Rational design of efficient visible-light photocatalysts(1D@2D/0D)ZnO@Ni-doped BiOBr/Bi heterojunction:Considerations on hierarchical structures,doping and SPR effect  

作　　者：Zhouzheng Jin Jingru Li Yiming Zhang Dan Liu Hui Ding Bhekie B.Mamba Alex T.Kuvarega Jianzhou Gui 

机构地区：[1]State Key Laboratory of Separation Membranes and Membrane Processes,Tianjin Key Laboratory of Green Chemical Technology and Process Engineering,and School of Material Science and Engineering,Tiangong University,Tianjin 300387,China [2]School of Chemical Engineering and Technology,Tiangong University,Tianjin 300387,China [3]School of Chemistry,Tiangong University,Tianjin 300387,China [4]School of Environmental Science and Engineering,Tianjin University,Tianjin,300072,China [5]University of South Africa,College of Science,Engineering and Technology,Nanotechnology and Water Sustainability Research Unit,Florida Science Campus 1710,South Africa

出　　处：《Journal of Materials Science & Technology》2022年第30期38-50,共13页材料科学技术（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.21576211);Tianjin Program of Science and Technology(No.21ZYJDJC00100);Tianjin Innovative Research Team in Universities(No.TD13-5031);Tianjin 131 Research Team of Innovative Talents。

摘　　要：Simultaneously integrating heterogeneous interface,element doping,and metal decorating was a promising strategy to promote the visible-light-driven photocatalytic activity.Herein,we demonstrated a facile solvothermal route for Ni-doped BiOBr/Bi^(0) with ZnO 3D hierarchical heterojunction(denoted as Z@B/BiNi).The optimal photocatalysts of Z@B/Bi-Ni sample presented a remarkable catalytic performance of high concentrations of tetracycline solution(40 mg/L)than those of the Z@B/Bi,Z@B,BOB and ZnO photocatalysts toward the visible-light-driven degradation.The enhanced photocatalytic mechanism can be proposed as follows:(ⅰ)3D hierarchical heterojunction provided more active sites and accelerated the separation of charge carriers for photocatalytic TC;(ⅱ)formation of oxygen vacancies on the surface over Z@B/Bi-Ni by in-situ reduction of Bi^(0) and Ni doping could serve as the active sites for oxygen activation to adsorb free O_(2) and generate more superoxide radicals;(ⅲ)SPR effect of Bi metal were beneficial to carrier separation and also act as the active site to trap O_(2) molecules.This work clarified the role of unique morphologies,surface plasmonic resonance(SPR)effect of metal Bi,and Ni doping in Z@B/Bi-Ni,and its photocatalytic reaction mechanism was proposed by a series of experiments,characterization and DFT calculations,arousing a new perspective to design hierarchical heterojunction photocatalysts.

关 键 词：Hierarchical heterojunction Oxygen vacancies Doping Ni SPR effect PHOTOCATALYSIS 

分 类 号：O643.36[理学—物理化学] O644.1[理学—化学] X703[环境科学与工程—环境工程]