Unravelling charge separation via surface built-in electric fields within single particulate photocatalysts

doi:10.1039/c6fd00214e

	Unravelling charge separation via surface built-in electric fields within single particulate photocatalysts
	Chen, Ruotian 1,2; Zhu, Jian 1; An, Hongyu 1,2; Fan, Fengtao 1; Li, Can 1
刊名	FARADAY DISCUSSIONS
	2017-06-01
卷号	198 页码:473-479
DOI	10.1039/c6fd00214e
英文摘要	Kelvin Probe Force Microscopy (KPFM) and spatially resolved surface photovoltage (SRSPV) techniques were employed to reveal built-in electric fields and surface photogenerated charge distribution on single particulate photocatalysts. The photogenerated holes and electrons spread over the whole surface of the particulate photocatalyst are imaged on n-type BiVO4 and p-type Cu2O single particles, respectively. It is demonstrated that the built-in electric field in the surface Space Charge Region (SCR) dictates the charge separation/transfer processes and allows the drift of one kind of the photogenerated carriers to the surface, while holding another kind of the carriers in the bulk. The results emphasize the role of the SCR played in the unidirectional charge transport between the bulk and surface in the particulate photocatalyst, which may be the crucial reason for low solar energy conversion efficiency.
语种	英语
WOS记录号	WOS:000402870300028
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/152236]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	1.Chinese Acad Sci, Dalian Natl Lab Clean Energy, Dalian Inst Chem Phys, State Key Lab Catalysis,iChEM, Zhongshan Rd 457, Dalian 116023, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Chen, Ruotian,Zhu, Jian,An, Hongyu,et al. Unravelling charge separation via surface built-in electric fields within single particulate photocatalysts[J]. FARADAY DISCUSSIONS,2017,198:473-479.
APA	Chen, Ruotian,Zhu, Jian,An, Hongyu,Fan, Fengtao,&Li, Can.(2017).Unravelling charge separation via surface built-in electric fields within single particulate photocatalysts.FARADAY DISCUSSIONS,198,473-479.
MLA	Chen, Ruotian,et al."Unravelling charge separation via surface built-in electric fields within single particulate photocatalysts".FARADAY DISCUSSIONS 198(2017):473-479.