Enhanced Photocatalysis of Electrospun Ag-ZnO Heterostructured Nanofibers

被引：541

作者：

Lin, Dandan ^{[1
]}

Wu, Hui ^{[1
]}

Zhang, Rut ^{[1
]}

Pan, Wei ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China

来源：

CHEMISTRY OF MATERIALS | 2009年 / 21卷 / 15期

基金：

中国国家自然科学基金;

关键词：

THIN-FILMS; SILVER NANOPARTICLES; METHYL-ORANGE; SEMICONDUCTOR; DEGRADATION; PHOTODEGRADATION; PERFORMANCE; POLLUTANTS; PARTICLES; DYE;

D O I：

10.1021/cm900225p

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：

A unique dimer-type heterostructure of Ag-ZnO nanofibers with a diameter of 80-150 nm and coupled Ag nanoparticles in the size range from several to 15 nm have been fabricated by a facile electrospinning method. Rhodamine B (RhB) was employed as a representative dye pollutant to evaluate the ultraviolet (UV) photocatalytic activity of Ag-ZnO nanofibers. It was found that the heterojunction structure promoted the charge separation as well as the photon efficiency, allowing both the photogenerated electrons and holes to participate in the overall photocatalytic reaction. The optimal photocatalytic activity of Ag-ZnO nanofibers exceeded that of pure ZnO nanofibers by a factor of more than 25. A possible mechanism for the enhanced photocatalytic activity of ZnO by Ag was proposed.

引用

页码：3479 / 3484

页数：6

共 40 条

[31] Enhanced photocatalytic activity of Ti1-xVxO2 solid solution on the degradation of acetone [J].

Yu, JC ;

Lin, J ;

Kwok, RWM .

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 1997, 111 (1-3) :199-203

[32] Fabrication and characterization of Ag-TiO2 multiphase nanocomposite thin films with enhanced photocatalytic activity [J].

Yu, JG ;

Xiong, JF ;

Cheng, B ;

Liu, SW .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2005, 60 (3-4) :211-221

[33] Single-crystalline TiO2 nanorods: Highly active and easily recycled photocatalysts [J].

Yu, Yuxiang ;

Xu, Dongsheng .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2007, 73 (1-2) :166-171

[34] Mesoporous TiO2/SiO2 composite nanofibers with selective photocatalytic properties [J].

Zhan, Sihui ;

Chen, Dairong ;

Jiao, Xiuling ;

Song, Yang .

CHEMICAL COMMUNICATIONS, 2007, (20) :2043-2045

[35] Preparation and photocatalytic properties of a nanometer ZnO-SnO2 coupled oxide [J].

Zhang, ML ;

An, TC ;

Hu, XH ;

Wang, C ;

Sheng, GY ;

Fu, JM .

APPLIED CATALYSIS A-GENERAL, 2004, 260 (02) :215-222

[36] One-pot synthesis, photoluminescence, and photocatalysis of Ag/ZnO composites [J].

Zhang, Yunyan ;

Mu, Jin .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2007, 309 (02) :478-484

[37] Photoassisted degradation of dye pollutants.: 3.: Degradation of the cationic dye rhodamine B in aqueous anionic surfactant/TiO2 dispersions under visible light irradiation:: Evidence for the need of substrate adsorption on TiO2 particles [J].

Zhao, JC ;

Wu, TX ;

Wu, KQ ;

Oikawa, K ;

Hidaka, H ;

Serpone, N .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1998, 32 (16) :2394-2400

[38] Violet luminescence emitted from Ag-nanocluster doped ZnO thin films grown on fused quartz substrates by pulsed laser deposition [J].

Zhao, SQ ;

Zhou, YL ;

Zhao, K ;

Liu, Z ;

Han, P ;

Wang, SF ;

Xiang, WF ;

Chen, ZH ;

Lü, HB ;

Cheng, BL ;

Yang, GZ .

PHYSICA B-CONDENSED MATTER, 2006, 373 (01) :154-156

[39] Ag/ZnO heterostructure nanocrystals: Synthesis, characterization, and photocatalysis [J].

Zheng, Yuanhui ;

Zheng, Lirong ;

Zhan, Yingying ;

Lin, Xingyi ;

Zheng, Qi ;

Wei, Kemei .

INORGANIC CHEMISTRY, 2007, 46 (17) :6980-6986

[40] Preparation and photocatalytic performance of Ag/ZnO nano-composites [J].

Zhou, Guang ;

Deng, Hancheng .

MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING, 2007, 10 (2-3) :90-96

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