Internal Electric Fields within the Photocatalysts

CORC > 上海硅酸盐研究所 > 中国科学院上海硅酸盐研究所 > 高性能陶瓷和超微结构国家重点实验室 > 期刊论文

	Internal Electric Fields within the Photocatalysts
	Zhang Ling; Su Yang; Wang Wenzhong
刊名	PROGRESS IN CHEMISTRY
	2016-04-01
卷号	28 期号:4 页码:415-427
关键词	internal electric field photocatalysis separation of carriers band bending
英文摘要	Separation of photogenerated electron-hole pairs is a key step to enhance the photocatalytic activity of semiconductor photocatalysts. Internal electric filed, as a potential driving force to separation of the carriers, has become one of the research hotspots in photocatalytic field recently. In this paper, the literatures about the enhancement of photocatalytic performance based on the internal electric field are reviewed. To align their potentials (E-f), charge transfer occurs between two different component semiconductor materials. This charge redistribution region is known as the space charge region. After the charge transfer, the accumulation of electrons on the semiconductor surface leads to upward band bending. The internal electric field can be formed due to the redistribution of charges, which may in turn facilitate the separation of electrons and holes for reactions. The upward or downward bending can drive the holes/electrons to run up for an oxidation reaction/a reduction reaction, respectively. Internal electric fields within photocatalysts can arise from ferroelectric phenomena, p-n/polymorph junctions, polar surface terminations, and nonlinear optical material. The internal electric fields within photocatalysts mitigate the effects of recombination and back-reaction, then to increase photochemical reactivity. The strategies for manipulation of internal fields are also discussed for the design of efficient photocatalysts. Finally,we highlight some crucial issues in engineering internal electric fields and provide tentative suggestions for future research on increasing their photocatalytic performance. Especially, the importance of using advanced physical technology and theoretical calculation method to characterize the distribution of internal electric field is emphasized.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Chemistry, Multidisciplinary
研究领域[WOS]	Chemistry
关键词[WOS]	POLAR OXIDE SURFACES ; VIBRATING PIEZOELECTRIC MICROFIBERS ; TITANIUM-DIOXIDE ; ANATASE TIO2 ; PHOTOCHEMICAL REDUCTION ; CARRIER SEPARATION ; SINGLE-CRYSTALS ; PHASE JUNCTION ; EFFECTIVE-MASS ; 101 FACETS
收录类别	SCI
语种	英语
WOS记录号	WOS:000375742000002
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/23103]
专题	上海硅酸盐研究所_高性能陶瓷和超微结构国家重点实验室_期刊论文
作者单位	Chinese Acad Sci, Shanghai Inst Ceram, Shanghai 200050, Peoples R China
推荐引用方式 GB/T 7714	Zhang Ling,Su Yang,Wang Wenzhong. Internal Electric Fields within the Photocatalysts[J]. PROGRESS IN CHEMISTRY,2016,28(4):415-427.
APA	Zhang Ling,Su Yang,&Wang Wenzhong.(2016).Internal Electric Fields within the Photocatalysts.PROGRESS IN CHEMISTRY,28(4),415-427.
MLA	Zhang Ling,et al."Internal Electric Fields within the Photocatalysts".PROGRESS IN CHEMISTRY 28.4(2016):415-427.