Three-Dimensional Bi 5 O 7 I Photocatalysts for Efficient Removal of NO in Air Under Visible Light

被引：0
作者：
Wang W. [1 ]
Huang Y. [1 ,2 ]
Zhang X. [3 ]
Cao J.-J. [1 ,2 ]
Ho W. [1 ,4 ]
Lee S.C. [5 ]
机构：
[1] Key Laboratory of Aerosol Chemistry & Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an
[2] State Key Laboratory of Loess and Quaternary Geology (SKLLQG), Institute of Earth Environment, Chinese Academy of Sciences, Xi’an
[3] College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan
[4] Department of Science and Environmental Studies, The Education University of Hong Kong
[5] Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom
来源：
Aerosol Science and Engineering | 2017年 / 1卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Bi[!sub]5[!/sub]O[!sub]7[!/sub]I; Bismuth compounds; NO[!sub]x[!/sub] removal; Photocatalysis;
D O I：
10.1007/s41810-017-0003-3
中图分类号：
学科分类号：
摘要：
In this study, we report a flower-like Bi5O7I photocatalyst with a 41% gaseous nitride oxide (NO) removal efficiency under visible light through the in situ thermal treatment of the hierarchical architecture BiOI synthesized using a facile hydrothermal process. The UV–Vis diffuse reflectance spectroscopy and photocurrent experiments showed that the absorption band edge and photo-induced electron–hole pairs separation efficiency of Bi5O7I were negative than that of BiOI, whereas the as-prepared Bi5O7I exhibited excellent and stable visible light photocatalytic performance for NO removal as compared with original BiOI and P25. The results of electron spin resonance spectroscopy and density functional theory calculations suggested that the prominent visible light photocatalytic activity of obtained Bi5O7I has been attributed to the proper electron band structure which oxidizes the O2 molecule to · OH radicals with two electrons in the conduction band. © 2017, Institute of Earth Environment, Chinese Academy Sciences.
引用
收藏
页码：33 / 40
页数：7
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