Simultaneously integrating heterogeneous interface,element doping,and metal decorating was a promis-ing strategy to promote the visible-light-driven photocatalytic activity.Herein,we demonstrated a facile solvothermal route for Ni-doped BiOBr/Bi0 with ZnO 3D hierarchical heterojunction(denoted as Z@B/Bi-Ni).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 pho-tocatalysts 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 Bi0 and Ni doping could serve as the active sites for oxygen activation to adsorb free O2 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 O2 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.

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

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;School of Chemical Engineering and Technology,Tiangong University,Tianjin 300387,China;School of Chemistry,Tiangong University,Tianjin 300387,China;School of Environmental Science and Engineering Tianjin University,Tianjin,300072,China;University of South Africa,College of Science,Engineering and Technology,Nanotechnology and Water Sustainability Research Unit,Florida Science Campus 1710,South Africa

材料科学技术（英文版）

[1]Zhouzheng Jin;Jingru Li;Yiming Zhang;Dan Liu;Hui Ding;Bhekie B.Mamba;Alex T.Kuvarega;Jianzhou Gui-.Rational design of efficient visible-light photocatalysts(1D@2D/OD)ZnO@Ni-doped BiOBr/Bi heterojunction:Considerations on hierarchical structures,doping and SPR effect)[J].材料科学技术（英文版）,2022(30):38-50

tocatalysts

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