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DOI	10.1073/pnas.1907122116
	Single-molecule and -particle probing crystal edge/corner as highly efficient photocatalytic sites on a single TiO2 particle
	Wang W.-K.; Chen J.-J.; Lou Z.-Z.; Kim S.; Fujitsuka M.; Yu H.-Q.; Majima T.
发表日期	2019
ISSN	0027-8424
起始页码	18827
结束页码	18833
卷号	116 期号:38
英文摘要	The exposed active sites of semiconductor catalysts are essential to the photocatalytic energy conversion efficiency. However, it is difficult to directly observe such active sites and understand the photogenerated electron/hole pairs’ dynamics on a single catalyst particle. Here, we applied a quasi-total internal reflection fluorescence microscopy and laser-scanning confocal microscopy to identify the photocatalytic active sites at a single-molecule level and visualized the photogenerated hole–electron pair dynamics on a single TiO2 particle, the most widely used photocatalyst. The experimental results and density functional theory calculations reveal that holes and electrons tend to reach and react at the same surface sites, i.e., crystal edge/corner, within a single anatase TiO2 particle owing to the highly exposed (001) and (101) facets. The observation provides solid proof for the existence of the surface junction “edge or corner” on single TiO2 particles. These findings also offer insights into the nature of the photocatalytic active sites and imply an activity-based strategy for rationally engineering catalysts for improved photocatalysis, which can be also applied for other catalytic materials. © 2019 National Academy of Sciences. All rights reserved.
英文关键词	Crystal edge/corner; Photocatalyst; Single-molecule microscopy; Single-particle microscopy; TiO2
语种	英语
scopus关键词	titanium dioxide nanoparticle; Article; catalyst; confocal laser scanning microscopy; crystal structure; density functional theory; electron; exposure; photocatalysis; priority journal; surface area; total internal reflection fluorescence microscopy; X ray diffraction
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160350
作者单位	Wang, W.-K., Chinese Academy of Sciences Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei, 230026, China, Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan, Department of Chemistry, Tongji University, Shanghai, 200000, China; Chen, J.-J., Chinese Academy of Sciences Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei, 230026, China; Lou, Z.-Z., Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan; Kim, S., Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan; Fujitsuka, M., Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan; Yu, H.-Q., Chinese Academy of Sciences Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Scien...
推荐引用方式 GB/T 7714	Wang W.-K.,Chen J.-J.,Lou Z.-Z.,et al. Single-molecule and -particle probing crystal edge/corner as highly efficient photocatalytic sites on a single TiO2 particle[J],2019,116(38).
APA	Wang W.-K..,Chen J.-J..,Lou Z.-Z..,Kim S..,Fujitsuka M..,...&Majima T..(2019).Single-molecule and -particle probing crystal edge/corner as highly efficient photocatalytic sites on a single TiO2 particle.Proceedings of the National Academy of Sciences of the United States of America,116(38).
MLA	Wang W.-K.,et al."Single-molecule and -particle probing crystal edge/corner as highly efficient photocatalytic sites on a single TiO2 particle".Proceedings of the National Academy of Sciences of the United States of America 116.38(2019).