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

Wei Wang; Yu Huang; Xiaochao Zhang; Jun ji Cao; Wingkei Ho; Shun Cheng Lee

doi:10.1007/s41810-017-0003-3

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

Wei Wang, Yu Huang, Xiaochao Zhang, Jun ji Cao, Wingkei Ho, Shun Cheng Lee

Research output: Journal article publication › Journal article › Academic research › peer-review

7 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	33-40
Number of pages	8
Journal	Aerosol Science and Engineering
Volume	1
Issue number	1
DOIs	https://doi.org/10.1007/s41810-017-0003-3
Publication status	Published - 1 May 2017

Keywords

BiOI
Bismuth compounds
NO removal
Photocatalysis

ASJC Scopus subject areas

Environmental Chemistry
General Materials Science
Pollution

More information

10.1007/s41810-017-0003-3

Cite this

@article{4f974b11db2e4f60b76c5708dfd5de18,

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

abstract = "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.",

keywords = "BiOI, Bismuth compounds, NO removal, Photocatalysis",

author = "Wei Wang and Yu Huang and Xiaochao Zhang and Cao, {Jun ji} and Wingkei Ho and Lee, {Shun Cheng}",

note = "Funding Information: This research was financially supported by the National Science Foundation of China (41401567, 41573138) and the “Strategic Priority Research Program” of the Chinese Academy of Sciences (Grant No. XDB05000000). Yu Huang is also supported by the “Hundred Talent Program” of the Chinese Academy of Sciences. Publisher Copyright: {\textcopyright} 2017, Institute of Earth Environment, Chinese Academy Sciences.",

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doi = "10.1007/s41810-017-0003-3",

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AU - Wang, Wei

AU - Huang, Yu

AU - Zhang, Xiaochao

AU - Cao, Jun ji

AU - Ho, Wingkei

AU - Lee, Shun Cheng

N1 - Funding Information: This research was financially supported by the National Science Foundation of China (41401567, 41573138) and the “Strategic Priority Research Program” of the Chinese Academy of Sciences (Grant No. XDB05000000). Yu Huang is also supported by the “Hundred Talent Program” of the Chinese Academy of Sciences. Publisher Copyright: © 2017, Institute of Earth Environment, Chinese Academy Sciences.

PY - 2017/5/1

Y1 - 2017/5/1

N2 - 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.

AB - 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.

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