Photocatalytic reactive oxygen species generation activity of TiO2 improved by the modification of persistent free radicals

doi:10.1039/d1en00832c

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	Photocatalytic reactive oxygen species generation activity of TiO2 improved by the modification of persistent free radicals
	Liu, Jianli 1; Dong, Guohui 1; Jing, Jun 1; Zhang, Shuyun 1; Huang, Yu 2; Ho, Wingkei 3,4
通讯作者	Dong, Guohui(dongguohui@sust.edu.cn)
	2021-11-08
发表期刊	ENVIRONMENTAL SCIENCE-NANO
ISSN	2051-8153
页码	9
摘要	Environmentally persistent free radicals (EPFRs) may help mineral dust to produce more reactive oxygen species (ROS). However, the mechanism of this effect is not yet clear. Therefore, in this study, anatase modified with EPFRs was synthesized via a simple two-step method. The presence of EPFRs was confirmed using a series of characterization techniques, including electron paramagnetic resonance and nuclear magnetic resonance. Herein, we found that EPFRs can improve OH generation via the oxidation reaction between photogenerated holes (h(+)) and OH- (or H2O). This result was due to two reasons. The first is that the EPFRs construct a built-in electric field, which helps the migration of h(+) from the bulk to the surface of anatase and then to EPFRs. The other reason is that EPFRs help anatase adsorb more H2O molecules, which are then oxidized to OH by h(+). This study will help to understand the photochemical production mechanism of ROS on the surface of mineral dust.
DOI	10.1039/d1en00832c
关键词[WOS]	HETEROGENEOUS REACTION ; HYDROXYL RADICALS ; ORGANIC-COMPOUNDS ; CHEMISTRY ; KINETICS ; SUNLIGHT ; MODEL ; HONO
收录类别	SCI ; SCI
语种	英语
资助项目	National Nature Science Foundation of China[21876104] ; National Nature Science Foundation of China[21603109] ; Strategic Priority Research Program of the Chinese Academy of Sciences, China[XDA23010300] ; Strategic Priority Research Program of the Chinese Academy of Sciences, China[XDA23010000]
WOS研究方向	Chemistry ; Environmental Sciences & Ecology ; Science & Technology - Other Topics
项目资助者	National Nature Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences, China
WOS类目	Chemistry, Multidisciplinary ; Environmental Sciences ; Nanoscience & Nanotechnology
WOS记录号	WOS:000721930400001
出版者	ROYAL SOC CHEMISTRY
引用统计	被引频次：18[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/17227
专题	粉尘与环境研究室
通讯作者	Dong, Guohui
作者单位	1.Shaanxi Univ Sci & Technol, Sch Environm Sci & Engn, Xian 710021, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, Xian 710061, Peoples R China 3.Hong Kong Inst Educ, Dept Sci & Environm Studies, Tai Po, Hong Kong, Peoples R China 4.Hong Kong Inst Educ, Ctr Educ Environm Sustainabil, Tai Po, Hong Kong, Peoples R China
推荐引用方式 GB/T 7714	Liu, Jianli,Dong, Guohui,Jing, Jun,et al. Photocatalytic reactive oxygen species generation activity of TiO2 improved by the modification of persistent free radicals[J]. ENVIRONMENTAL SCIENCE-NANO,2021:9.
APA	Liu, Jianli,Dong, Guohui,Jing, Jun,Zhang, Shuyun,Huang, Yu,&Ho, Wingkei.(2021).Photocatalytic reactive oxygen species generation activity of TiO2 improved by the modification of persistent free radicals.ENVIRONMENTAL SCIENCE-NANO,9.
MLA	Liu, Jianli,et al."Photocatalytic reactive oxygen species generation activity of TiO2 improved by the modification of persistent free radicals".ENVIRONMENTAL SCIENCE-NANO (2021):9.