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Atomic Ni directional-substitution on ZnIn_(2)S_(4) nanosheet to achieve the equilibrium of elevated redox capacity and efficient carrier-kinetics performance in photocatalysis

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Journal of Energy Chemistry 2024年第1期88卷 272-281,I0007页

作者： Haibin Huang Guiyang Yu Xingze Zhao Boce Cui Jinshi Yu Chenyang Zhao Heyuan Liu Xiyou Li School of Materials Science and Engineering China University of Petroleum(East China)Qingdao 266580ShandongChina Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science(MOE) College of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042ShandongChina College of New Energy China University of Petroleum(East China)Qingdao 266580ShandongChina

It is a challenge to coordinate carrier-kinetics performance and the redox capacity of photogenerated charges synchronously at the atomic level for boosting photocatalytic ***,the atomic Ni was introduced into the lattice of hexagonal ZnIn_(2)S_(4) nanosheets(Ni/ZnIn_(2)S_(4))via directionalsubstituting Zn atom with the facile hydrothermal *** electronic structure calculations indicate that the introduction of Ni atom effectively extracts more electrons and acts as active site for subsequent reduction *** the optimized light absorption range,the elevation of Efand ECBendows Ni/ZnIn_(2)S_(4) photocatalyst with the increased electron concentration and the enhanced reduction ability for surface ***,ultrafast transient absorption spectroscopy,as well as a series of electrochemical tests,demonstrates that Ni/ZnIn_(2)S_(4) possesses 2.15 times longer lifetime of the excited charge carriers and an order of magnitude increase for carrier mobility and separation efficiency compared with pristine ZnIn_(2)S_(4).These efficient kinetics performances of charge carriers and enhanced redox capacity synergistically boost photocatalytic activity,in which a 3-times higher conversion efficiency of nitrobenzene reduction was achieved upon Ni/ZnIn_(2)S_(4).Our study not only provides in-depth insights into the effect of atomic directional-substitution on the kinetic behavior of photogenerated charges,but also opens an avenue to the synchronous optimization of redox capacity and carrier-kinetics performance for efficient solar energy conversion.

关键词： ZnIn_(2)S_(4) Substitution Carrier kinetics redox capacity Photocatalysis

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Nano-black carbon(biochar)released from pyrogenic carbonaceous matter as a super suspending agent in water/soil environments

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Biochar 2021年第1期3卷 1-3页

作者： Fei Lian Zhenyu Wang Baoshan Xing Institute of Environmental Processes and Pollution Control and School of Environment and Civil EngineeringJiangnan UniversityWuxi 214122China Stockbridge School of Agriculture University of MassachusettsAmherstMA 01003USA

Nano-black carbon(BC)is one of the most active fractions in the pyrogenic carbonaceous matter *** majority of recent studies mainly focus on the role of nano-BC in the global carbon ***,based on literature and our recent studies,we suggest that nano-BC may also serve as a super suspending agent,carrier,and redox mediator for sorbates during its migration from terrestrial to water bodies due to its unique properties such as high colloidal stability,strong sorption capacity,and high surface *** full implications of nano-BC in water/soil environments are far more than we ***,we call for more detailed investigations on the activity and reactivity of nano-BC in water/soil environments.

关键词： Biochar ·Nanoparticle Suspension Sorption redox capacity Biogeochemical processes

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