Squaraine dye sensitized TiO2 nanocomposites with enhanced visible-light photocatalytic activity

被引：20
作者：
Li, Zhongyu [1 ,2 ]
Fang, Yongling [1 ]
Xu, Song [1 ]
机构：
[1] Changzhou Univ, Dept Petrochem Engn, Jiangsu Key Lab Adv Catalyt Mat & Technol, Changzhou 213164, Peoples R China
[2] Changzhou Expans New Stuff Technol Ltd Co, Changzhou 213122, Peoples R China
来源：
MATERIALS LETTERS | 2013年 / 93卷
关键词：
Squaraine dye; Titanium dioxide; Nanocomposites; Visible-light photocatalytic activity; Composite materials; NANOPARTICLES; DEGRADATION;
D O I：
10.1016/j.matlet.2012.11.135
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A novel 1,3-bis(N-3H-3,3-dimethyl-2-methylene indolenine) squaraine dye (ISQ) sensitized TiO2 nanocomposites (ISQ/TiO2) were facilely prepared by mixing the solution of ISQ and TiO2 nanoparticle suspension in ethanol. The crystal structure, morphology and UV-vis diffuse reflectance spectroscopy of ISQ/TiO2 nanocomposites were analyzed. The XRD results showed that the synthesized ISQ/TiO2 nanocomposites were mixture of anatase and rutile crystals. The photocatalytic activity of ISQ/TiO2 nanocomposites was investigated by degrading methylene blue (MB) under visible-light irradiation (lambda > 400 nm). The photo-response of the ISQ/TiO2 nanocomposites was remarkably extended to visible-light region, and the photocatalytic activity of the ISQ/TiO2 nanocomposites was significantly enhanced. The photodegradation rate of MB for the ISQ/TiO2 nanocomposites reached approximately 98% after 2 h of visible-light irradiation. Furthermore, ISQ/TiO2 nanocomposites showed excellent photocatalytic stability after 5 successive cycles under visible-light. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：345 / 348
页数：4
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