Enhanced Photoelectrochemical Activity of ZnO-Coated TiO2 Nanotubes and Its Dependence on ZnO Coating Thickness

doi:10.1186/s11671-016-1309-9

	Enhanced Photoelectrochemical Activity of ZnO-Coated TiO2 Nanotubes and Its Dependence on ZnO Coating Thickness
	Cai, Hua 1; Liang, Peipei 1; Hu, Zhigao 2; Shi, Liqun 3; Yang, Xu 1; Sun, Jian 1; Xu, Ning 1; Wu, Jiada 1
刊名	NANOSCALE RESEARCH LETTERS
	2016-02-24
卷号	11 页码:104
关键词	Photoelectrochemical activity Heterogeneous nanostructure TiO2 ZnO ZnO-coated TiO2 nanotube
ISSN号	1556-276X
DOI	10.1186/s11671-016-1309-9
英文摘要	One-dimensional heterogeneous nanostructures in the form of ZnO-coated TiO2 nanotubes (ZnO/TiO2 NTs) were fabricated by atomic layer deposition of an ultrathin ZnO coating on electrochemical anodization-formed TiO2 nanotubes (NTs) with the thickness of ZnO coating being precisely controlled at atomic scale, and the photoelectrochemical activity of the fabricated ZnO/TiO2 NTs and the influence of ZnO coating and its thickness were studied. The structures of TiO2 NTs and ZnO coatings were characterized by X-ray diffraction, Raman backscattering spectroscopy, and transmission electron microscopy. The photoelectrochemical activity was studied through the measurements of electrochemical impendence, flat-band potential, and transient photocurrent density. The TiO2 NTs exhibit anatase structure, and the ZnO coatings are structured with hexagonal wurtzite. The photoelectrochemical activity of the ZnO/TiO2 NTs is strongly dependent on the thickness of ZnO coating. ZnO/TiO2 NTs with a thinner rather than a thicker ZnO coating exhibit better photoelectrochemical activity with reduced charge transfer resistance, increased negative flat-band potentials, and enhanced photocurrent densities. Under visible illumination, an increase of about 60 % in the photoelectrochemical activity is obtained for ZnO/TiO2 NTs with an about 2-nm-thick ZnO coating.
资助项目	National Natural Science Foundation of China[11275051]
WOS关键词	SENSITIZED SOLAR-CELLS ; ATOMIC LAYER DEPOSITION ; CORE/SHELL SEMICONDUCTOR NANOCRYSTALS ; PHOTOCATALYTIC ACTIVITY ; OPTICAL-PROPERTIES ; PHOTOLUMINESCENCE ; ZNO-TIO2 ; ARRAYS ; PERFORMANCE ; SURFACE
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000391753000008
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/44178]
专题	中国科学院近代物理研究所
通讯作者	Wu, Jiada
作者单位	1.Fudan Univ, Dept Opt Sci & Engn, Shanghai 200433, Peoples R China 2.East China Normal Univ, Key Lab Polar Mat & Devices, Minist Educ, Shanghai 200241, Peoples R China 3.Fudan Univ, Inst Modern Phys, Shanghai 200433, Peoples R China
推荐引用方式 GB/T 7714	Cai, Hua,Liang, Peipei,Hu, Zhigao,et al. Enhanced Photoelectrochemical Activity of ZnO-Coated TiO2 Nanotubes and Its Dependence on ZnO Coating Thickness[J]. NANOSCALE RESEARCH LETTERS,2016,11:104.
APA	Cai, Hua.,Liang, Peipei.,Hu, Zhigao.,Shi, Liqun.,Yang, Xu.,...&Wu, Jiada.(2016).Enhanced Photoelectrochemical Activity of ZnO-Coated TiO2 Nanotubes and Its Dependence on ZnO Coating Thickness.NANOSCALE RESEARCH LETTERS,11,104.
MLA	Cai, Hua,et al."Enhanced Photoelectrochemical Activity of ZnO-Coated TiO2 Nanotubes and Its Dependence on ZnO Coating Thickness".NANOSCALE RESEARCH LETTERS 11(2016):104.