Fabrication of MXene-Bi_(2)WO_(6)heterojunction by Bi_(2)Ti_(2)O_(7)hinge for extraordinary LED-light-driven photocatalytic performance  

作　　者：Zhiwen Li Liangliang Xu Zaheer Ud Din Babar Ali Raza Yifei Zhang Xinrui Gu Yu-Xin Miao Zhen Zhao Gao Li 

机构地区：[1]Institute of Catalysis for Energy and Environment,College of Chemistry and Chemical Engineering,Shenyang Normal University,Shenyang 110034,China [2]State Key Laboratory of Catalysis,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China [3]Scuola Superiore Meridionale(SSM),University of Naples Federico II,Largo S.Marcellino,10,80138,Italy [4]Department of Chemical and Biomolecular Engineering,Korea Advanced Institute of Science and Technology(KAIST),Daejeon 34141,Republic of Korea [5]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Nano Research》2024年第6期4729-4736,共8页纳米研究（英文版）

基　　金：the National Natural Science Foundation of China(Nos.22172167 and 22272112).

摘　　要：Heterojunction composites with intimate interfaces can shorten the diffusion distance,which leads to a shorter path for photogenerated carriers,thereby increasing photocatalytic activity.Herein,we report the fabrication of Ti_(3)C_(2)-Bi_(2)WO_(6)(TC-BW)heterojunctions hinged by Bi_(2)Ti_(2)O_(7)joints via an in situ hydrothermal reaction of Ti_(3)C_(2)in the presence of Na_(2)WO_(4)and Bi(NO_(3))_(3).The TC-BW was characterized using X-ray diffraction(XRD),scanning transmission electron microscopy(STEM),and Raman spectroscopy.TC-BW showed superior photocatalytic activity(productivity over 15TC-WB reaches up to 5.0 mmolreacted BA·gcat.^(−1)·h^(−1))in the oxidation of benzyl alcohol using light-emitting diode(LED)light,arising from the surface defects and intimate heterojunction interface between the Ti_(3)C_(2)MXene and Bi_(2)WO_(6)nanosheets.TC-BW heterojunctions provide an enhanced separation efficiency of photogenerated charges,which in turn yields superior photocatalytic activity.Furthermore,it is well substantiated by density functional theory(DFT)calculations.In summary,this study elucidates the preparation of heterojunction composites with intimate interfaces for highly efficient photooxidation.

关 键 词：MXene-Bi_(2)WO_(6) HETEROJUNCTION LED-light-driven photocatalysis Bi_(2)Ti_(2)O_(7) photooxidation 

分 类 号：O643.3[理学—物理化学]