from each treatment for physicochemical, heavy metals and bacteriological analysis. In-situ CH4, CO2, N2O gas emissions were also analyzed weekly during composting. It was observed that all the treatments showed significant organic matter decomposition, reaching thermophilic temperatures in the first week of composting. The absence affects the suitable agronomic properties. All nitrogen-rich substrate applied at thermophilic stage (Treatment two) recorded the highest N, P and K concentrations of 1.34%, 0.97% and 2.45%, respectively with highest nitrogen retention. In terms of GHG emissions, CO2 was highest at the thermophilic stage when N-rich substrate was added in all treatment, while CH4 was highest in the mesophilic stage with N-rich substrate addition. N2O showed no specific trend in the treatments. Split addition of the N-rich substrate for co-composting of MSW produced compost which is stable, has less nutrient loss and low GHG emissions. Split addition of a nitrogen-rich substrate could be an option for increasing the fertilizer value of MSW compost. 展开更多
关键词 Compost Nitrogen-Rich Substrate Thermophilic Mesophilic Greenhouse Gas Emissions
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Structure Investigation of a Novel Nitrogen-rich Energetic Complex Tetrammine-cis- bis ; 5-nitro-2 H-tetrazole-N2 ) Cobalt; hi) Perchlorate Dihydrate 认领 引用
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《含能材料》 CAS CSCD 北大核心 2011年第1期119-120,共2页
Energetic coordination compound with 5-nitro-tetrazole （NT） as ligand has gained more and more attentions due to its extreme explosive properties and ecological friendly pyrolysis productsF1-61 The research results ... Energetic coordination compound with 5-nitro-tetrazole （NT） as ligand has gained more and more attentions due to its extreme explosive properties and ecological friendly pyrolysis productsF1-61 The research results in 1994 proposed from Sandia National Laboratories proves tetrammine-cis-bis （5-nitro-2H-tetrazole-N2 ） cobalt （ Ⅲ ） perchlorate （BNCP） to be a more powerful explosive and undergoes deflagration-to- detonation （DDT） 展开更多
关键词 高氯酸盐 爆炸物 含哨基 高温分解
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Planting nitrogen-rich motif into porous aromatic frameworks to boost redox potential and multi-ion storage for wide-temperature sodium-organic batteries 认领 引用
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作者 Mimi Zhang Linqi Cheng +3 位作者 Zhaoli Liu Fengchao Cui Fang Luo Heng-Guo Wang 《Science China Chemistry》 SCIE EI CAS CSCD 2026年第2期979-985,共7页
Redox-active porous aromatic frameworks(PAFs)have emerged as hopeful candidates for sodium-ion batteries(SIBs)in view of their porous structures,chemical stability and tunable architectures.Herein,we successfully synt... Redox-active porous aromatic frameworks(PAFs)have emerged as hopeful candidates for sodium-ion batteries(SIBs)in view of their porous structures,chemical stability and tunable architectures.Herein,we successfully synthesized two redox-active PAFs(PAF-305 and PAF-306)with different nitrogen-containing motifs,and demonstrated their application as cathode materials for SIBs.Density functional theory(DFT)calculations reveal that nitrogen-rich PAF-305 exhibits a lower lowest unoccupied molecular orbital(LUMO)energy level(-3.35 eV)and a narrower energy gap(Eg)(2.40 eV)compared with nitrogen-poor PAF-306.As expected,PAF-305 displays outstanding electrochemical performance,comprising a high reversible capacity of 145.2 mAh g-1at 0.05 A g-1and satisfactory cycling stability with 92% capacity retention over 1000 cycles at 0.2 A g-1.Remarkably,PAF-305 maintains robust electrochemical properties across a wide temperature range(-20℃ to 50℃).Through a combination of experimental characterizations and theoretical calculations,the sodium-ion storage mechanism of PAF-305 is elucidated.This study not only provides a promising strategy for exploring other redox-active organic units in the design of novel PAFs,but also expands the potential applications of PAFs in energy storage systems. 展开更多
关键词 porous aromatic framework nitrogen-rich motif multi-ion storage wide temperature sodium-organic batteries
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Constructing nitrogen-rich clover-like covalent organic frameworks for effective iodine capture 认领 引用
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作者 Lingli Zhang Songsong Zhang +1 位作者 Li Wang Feng Luo 《Science China Materials》 SCIE EI CAS CSCD 2025年第11期4164-4172,共9页
Covalent organic frameworks(COFs)are promising candidates for the rapid purification of toxic pollutants and mitigation of radioactive iodine leakage in nuclear accidents.In particular,COFs constructed from meta-posit... Covalent organic frameworks(COFs)are promising candidates for the rapid purification of toxic pollutants and mitigation of radioactive iodine leakage in nuclear accidents.In particular,COFs constructed from meta-position monomers can form clover-like morphology,increasing the specific surface area and providing multidimensional diffusion pathways for iodine.Herein,two nitrogen-rich COFs(DFPT-COF and DFPB-COF)featuring well-defined cloverlike nanochannels were successfully fabricated,demonstrating exceptional iodine capture performance.Compared to DFPB-COF,DFPT-COF exhibits better iodine capture performance(5.58 g g−1for I2vapor)due to its large specific surface area and rich nitrogen adsorption sites.Moreover,the adsorption dynamics of DFPT-COF for liquid iodine follow a pseudosecond-order kinetic model and the adsorption isotherm model complies with the Langmuir model.Notably,DFPT-COF exhibited excellent renewable adsorption performance,suggesting its potential as a sustainable and efficient green adsorbent for iodine in nuclear waste management. 展开更多
关键词 covalent organic frameworks clover-like nitrogen-rich I2adsorption radioiodine extraction
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Ultra heat-resistant hydrogen-bonded organic framework:Breaking the thermal stability limit of high-energy materials 认领 引用 被引量：3
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作者 Bojun Tan Jinkang Dou +13 位作者 Jing Zhang Xiong Yang Jiatong Ren Changwei Tang Jian Su Gen Zhang Siwei Song Qinghua Zhang Binghui Duan Hongchang Mo Minghui Xu Xianming Lu Bozhou Wang Ning Liu 《Defence Technology（防务技术）》 SCIE EI CAS CSCD 2026年第3期300-306,共7页
The pursuit of heat-resistant energetic materials(HREMs)with thermal stability beyond 450℃ presents a significant challenge that has yet to be achieved.In this work,we develop an innovative electronic delocalization ... The pursuit of heat-resistant energetic materials(HREMs)with thermal stability beyond 450℃ presents a significant challenge that has yet to be achieved.In this work,we develop an innovative electronic delocalization strategy to design and synthesize a planar dizwitterionic diamino-bistriazolotetrazine,designated as TYX-1.The unique structural feature of TYX-1,including a nitrogen-rich fused ring system,planar conformation,and dizwitterionic configuration,combined with its hydrogen-bonded organic framework(HOF)structure,confer exceptional thermal stability(The onset temperature is 428℃,and the peak temperature is 473℃),high density(1.84 g/cm3),and remarkable detonation performance(detonation velocity:8616 m/s).Furthermore,TYX-1 exhibits an impressive insensitivity(impact sensitivity>40 J;friction sensitivity>360 N),surpassing all previously reported HREMs.Theoretical calculations and single-crystal clearly indicate that the delocalizedπelectrons within the dizwitterionic bistriazolotetrazine rings and the HOF structure of TYX-1 are pivotal in ensuring its high thermal stability and high energy density.The discovery of TYX-1 marks a significant advancement in the field of HREMs and is anticipated to catalyze substantial progress in various high-temperature applications reliant on energetic materials. 展开更多
关键词 Ultra heat-resistant energetic materials Hydrogen-bonded organic framework A planar dizwitterionic structure Nitrogen-rich fused-ring skeleton
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Synthesis of Microporous Nitrogen-Rich Covalent-Organic Framework and Its Application in CO2 Capture 认领 引用 被引量：7
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作者 Qiang Gao Linyi Bai +5 位作者 Xiaojing Zhang Peng Wang Peizhou Li Yongfei Zeng Ruqiang Zou Yanli Zhao 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2015年第1期90-94,共5页
An imine-based nitrogen-rich covalent-organic framework(COF)was successfully synthesized using two tri-angular building units under solvothermal reaction condition.The gas adsorption properties of the obtained micro-p... An imine-based nitrogen-rich covalent-organic framework(COF)was successfully synthesized using two tri-angular building units under solvothermal reaction condition.The gas adsorption properties of the obtained micro-porous nitrogen-rich COF were investigated.The results indicated that the activated COF material presented good up take capabilities of CO2 and CH4 at 61.2 and 43.4 cm3·g−1at 1 atm and 273 K,respectively,showing its applica-tion potential in selective gas capture and separation. 展开更多
关键词 CO2capture covalent-organic frameworks crystalline structure microporous materials nitrogen-rich
Covalent interfacial coupling of vanadium nitride with nitrogen-rich carbon textile boosting its lithium storage performance as binder-free anode 认领 引用 被引量：1
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作者 Di Zhao Jinwen Qin +3 位作者 Lirong Zheng Donglei Guo Jie Wang Minhua Cao 《Nano Research》 SCIE EI CSCD 2021年第11期4336-4346,共11页
Eliminating the usage of metal current collectors and binders in traditional battery electrode configuration is an effective strategy to significantly improve the capacities of lithium ion batteries (LIBs). Herein, we... Eliminating the usage of metal current collectors and binders in traditional battery electrode configuration is an effective strategy to significantly improve the capacities of lithium ion batteries (LIBs). Herein, we demonstrate the construction of porous vanadium nitride (VN) nanosheet network in situ grown on nitrogen-rich (N-rich) carbon textile (N-C@P-VN) as lightweight and binder-free anode for LIBs. The N-rich carbon textile is used both as the current collector and host to store Li+, thus improving the specific capacities of binder-free VN anode and meanwhile reducing the inert mass of the whole cell. Moreover, the open spaces in carbon textile and vertically aligned pores in VN nanosheet network can not only provide an expressway for Li+ and e− transport, but also afford more active sites. As a result, the binder-free N-C@P-VN anode maintains a specific capacity of 1,040 mAh·g−1 (or an areal capacity of 2.6 mAh·cm−2) after 100 cycles at 0.1 mA·cm−2 in half cell. Moreover, in an assembled N-C@P-VN//LiFePO4 full cell, it exhibits an areal capacity of 1.7 mAh·cm−2 after 300 cycles at 0.1 C. The synergistic strategy of N-C substrate and porous VN network could be applied to guide rational design of similar N-C@nitride or sulfide hybrid systems with corresponding sulfur-doped carbon textile as the substrate. 展开更多
关键词 vanadium nitride nitrogen-rich carbon textile covalent interface Li ion battery binder-free anode
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Fe掺杂g-C3N5活化过二硫酸盐光催化降解RhB 认领 引用 被引量：1
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作者 刘思乐 李佳 +1 位作者 韩悦 单译 《印染》 CAS 北大核心 2026年第4期70-74,共5页
通过沉淀煅烧法制备了Fe掺杂富氮石墨相氮化碳光催化剂(Fe/g-C3N5),并采用X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)、紫外可见漫反射光谱(UV-vis DRS)、稳态荧光光谱(PL)和电化学交流阻抗谱(EIS)等方法对Fe/g-C3N5光... 通过沉淀煅烧法制备了Fe掺杂富氮石墨相氮化碳光催化剂(Fe/g-C3N5),并采用X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)、紫外可见漫反射光谱(UV-vis DRS)、稳态荧光光谱(PL)和电化学交流阻抗谱(EIS)等方法对Fe/g-C3N5光催化剂的物相晶型、微观形貌、能带结构、光电子-空穴复合情况和导电性进行表征。以罗丹明B(RhB)为模拟污染物,研究了可见光照射下Fe/g-C3N5活化过二硫酸盐(PDS)的光催化活性和循环使用稳定性,并通过活性基团捕获试验探究了光催化体系中活性基团的作用。结果表明:Fe/g-C3N5光催化剂呈堆叠的纳米片结构;Fe/g-C3N5活化PDS可见光体系照射60 min,RhB染液的光催化降解率达到95.9%,循环使用5次后仍具有良好的光催化活性。活性基团捕获结果表明,体系中的主要活性基团为h+、・OH和・SO4-。 展开更多
关键词 Fe/g-C3N5 光催化 富氮石墨相氮化碳 过二硫酸盐 罗丹明B
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C3N5/Bi2WO6复合材料的制备及对罗丹明B的光催化降解 认领 引用
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作者 尚冬梅 陆姗姗 +3 位作者 崔乐乐 刘思乐 周慧馨 王俊卜 《印染》 CAS 北大核心 2026年第6期55-61,共7页
采用水热法制备富氮氮化碳/钨酸铋(C3N5/Bi2WO6)复合材料,并通过多种表征手段分析了其物相晶型、特征基团、元素组成、光化学和电化学性质。通过模拟可见光下罗丹明B(RhB)的光催化降解反应评价复合材料的光催化性能和稳定性... 采用水热法制备富氮氮化碳/钨酸铋(C3N5/Bi2WO6)复合材料,并通过多种表征手段分析了其物相晶型、特征基团、元素组成、光化学和电化学性质。通过模拟可见光下罗丹明B(RhB)的光催化降解反应评价复合材料的光催化性能和稳定性,并分析了光催化性能的增强机制。结果表明:C3N5和Bi2WO6之间Z型异质结的构建实现了光电子和空穴的高效分离,扩展了可见光响应范围,有效保留了Bi2WO6价带位置高氧化活性的空穴和C3N5导带位置高还原活性的光电子,增强了光催化性能。模拟可见光照射60 min,C3N5/Bi2WO6复合材料对RhB的降解率达到99.52%,表观速率常数分别是C3N5和Bi2WO6的13倍和7倍,展现出优异的光催化性能。C3N5/Bi2WO6复合材料经过5次光催化循环后对RhB的降解率仍保持在97.33%,表现出良好的稳定性。活性物种捕获试验表明,光催化降解反应中超氧自由基(·O-)和羟基自由基(·OH)起到主导作用。 展开更多
关键词 复合材料 光催化降解 钨酸铋 富氮氮化碳 Z型异质结 罗丹明B
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WO3/C3N5复合光催化剂的制备及光催化降解刚果红 认领 引用
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作者 陆姗姗 尚冬梅 +2 位作者 韩悦 刘思乐 王建忠 《印染》 CAS 北大核心 2026年第3期61-67,共7页
通过蒸发溶剂-高温煅烧法制备了三氧化钨/富氮氮化碳(WO3/C3N5)复合光催化剂,采用XRD、FT-IR、XPS、SEM、TEM、UV-vis DRS和PL等方法对复合光催化剂的物相晶型、化学组成、元素组成、微观形貌、光谱吸收响应和光生载流子分离... 通过蒸发溶剂-高温煅烧法制备了三氧化钨/富氮氮化碳(WO3/C3N5)复合光催化剂,采用XRD、FT-IR、XPS、SEM、TEM、UV-vis DRS和PL等方法对复合光催化剂的物相晶型、化学组成、元素组成、微观形貌、光谱吸收响应和光生载流子分离效率等进行表征。以刚果红(CR)染料作为目标污染物,评价了WO3/C3N5复合光催化剂的光催化活性、稳定性和底物普适性,研究了常见无机盐离子(HCO3-、NO3-和SO42-)共存对光催化活性的影响和活性物种的作用。结果表明:WO3/C3N5复合光催化剂表现出优异的光催化活性,其对CR染料降解率最高达到98.72%,明显高于单一材料WO3和C3N5。优异的光催化活性得益于Z型异质结的构建,提高了光生载流子分离效率,有效抑制了光电子和空穴的重组。WO3/C3N5复合光催化剂5次循环后对CR染料的降解率依然保持在97.90%,表现出良好的稳定性。活性物种猝灭结果表明CR染料降解过程中·O2-和·OH起到主导作用。 展开更多
关键词 富氮氮化碳 三氧化钨 复合光催化剂 光催化降解 异质结 刚果红
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基于富氮席夫碱网络聚合物的混合基质膜及其CO2分离性能 认领 引用
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作者 陈晗 牛宏霞 +2 位作者 张新儒 王永洪 文海荣 《化工学报》 EI CAS CSCD 北大核心 2026年第5期2637-2650,共14页
通过在聚合物基质中引入多孔材料制备的混合基质膜,兼具多孔材料和基质的优点,其在气体分离领域展现出良好的应用前景。为了获得高性能的气体分离膜,以三聚氰胺和盐酸胍为胺基单体,对苯二甲醛为醛基单体,通过席夫碱反应制备富氮席夫碱... 通过在聚合物基质中引入多孔材料制备的混合基质膜,兼具多孔材料和基质的优点,其在气体分离领域展现出良好的应用前景。为了获得高性能的气体分离膜,以三聚氰胺和盐酸胍为胺基单体,对苯二甲醛为醛基单体,通过席夫碱反应制备富氮席夫碱网络聚合物(GH-SNW-1)。随后,将GH-SNW-1加入到聚乙烯胺(PVAm)中制备铸膜液,将其涂覆在亲水改性聚砜支撑体(mPSf)表面制备得混合基质复合膜。利用XPS、XRD和BET表征GH-SNW-1的化学和孔隙结构,通过SEM分析膜的形态结构。此外,探究了GH-SNW-1合成条件、膜制备工艺参数和不同测试条件对气体分离性能的影响。研究表明,相较于SNW-1,GH-SNW-1在膜中的最优含量升至15%(质量),这表明胍基的加入增强了GH-SNW-1与膜基质间的相容性。在此负载量下,PVAm/GHSNW-1膜气体分离性能最优:CO2渗透速率和CO2/N2选择性分别为623 GPU和80,超越了2008年Robeson上限。这归因于GH-SNW-1的高孔隙率为CO2提供了快速传输通道,同时胺基和胍基位点协同促进了CO2的快速传递。此外,在360 h的混合气稳定性测试中,该膜表现出优异的稳定性,其CO2平均渗透速率和CO2/N2选择性分别为771 GPU和88。 展开更多
关键词 混合基质复合膜 气体 分离 二氧化碳捕集 富氮网络聚合物 传递过程
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含氮废液回用对不同碳氮比物料好氧发酵性能的影响 认领 引用
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作者 张靖敏 谢栋 +3 位作者 唐士钊 马汭川 高明 吴川福 《环境工程》 CAS CSCD 2026年第7期129-142,共14页
减少发酵过程中的氨排放并回收损失的氮素,是提高堆肥产品中氮含量的有效手段.生物滴滤塔作为末端臭气控制技术,在净化含氨臭气的同时,可将臭气中的氮(主要为NH3)以无机氮的形式保留在滴滤废液中,含氮滴滤液的回用为回收损失氮素提... 减少发酵过程中的氨排放并回收损失的氮素,是提高堆肥产品中氮含量的有效手段.生物滴滤塔作为末端臭气控制技术,在净化含氨臭气的同时,可将臭气中的氮(主要为NH3)以无机氮的形式保留在滴滤废液中,含氮滴滤液的回用为回收损失氮素提供了可能.然而,在适宜碳氮比(C/N)范围内(20.0∶1~30.0∶1),含氮废液回用对好氧发酵过程的影响尚不明确.研究以沼渣、木屑、餐厨垃圾及菌糠为堆肥原料,初始物料C/N为控制变量,设置了低C/N堆料回用含氮废液组(LRN)、低C/N堆料回用去离子水组(LRW)、高C/N堆料回用含氮废液组(HRN)、高C/N堆料回用去离子水组(HRW)4个实验组,重点考察模拟含氮废液(含2000 mg/L NH4+-N和2000 mg/L NO2--N)回用对好氧发酵腐殖化程度、氮素转化以及温室气体排放的影响.结果表明,含氮废液回用不会对堆肥产品的最终腐熟程度产生抑制,最终堆肥产品的pH及种子发芽指数均符合有机肥料国家标准.此外,HRN组的总温室气体、N2O及NH3累积排放量较LRN组和对照组(LRW组),分别降低20.32%~30.35%、0.67%~53.38%和52.14%~62.15%.尽管HRN组的总温室气体和NH3累积排放量略高于HRW组(提高4.56%和4.99%),但HRN组的最终堆肥产品中的氮含量(4691.27 mg/kg)高于HRW组(4514.96 mg/kg),这主要归因于高C/N条件下充足的碳源促进了微生物对氮的同化固定.与之相反,低C/N条件下回用含氮废液,由于碳源不足导致NH4+-N积累挥发及反硝化过程不完全,加剧了NH3与N2O排放,LRN组较LRW组分别提高26.43%和112.99%.综上,在高初始物料C/N条件下回用含氮废液,可在保证堆肥产品腐熟度基础上,有效降低堆肥过程的温室气体及NH3的排放. 展开更多
关键词 有机废弃物 堆肥 碳氮比 含氮废液 氮转移
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富氮氮化碳负载银催化剂的制备及催化糠醛加氢性能研究 认领 引用
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作者 杨帆 尚冬梅 +2 位作者 陆姗姗 王俊卜 裴东升 《化学工程师》 CAS 2026年第3期11-15,48,共5页
通过混合煅烧法制备了富氮氮化碳负载银(Ag/C3N5)催化剂,采用X射线衍射(XRD)、紫外-可见漫反射光谱(UV-vis DRS)、光致发光光谱(PL)和电化学交流阻抗(EIS)等技术手段对催化剂的物相晶型、光谱吸收响应特性及光生载流子重组与分离... 通过混合煅烧法制备了富氮氮化碳负载银(Ag/C3N5)催化剂,采用X射线衍射(XRD)、紫外-可见漫反射光谱(UV-vis DRS)、光致发光光谱(PL)和电化学交流阻抗(EIS)等技术手段对催化剂的物相晶型、光谱吸收响应特性及光生载流子重组与分离行为等进行了表征。考察了贵金属Ag负载量、催化剂用量、反应温度、反应时间和溶剂种类对糠醛加氢性能的影响。结果表明,贵金属Ag负载到C3N5表面形成肖特基异质结,诱导产生等离子体共振效应,拓宽了光谱吸收范围,有效抑制了光生载流子的重组,提高了催化加氢性能。在去离子水为溶剂,3.0%Ag/C3N5催化剂用量为35mg,反应温度为100℃,反应时间为3.5h和H2压力为1.0MPa的最优工艺条件下,糠醛转化率和糠醇收率最高分别达到了98.92%和95.61%,糠醇的选择性达到了96.65%。该催化剂循环使用5次后,仍表现出优异的糠醛加氢催化活性。 展开更多
关键词 富氮氮化碳 单质银 催化剂 糠醛加氢 糠醇
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