Enhanced energy storage of a UV-irradiated three-dimensional nanostructured TiO2-Ni(OH)2 composite film and its electrochemical discharge in the dark

被引：11

作者：

Zhang, Liying ^{[1
]}

Xu, Lei ^{[1
]}

Wang, Jianming ^{[1
]}

Cai, Jing ^{[1
]}

Xu, Jing ^{[1
]}

Zhou, Huan ^{[1
]}

Zhong, Yuan ^{[1
]}

Chen, Dan ^{[1
]}

Zhang, Jianqing ^{[1
,2
]}

Cao, Chu-nan ^{[1
,2
]}

机构：

[1] Zhejiang Univ, Dept Chem, Hangzhou 310027, Peoples R China

[2] Chinese Acad Sci, State Key Lab Corros & Protect Metal, Inst Met Res, Shenyang 110016, Peoples R China

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2012年 / 683卷

基金：

中国国家自然科学基金;

关键词：

Energy storage; TiO2; nanoarrays; Three-dimensional nanostructure; Nickel hydroxide; UV irradiation; SENSITIZED SOLAR-CELLS; TIO2-WO3 PHOTOCATALYSIS SYSTEMS; NANOTUBE ARRAYS; NANOWIRE ARRAYS; PHOTOELECTROCHEMICAL ANTICORROSION; DYE; OXIDATION; ABILITY; ELECTRODE; BEHAVIOR;

D O I：

10.1016/j.jelechem.2012.07.041

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Oriented rutile TiO2 nanoarrays on transparent conductive fluorine-doped tin oxide (FTO) substrates were prepared by a facile hydrothermal synthesis. A three-dimensional (3D) nanostructured TiO2(OH)(2) composite film was further constructed by a novel electrochemical procedure using the obtained TiO2 nanorod array as substrate. A photosensitized electrolytic oxidation phenomenon was observed for the as-prepared TiO2-Ni(OH)(2) composite film electrode under UV irradiation. It was found that the photosensitized electrolytic oxidation of Ni(OH)(2) exhibited a much lower rate than the corresponding electrochemical oxidation. The as-prepared 3D nanostructured TiO2-Ni(OH)(2) composite film electrode, coupled with platinum, showed excellent UV-induced oxidative energy storage ability, and the apparent quantum yield was as high as 10.6%. The nanostructured composite film electrode still delivered a discharge capacity of 5.45 mC cm(-2) after 45 irradiation-discharge cycles, manifesting the good reversibility of the UV-induced oxidative energy storage and conversion. It was concluded that the enhanced UV-induced oxidative energy storage of the TiO2-Ni(OH)(2) composite film can be ascribed to its unique nanostructured characteristics. (C). 2012 Elsevier B.V. All rights reserved.

引用

页码：55 / 61

页数：7

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