The bifunctional Lewis acid site improved reactive oxygen species production: a detailed study of surface acid site modulation of TiO2 using ethanol and Br-

doi:10.1039/d1cy01760h

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	The bifunctional Lewis acid site improved reactive oxygen species production: a detailed study of surface acid site modulation of TiO2 using ethanol and Br-
	Zheng, Yi 1; Shi, Junqing 1; Xu, Haiming 2; Jin, Xingzhi 1; Ou, Yujing 1; Wang, Yi 1; Li, Chunlei 1
刊名	CATALYSIS SCIENCE & TECHNOLOGY
	2022-01-26
卷号	12 期号:2 页码:565-571
关键词	Bromine compounds Efficiency Ethanol Modulation Oxygen Photocatalytic activity Photooxidation Surface reactions % reductions Bi-functional Halogen ion Lewis acid site Photogenerated electrons Photoreduction reaction Reactive oxygen species Superoxide radical Surface acid sites Synergistic effect
ISSN号	2044-4753
DOI	10.1039/d1cy01760h
英文摘要	Modulation of surface acid sites (SAS) can effectively enhance the efficiency of reactive oxygen species (ROS) production. However, the role of SAS has been neglected for photoreduction reactions. Here, we report a Lewis acid site (L-acid) rich TiO2 prepared using the synergistic effect of ethanol and halogen ions. The formation of L-acid improves the adsorption and mobility of O-2, which facilitates its reduction into a superoxide radical (O-2(-)). L-acid may lift the population of photogenerated electrons (e(-)), which is concluded from the presence of a CH3 signal in the DMPO-O-2(-) ESR spectrum of only L-acid rich TiO2. In addition, L-acid enhances the migration of photogenerated holes (h(+)) to the surface of the catalyst, which induces a continuous photooxidation reaction of H2O or -OH. Therefore, L-acid simultaneously enhances the photoredox ROS generation reaction, resulting in higher photocatalytic activity. This work illustrates a dual function of L-acid and provides a useful strategy for improving the photocarrier separation and surface reaction efficiency.
WOS研究方向	Chemistry
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000730763400001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/154984]
专题	石油化工学院
作者单位	1.Lanzhou Univ Technol, Sch Petrochem Engn, Pengjiaping Rd 36, Lanzhou 730050, Peoples R China; 2.Wuhan Text Univ, Sch Environm Engn, Wuhan 430073, Peoples R China
推荐引用方式 GB/T 7714	Zheng, Yi,Shi, Junqing,Xu, Haiming,et al. The bifunctional Lewis acid site improved reactive oxygen species production: a detailed study of surface acid site modulation of TiO2 using ethanol and Br-[J]. CATALYSIS SCIENCE & TECHNOLOGY,2022,12(2):565-571.
APA	Zheng, Yi.,Shi, Junqing.,Xu, Haiming.,Jin, Xingzhi.,Ou, Yujing.,...&Li, Chunlei.(2022).The bifunctional Lewis acid site improved reactive oxygen species production: a detailed study of surface acid site modulation of TiO2 using ethanol and Br-.CATALYSIS SCIENCE & TECHNOLOGY,12(2),565-571.
MLA	Zheng, Yi,et al."The bifunctional Lewis acid site improved reactive oxygen species production: a detailed study of surface acid site modulation of TiO2 using ethanol and Br-".CATALYSIS SCIENCE & TECHNOLOGY 12.2(2022):565-571.