In situ silver clusters decorated Bi_(24)O_(31)Cl_(10)nanorods for boosting photo-thermal catalytic activities  

作　　者：Yunxiang Zhang Yu Wang Chenliang Zhou Hazem Abdelsalam Wei Chen Li Huang Zhichao Mu Zhili Chen Diab Khalafallah Qinfang Zhang 

机构地区：[1]School of Materials Science and Engineering,Yancheng Institute of Technology,Yancheng 224051,China [2]Key Laboratory for Ecological-Environment Materials of Jiangsu Province,Yancheng Institute of Technology,Yancheng 224051,China [3]Theoretical Physics Department,National Research Centre,El-Buhouth Str.,12622,Dokki,Giza,Egypt [4]Mechanical Design and Materials Department,Faculty of Energy Engineering,Aswan University,P.O.Box 81521,Aswan,Egypt

出　　处：《Journal of Materials Science & Technology》2024年第23期236-247,共12页材料科学技术（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.12274361);Natural Science Foundation of Jiangsu Province(No.BK20211361);Postgraduate Research&Practice Innovation Program of Jiangsu Province(No.KYCX21_3145);school-level research projects of Yancheng Institute of Technology(Nos.xjr2019028 and xjr2019059).

摘　　要：High photogenerated carrier recombination rate and weak spectral response are the two main factors restricting photocatalytic activities of photocatalysts.In this work,a novel Ag/Bi_(24)O_(31)Cl_(10)heterojunction has been developed by the in-situ photoreduction technique to address the preceding issues.Physico-chemical properties of as-synthesized 0.7 wt%Ag/Bi_(24)O_(31)Cl_(10)photocatalysts were investigated in detail.The Ag clusters can be seen as surface plasmon polaritons to light absorption capacity and photothermal effect,which was demonstrated via Raman and UV-Vis diffuse reflectance spectra(UV-Vis DRS).Den-sity functional theory(DFT)calculations show that the additional unoccupied crystal orbital by the silver(Ag)will accelerate the charge separation where some of the excited electrons to the conduction band of Bi_(24)O_(31)Cl_(10)will drift to these orbitals which in turn prevent charge recombination.Therefore,Ag metal cluster-decorated Bi_(24)O_(31)Cl_(10)photocatalysts can be identified as electron trappers to boost the spatial separation of the photogenerated carrier,and finally,the CH 4 generation rate and the rhodamine b(RhB)degraded efficiency of Ag/Bi_(24)O_(31)Cl_(10)photocatalysts are enhanced about 1.54 and 5.20 times,respectively.The Ag/Bi_(24)O_(31)Cl_(10)composite photocatalyst retained high photocatalytic activities after four cycles indi-cating the stability and repeatability of the Ag/Bi_(24)O_(31)Cl_(10)composite.This work aims to provide new insight into modifying ideal semiconductor materials for high photocatalytic activity.

关 键 词：PHOTOCATALYST Bi_(24)O_(31)Cl_(10) Ag clusters Surface plasmon polariton Electron trapper 

分 类 号：TB383.1[一般工业技术—材料科学与工程] O643.36[理学—物理化学]