Enhanced photoelectrochemical and photocatalytic performance of TiO2 nanorod arrays/CdS quantum dots by coating TiO2 through atomic layer deposition

被引：111
作者：
Xie, Zheng [1 ,2 ]
Liu, Xiangxuan [2 ]
Wang, Weipeng [1 ]
Wang, Xuanjun [2 ]
Liu, Can [1 ]
Xie, Qian [1 ]
Li, Zhengcao [1 ]
Zhang, Zhengjun [3 ]
机构：
[1] Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China
[2] High Tech Inst Xian, Xian 710025, Peoples R China
[3] Tsinghua Univ, Sch Mat Sci & Engn, Key Lab Adv Mat MOE, Beijing 100084, Peoples R China
来源：
NANO ENERGY | 2015年 / 11卷
基金：
中国国家自然科学基金;
关键词：
TiO2 nanorod arrays/CdS quantum dots; Photoelectrochemistry; Photocatalyst; Atomic layer deposition; Visible light; MESOPOROUS SOLAR-CELLS; NANOTUBE ARRAYS; CDS; EFFICIENT; FILMS; WATER; STABILITY;
D O I：
10.1016/j.nanoen.2014.11.024
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
TiO2 nanorod arrays/CdS quantum dots/ALD-TiO2 nanostructures were fabricated as photocatalyst and its related properties were investigated comprehensively. Enhanced photoelectrochmical properties are observed and the degradation rate of methyl orange under visible light is enhanced by ca. 156% compared to the nanorod arrays/CdS quantum dots, which is due to the enhancement of the separation of electrons-holes induced by the introduction of the ultrathin TiO2 top layer. Moreover, the stability of the TiO2 nanorod arrays/CdS quantum dots is increased by the ALD-TiO2 coating. These results suggest that the design of TiO2 nanorod arrays/CdS quantum dots/ALD-TiO2 nanostructures gives a promising strategy to improve the photoelectrochemical and photocatalytic properties in solar energy conversion, along with reduced photo-corrosion in the semiconductor-semiconductor heterojunction. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：400 / 408
页数：9
相关论文
共 40 条
[1]   Recent progress on photocatalytic and photoelectrochemical water splitting under visible light irradiation [J].
Abe, Ryu .
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS, 2010, 11 (04) :179-209
[2]   Photosensitization of TiO2 Nanostructures with CdS Quantum Dots: Particulate versus Tubular Support Architectures [J].
Baker, David R. ;
Kamat, Prashant V. .
ADVANCED FUNCTIONAL MATERIALS, 2009, 19 (05) :805-811
[3]   Nanostructured TiO2 films with 2 eV optical gaps [J].
Barborini, E ;
Conti, AM ;
Kholmanov, I ;
Piseri, P ;
Podestà, A ;
Milani, P ;
Cepek, C ;
Sakho, O ;
Macovez, R ;
Sancrotti, M .
ADVANCED MATERIALS, 2005, 17 (15) :1842-+
[4]   Branched TiO2 Nanorods for Photoelectrochemical Hydrogen Production [J].
Cho, In Sun ;
Chen, Zhebo ;
Forman, Arnold J. ;
Kim, Dong Rip ;
Rao, Pratap M. ;
Jaramillo, Thomas F. ;
Zheng, Xiaolin .
NANO LETTERS, 2011, 11 (11) :4978-4984
[5]   Optical Properties of the Type-II Core-Shell TiO2@CdS Nanorods for Photovoltaic Applications [J].
Das, Kajari ;
De, S. K. .
JOURNAL OF PHYSICAL CHEMISTRY C, 2009, 113 (09) :3494-3501
[6]   ELECTROCHEMICAL PHOTOLYSIS OF WATER AT A SEMICONDUCTOR ELECTRODE [J].
FUJISHIMA, A ;
HONDA, K .
NATURE, 1972, 238 (5358) :37-+
[7]   Uncovering the role of the ZnS treatment in the performance of quantum dot sensitized solar cells [J].
Guijarro, Nestor ;
Campina, Jose M. ;
Shen, Qing ;
Toyoda, Taro ;
Lana-Villarreal, Teresa ;
Gomez, Roberto .
PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2011, 13 (25) :12024-12032
[8]   Optical and photocatalytic properties of oblique angle deposited TiO2 nanorod array [J].
He, Y. P. ;
Zhang, Z. Y. ;
Zhao, Y. P. .
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, 2008, 26 (04) :1350-1358
[9]   Photoelectrochemical Properties of TiO2 Nanowire Arrays: A Study of the Dependence on Length and Atomic Layer Deposition Coating [J].
Hwang, Yun Jeong ;
Hahn, Chris ;
Liu, Bin ;
Yang, Peidong .
ACS NANO, 2012, 6 (06) :5060-5069
[10]   High Density n-Si/n-TiO2 Core/Shell Nanowire Arrays with Enhanced Photoactivity [J].
Hwang, Yun Jeong ;
Boukai, Akram ;
Yang, Peidong .
NANO LETTERS, 2009, 9 (01) :410-415
1234