Facile synthesis of CdS@TiO2 core-shell nanorods with controllable shell thickness and enhanced photocatalytic activity under visible light irradiation

被引：98
作者：
Dong, Wenhao [1 ,2 ]
Pan, Feng [1 ,2 ]
Xu, Leilei [1 ,2 ]
Zheng, Minrui [3 ]
Sow, Chorng Haur [3 ]
Wu, Kai [2 ,4 ]
Xu, Guo Qin [1 ,2 ]
Chen, Wei [1 ,2 ,3 ,5 ]
机构：
[1] Natl Univ Singapore, Dept Chem, 3 Sci Dr 3, Singapore 117543, Singapore
[2] Peking Univ, Ctr Res Excellence & Technol Enterprise CREATE, Res Ctr, Singapore 138602, Singapore
[3] Natl Univ Singapore, Dept Phys, Singapore 117551, Singapore
[4] Peking Univ, Coll Chem & Mol Engn, BNLMS, SKLSCUSS, Beijing 100871, Peoples R China
[5] Natl Univ Singapore Suzhou, Res Inst, Suzhou 215123, Jiangsu, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2015年 / 349卷
基金：
新加坡国家研究基金会;
关键词：
CdS@TiO2; Core shell nanocomposite; Controllable shell thickness; Visible-light photocatalyst; CDS QUANTUM DOTS; HYDROGEN-PRODUCTION; TITANIUM-DIOXIDE; TIO2; PHOTOCATALYSIS; RECENT PROGRESS; HIGH-PURITY; SEMICONDUCTOR; WATER; PHENOL; COMPOSITE;
D O I：
10.1016/j.apsusc.2015.04.207
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：
Amorphous TiO2 layers with a controllable thickness from 3.5 to 40 nm were coated on the one-dimensional CdS nanorods surface under mild conditions. Compared to the bare CdS nanorods, the as-prepared CdS@TiO2 nanorods exhibit enhanced photocatalytic activities for phenol photodecomposition under visible light irradiation. The improved photoactivity is ascribed to the efficient separation of photogenerated electron and hole charge carriers between CdS cores and TiO2 shells. This study promises a simple approach to fabricating CdS@TiO2 core-shell structure nanocomposites, and can be applied for other semiconductor cores with TiO2 shells. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：279 / 286
页数：8
相关论文
共 66 条
[1]   Photodegradation of phenol in water using silica-supported titania catalysts [J].
Alemany, LJ ;
Banares, MA ;
Pardo, E ;
Martin, F ;
GalanFereres, M ;
Blasco, JM .
APPLIED CATALYSIS B-ENVIRONMENTAL, 1997, 13 (3-4) :289-297
[2]   Visible-light photocatalysis in nitrogen-doped titanium oxides [J].
Asahi, R ;
Morikawa, T ;
Ohwaki, T ;
Aoki, K ;
Taga, Y .
SCIENCE, 2001, 293 (5528) :269-271
[3]   Nitrogen-Doped Titanium Dioxide as Visible-Light-Sensitive Photocatalyst: Designs, Developments, and Prospects [J].
Asahi, Ryoji ;
Morikawa, Takeshi ;
Irie, Hiroshi ;
Ohwaki, Takeshi .
CHEMICAL REVIEWS, 2014, 114 (19) :9824-9852
[4]   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
[5]   Synthesis of Coupled Semiconductor by Filling 1D TiO2 Nanotubes with CdS [J].
Banerjee, Subarna ;
Mohapatra, Susanta K. ;
Das, Prajna P. ;
Misra, Mano .
CHEMISTRY OF MATERIALS, 2008, 20 (21) :6784-6791
[6]   Self-templated synthesis of nanoporous CdS nanostructures for highly efficient photocatalytic hydrogen production under visible [J].
Bao, Ningzhong ;
Shen, Liming ;
Takata, Tsuyoshi ;
Domen, Kazunari .
CHEMISTRY OF MATERIALS, 2008, 20 (01) :110-117
[7]   HIGH-PURITY, MONODISPERSE TIO2 POWDERS BY HYDROLYSIS OF TITANIUM TETRAETHOXIDE .1. SYNTHESIS AND PHYSICAL-PROPERTIES [J].
BARRINGER, EA ;
BOWEN, HK .
LANGMUIR, 1985, 1 (04) :414-420
[8]   Effect of CdS film thickness on the photoexcited carrier lifetime of TiO2/CdS core-shell nanowires [J].
Challa, Kiran Kumar ;
Goswami, Syamanta K. ;
Oh, Eunsoon ;
Kim, Eui-Tae .
APPLIED PHYSICS LETTERS, 2011, 99 (15)
[9]   Synthesis of Visible-Light Responsive Graphene Oxide/TiO2 Composites with p/n Heterojunction [J].
Chen, Chao ;
Cai, Weimin ;
Long, Mingce ;
Zhou, Baoxue ;
Wu, Yahui ;
Wu, Deyong ;
Feng, Yujie .
ACS NANO, 2010, 4 (11) :6425-6432
[10]   Recent Progress in the Synthesis of Spherical Titania Nanostructures and Their Applications [J].
Chen, Dehong ;
Caruso, Rachel A. .
ADVANCED FUNCTIONAL MATERIALS, 2013, 23 (11) :1356-1374
1234567