Z-机制g-C_(3)N_(4)/Bi/BiOBr异质结光催化剂制备及其可见光降解甲醛气体研究  

Preparation of Z-Scheme g-C_(3)N_(4)/Bi/BiOBr Heterojunction Photocatalyst and Its Visible Light Degradation of Formaldehyde Gas

作　　者：彭江伟 江卓婷 姜奎兵 姜森[1] 朱会荣[1] 闫刚 郭向威 PENG Jiang-wei;JIANG Zhuo-ting;JIANG Kui-bing;JIANG Sen;ZHU Hui-rong;YAN Gang;GUO Xiang-wei(Jilin Jianzhu University,College of Material Science and Engineering,Changchun 130118,China;Anyang Normal University,College of Chemistry and Chemical Engineering,Anyang 455000,China)

机构地区：[1]吉林建筑大学材料科学与工程学院,吉林长春130118 [2]安阳师范学院化学化工学院,河南安阳455000

出　　处：《分子催化》2023年第1期53-62,I0003,共11页Journal of Molecular Catalysis(China)

基　　金：吉林省科技厅自然科学基金(No.20210101138JC);吉林省教育厅科学技术研究项目(JJKH20220264KJ);河南省自然科学基金青年基金项目(No.202300410025);吉林建筑大学2022年大学生创新创业训练计划:202210191008,S202210191023。

摘　　要：通过将BiOBr纳米片与g-C_(3)N_(4)复合,然后原位还原,合成了具有纳米花状结构的三元异质结光催化剂g-C_(3)N_(4)/Bi/BiOBr.对g-C_(3)N_(4)/Bi/BiOBr的结构、形貌、元素价态和光学性能等进行了表征和研究.评估了g-C_(3)N_(4)/Bi/BiOBr对气体甲醛的光催化降解活性.g-C_(3)N_(4)/Bi/BiOBr在可见光照射下降解甲醛的活性与g-C_(3)N_(4)、BiOBr单体和g-C_(3)N_(4)/BiOBr二元复合物相比显著提高.20%-g-C_(3)N_(4)/Bi/BiOBr复合物可以在60 min内(λ>400 nm)降解80%的气态甲醛(初始浓度0.16 mg·L^(-1)).In this paper,the ternary heterojunction photocatalyst g-C_(3)N_(4)/Bi/BiOBr with nano flower structure was synthesized by compounding the BiOBr nano sheet with g-C_(3)N_(4),and then reducing in situ.The structure,morphology,valence states and optical properties of g-C_(3)N_(4)/Bi/BiOBr were characterized and studied.The photocatalytic activity of g-C_(3)N_(4)/Bi/BiOBr for the degradation of gaseous formaldehyde was evaluated.Compared with g-C_(3)N_(4),BiOBr monomer and g-C_(3)N_(4)/BiOBr binary complex,the activity of g-C_(3)N_(4)/Bi/BiOBr to degrade formaldehyde under visible light irradiation is significantly improved.20%-g-C_(3)N_(4)/Bi/BiOBr composite can be used within 60 minutes(λ>400 nm)degrades 80%of gaseous formaldehyde(initial concentration 0.16 mg·L^(-1)).

关 键 词：光催化 异质结 Z-机制 甲醛 

分 类 号：O643[理学—物理化学]