2D/2D layered BiOIO_(3)/g-C_(3)N_(4)S-scheme heterojunction for photocatalytic NO oxidation  

作　　者：Xiaofeng Wu Ningxin Kang Xiaofang Li Zhihua Xu Sónia A.C.Carabineiro Kangle Lv 

机构地区：[1]College of Chemistry and Environmental Engineering,Wuhan Polytechnic University,Wuhan 430023,China [2]College of Resources and Environment,South-Central Minzu University,Wuhan 430074,China [3]School of Optoelectronic Materials and Technology,Jianghan University,Wuhan 430056,China [4]LAQV–REQUIMTE,Department of Chemistry,NOVA School of Science and Technology,Universidade NOVA de Lisboa Caparica,2829-516,Portugal

出　　处：《Journal of Materials Science & Technology》2024年第29期40-49,共10页材料科学技术(英文版)

基　　金：financially supported by the National Nat-ural Science Foundation of China(Nos.22302153,51672312 and 21373275);the Key Research and Development Project of Hubei Province(No.2020BBB068);jointed supported by the Hubei Provincial Natural Science Foundation and Huangshi of China(No.2022CFD001);the Educational Commission of Hubei Province(No.B2022253);the Unveils List System Science and Technology Project of Hubei Provincial Science and Technology Department(No.2021BEC016);the Research and Innovation Ini-tiatives of WHPU(Nos.2023Y25&2023Y26);the Fundamental Research Funds for the Central Universities of South-Central Minzu University(Nos.CZP22001 and CZZ21012);the Excel-lent Discipline Cultivation Project by JHUN(No.2023XKZ027);FCT/MCTES(DOIs:10.54499/LA/P/0008/2020,10.54499/UIDP/50006/2020,10.54499/UIDB/50006/2020,and 10.54499/CEECINST/00102/2018/CP1567/CT0026).

摘　　要：It is essential to promote interfacial separation and charge migration in heterojunctions for effectively driving surface photocatalytic reactions.In this work,we report the construction of a 2D/2D layered BiOIO_(3)/g-C_(3)N_(4)(BIO/CN)heterojunction for photocatalytic NO removal.The BIO/CN heterojunction exhibits a remarkably higher NO photo-oxidation removal rate(46.9%)compared to pristine BIO(20.1%)and CN(25.9%)under visible-light irradiation.Additionally,it effectively suppresses the formation of toxic NO_(2)intermediates during photocatalytic reaction.The improved photocatalytic performance of BIO/CN composite is caused by its S-scheme charge carrier transport mechanism,which is supported by Density Functional Theory simulations of work function and electron density difference,along with in-situ irradiated X-ray Photoelectron Spectroscopy and Electron Paramagnetic Resonance analyses.This S-scheme structure improves the interfacial carrier separation efficiency and retains the strong photo-redox ability.Our study demonstrates that construction of a S-scheme heterojunction is significant in the design and preparation of highly efficient photocatalysts for air purification.

关 键 词：BiOIO_(3) g-C_(3)N_(4) S-scheme heterojunction PHOTOCATALYSIS NO_(x)removal 

分 类 号：TB3[一般工业技术—材料科学与工程]