Synthesis and photocatalytic performance of novel CdS quantum dots sensitized Bi2WO6 photocatalysts

被引：35

作者：

Ge, Lei ^{[1
]}

Liu, Jing ^{[1
]}

机构：

[1] China Univ Petr, Coll Sci, Dept Mat Sci & Engn, Beijing 102249, Peoples R China

来源：

MATERIALS LETTERS | 2011年 / 65卷 / 12期

基金：

美国国家科学基金会;

关键词：

Quantum dots; Photocatalysis; Nanoparticles; Functional; Semiconductors; VISIBLE-LIGHT IRRADIATION; THIN-FILMS; DEGRADATION;

D O I：

10.1016/j.matlet.2011.03.066

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Novel quantum dots sensitized CdS-Bi2WO6 composite photocatalysts were synthesized to improve the visible-light-driven photocatalytic performance. The products were characterized by X-ray diffraction (XRD), scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM) UV-vis diffuse reflectance spectra (DRS). The photocatalytic activities of QDs sensitized CdS-Bi2WO6 samples were investigated based on the decomposition of methyl orange under visible light irradiation (lambda > 420 nm). The DRS results revealed that CdS-Bi2WO6 samples have a red shift and stronger absorption in the visible light region. After being sensitized by quantum dots CdS, the Bi2WO6 samples showed the high efficiency for the degradation of methyl orange. This study may provide an approach to treatment of organic pollutants by using visible light. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：1828 / 1831

页数：4

共 13 条

[1] Enhanced visible light photocatalytic activity of QDS modified Bi2WO6 nanostructures [J].

Cui, Zhankui ;

Zeng, Dawen ;

Tang, Tengteng ;

Liu, Jun ;

Xie, Changsheng .

CATALYSIS COMMUNICATIONS, 2010, 11 (13) :1054-1057

[2] An Efficient Method To Form Heterojunction CdS/TiO2 Photoelectrodes Using Highly Ordered TiO2 Nanotube Array Films [J].

Gao, Xian-Feng ;

Sun, Wen-Tao ;

Hu, Zhu-Dong ;

Ai, Guo ;

Zhang, Yi-Ling ;

Feng, Shi ;

Li, Fei ;

Peng, Lian-Mao .

JOURNAL OF PHYSICAL CHEMISTRY C, 2009, 113 (47) :20481-20485

[3] CdTe Quantum Dots-Sensitized TiO2 Nanotube Array Photoelectrodes [J].

Gao, Xian-Feng ;

Li, Hong-Bo ;

Sun, Wen-Tao ;

Chen, Qing ;

Tang, Fang-Qiong ;

Peng, Lian-Mao .

JOURNAL OF PHYSICAL CHEMISTRY C, 2009, 113 (18) :7531-7535

[4] Photo-catalytic degradation of methyl orange and formaldehyde by Ag/InVO4-TiO2 thin films under visible-light irradiation [J].

Ge, Lei ;

Xu, Mingxia ;

Fang, Haibo .

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 2006, 258 (1-2) :68-76

[5] Fabrication and characterization of nano TiO2 thin films at low temperature [J].

Ge, Lei ;

Xu, Mingxia ;

Sun, Ming ;

Fang, Haibo .

MATERIALS RESEARCH BULLETIN, 2006, 41 (09) :1596-1603

[6] Nitrogen-concentration dependence on photocatalytic activity of TiO2-xNx powders [J].

Irie, H ;

Watanabe, Y ;

Hashimoto, K .

JOURNAL OF PHYSICAL CHEMISTRY B, 2003, 107 (23) :5483-5486

[7] Enhanced photocatalytic activity of Bi2WO6 loaded with Ag nanoparticles under visible light irradiation [J].

Ren, Jia ;

Wang, Wenzhong ;

Sun, Songmei ;

Zhang, Ling ;

Chang, Jiang .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2009, 92 (1-2) :50-55

[8] Rapid preparation of Bi2WO6 photocatalyst with nanosheet morphology via microwave-assisted solvothermal synthesis [J].

Wu, Ling ;

Bi, Jinhong ;

Li, Zhaohui ;

Wang, Xuxu ;

Fu, Xianzhi .

CATALYSIS TODAY, 2008, 131 (1-4) :15-20

[9] Pore-wall chemistry and photocatalytic activity of mesoporous titania molecular sieve films [J].

Yu, JC ;

Wang, XC ;

Fu, XZ .

CHEMISTRY OF MATERIALS, 2004, 16 (08) :1523-1530

[10] Preparation and performances of mesoporous TiO2 film photocatalyst supported on stainless steel [J].

Zhang, L ;

Zhu, YF ;

He, Y ;

Li, W ;

Sun, HB .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2003, 40 (04) :287-292

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