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Electronic properties of 2D materials and their junctions
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作者 Taposhree Dutta Neha Yadav +8 位作者 Yongling Wu Gary J.Cheng xiu liang Seeram Ramakrishna Aoussaj Sbai Rajeev Gupta Aniruddha Mondal Zheng Hongyu Ashish Yadav 《Nano Materials Science》 EI CAS CSCD 2024年第1期1-23,共23页
With an extensive range of distinctive features at nano meter-scale thicknesses,two-dimensional(2D)materials drawn the attention of the scientific community.Despite tremendous advancements in exploratory research on 2... With an extensive range of distinctive features at nano meter-scale thicknesses,two-dimensional(2D)materials drawn the attention of the scientific community.Despite tremendous advancements in exploratory research on 2D materials,knowledge of 2D electrical transport and carrier dynamics still in its infancy.Thus,here we highlighted the electrical characteristics of 2D materials with electronic band structure,electronic transport,dielectric constant,carriers mobility.The atomic thinness of 2D materials makes substantially scaled field-effect transistors(FETs)with reduced short-channel effects conceivable,even though strong carrier mobility required for high performance,low-voltage device operations.We also discussed here about factors affecting 2D materials which easily enhanced the activity of those materials for various applications.Presently,Those 2D materials used in state-of-the-art electrical and optoelectronic devices because of the extensive nature of their electronic band structure.2D materials offer unprecedented freedom for the design of novel p-n junction device topologies in contrast to conventional bulk semiconductors.We also,describe the numerous 2D p-n junctions,such as homo junction and hetero junction including mixed dimensional junctions.Finally,we talked about the problems and potential for the future. 展开更多
关键词 2D materials Electrical properties p-n junctions Mixed hereto junctions Homo junctions Electrical transport
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Nano-Au-decorated hierarchical porous cobalt sulfide derived from ZIF-67 toward optimized oxygen evolution catalysis:Important roles of microstructures and electronic modulation
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作者 Hongyu Gong Guanliang Sun +6 位作者 Wenhua Shi Dongwei Li Xiangjun Zheng Huan Shi xiu liang Ruizhi Yang Changzhou Yuan 《Carbon Energy》 SCIE EI CAS CSCD 2024年第5期1-14,共14页
Enhancing both the number of active sites available and the intrinsic activity of Co-based electrocatalysts simultaneously is a desirable goal.Herein,a ZIF-67-derived hierarchical porous cobalt sulfide decorated by Au... Enhancing both the number of active sites available and the intrinsic activity of Co-based electrocatalysts simultaneously is a desirable goal.Herein,a ZIF-67-derived hierarchical porous cobalt sulfide decorated by Au nanoparticles(NPs)(denoted as HP-Au@CoxSy@ZIF-67)hybrid is synthesized by low-temperature sulfuration treatment.The well-defined macroporous-mesoporous-microporous structure is obtained based on the combination of polystyrene spheres,as-formed CoxSy nanosheets,and ZIF-67 frameworks.This novel three-dimensional hierarchical structure significantly enlarges the three-phase interfaces,accelerating the mass transfer and exposing the active centers for oxygen evolution reaction.The electronic structure of Co is modulated by Au through charge transfer,and a series of experiments,together with theoretical analysis,is performed to ascertain the electronic modulation of Co by Au.Meanwhile,HP-Au@CoxSy@ZIF-67 catalysts with different amounts of Au were synthesized,wherein Au and NaBH4 reductant result in an interesting“competition effect”to regulate the relative ratio of Co^(2+)/Co^(3+),and moderate Au assists the electrochemical performance to reach the highest value.Consequently,the optimized HP-Au@CoxSy@ZIF-67 exhibits a low overpotential of 340 mV at 10 mA cm^(-2)and a Tafel slope of 42 mV dec-1 for OER in 0.1 M aqueous KOH,enabling efficient water splitting and Zn-air battery performance.The work here highlights the pivotal roles of both microstructural and electronic modulation in enhancing electrocatalytic activity and presents a feasible strategy for designing and optimizing advanced electrocatalysts. 展开更多
关键词 Au nanoparticles cobalt sulfide electronic modulation hierarchical porous structure oxygen evolution reaction
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Insight into role of Ni/Fe existing forms in reversible oxygen catalysis based on Ni-Fe single-atom/nanoparticles and N-doped carbon 被引量:5
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作者 Hong-Yu Gong xiu liang +8 位作者 Guan-liang Sun Dong-Wei Li Xiang-Jun Zheng Huan Shi Kai Zeng Guan-Chen Xu Yong Li Rui-Zhi Yang Chang-Zhou Yuan 《Rare Metals》 SCIE EI CAS CSCD 2022年第12期4034-4040,共7页
Oxygen catalysis reactions play essential roles in metal-air batteries,fuel cells,water electrolysis and artificial photosynthesis,with their development receiving significant attention in recent years.Understanding t... Oxygen catalysis reactions play essential roles in metal-air batteries,fuel cells,water electrolysis and artificial photosynthesis,with their development receiving significant attention in recent years.Understanding the structure-activity relationship plays an important role in the construction and performance optimization of reversible oxygen catalyst. 展开更多
关键词 catalyst CATALYSIS REVERSIBLE
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Deposition of In2O3 nanofibers on polyimide substrates to construct high-performance and flexible trimethylamine sensor
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作者 Yong Li Jiaqing Liu +3 位作者 Jingjing Zhang xiu liang Xingshuang Zhang Qi Qi 《Chinese Chemical Letters》 SCIE CAS CSCD 2020年第8期2142-2144,共3页
Flexible trimethylamine sensor has been realized based on In2 O3 nanofibers via electrospinning and a deposition technique.The web-like In2O3 nanofibers with high length-to-diameter ratios are benefit for gas adsorpti... Flexible trimethylamine sensor has been realized based on In2 O3 nanofibers via electrospinning and a deposition technique.The web-like In2O3 nanofibers with high length-to-diameter ratios are benefit for gas adsorption and desorption.High trimethylamine sensing properties are observed.The sensors can detect trimethylamine gas down to 1 ppm at 80℃with the response up to 3.8.Additionally,rapid response(6 s)and recovery(10 s)behavior can also be obtained.Good reliability and flexibility are observed in 100 bending/extending cycles.Our results open a new route to construct flexible gas sensors in practice. 展开更多
关键词 TRIMETHYLAMINE IN2O3 POLYIMIDE Flexible gas sensor
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