Hierarchical In_(2)S_(3)microflowers decorated with WO_(3)quantum dots:Sculpting S-scheme heterostructure for enhanced photocatalytic H_(2)evolution and nitrobenzene hydrogenation  

作　　者：Yuan Lin Lv Chen Jianhua Zhang Yunyun Gui Lijun Liu 

机构地区：[1]Hubei Key Laboratory of Biomass Fibers and Eco-dyeing&Finishing,College of Chemistry and Chemical Engineering,Wuhan Textile University,Wuhan 430200,China

出　　处：《Journal of Materials Science & Technology》2024年第7期218-225,共8页材料科学技术（英文版）

基　　金：funded by the Opening Project of Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention(LAP 3)(No.FDLAP21008);the Hubei Provincial Natural Science Foundation of China(No.2020CFB785);the Science and Tech-nology Research Project of the Education Department of Hubei Province(No.D20191703);the Project of Hubei Key Labora-tory of Biomass Fibers and Eco-dyeing&Finishing(WTU)(Nos.STRZ202219,STRZ202220).

摘　　要：Solar energy conversion and high-value chemical production are of utmost importance.However,the de-velopment of efficient photocatalysts with strong redox ability remains challenging.Here we report a unique 3D/0D In_(2)S_(3)/WO_(3)S-scheme heterojunction photocatalyst obtained by depositing WO_(3)quantum dots(QDs)onto hierarchical In_(2)S_(3)microflowers.The In_(2)S_(3)/WO_(3)composite exhibits outstanding visible light absorption,with a maximum optical response of up to 600 nm.The electronic interaction and charge separation at interfaces are explored by in situ X-ray photoelectron spectroscopy(XPS)and density func-tional theory(DFT)calculations.The difference in work function causes In_(2)S_(3)to donate electrons to WO_(3)upon combination,leading to the formation of an internal electric field(IEF)at the interfaces.Due to the IEF and bent energy bands,the transfer and separation of photogenerated charge carriers follow an S-scheme pathway within In_(2)S_(3)/WO_(3).Owing to the strong redox ability,spatial charge separation and lower H 2-generation barrier of S active sites,the optimized In_(2)S_(3)/WO_(3)heterojunctions show enhanced photocatalytic hydrogen evolution of 0.39 mmol h^(-1)g^(-1),6.7 times that of pristine In_(2)S_(3).In addition,the In_(2)S_(3)/WO_(3)S-scheme heterojunctions afford a remarkable activity for photocatalytic nitrobenzene hydro-genation with nearly 98%conversion and 99%selectivity of aniline within 1 h.Our work might present new insights into developing efficient S-scheme heterojunctions for various photocatalytic applications.

关 键 词：S-scheme heterojunctions In_(2)S_(3)microflowers WO_(3)quantum dots H_(2)production Electron transfer 

分 类 号：O643.36[理学—物理化学] O644.1[理学—化学] X505[环境科学与工程—环境工程]