Photocatalytic activity of polymer-modified ZnO under visible light irradiation

被引：190

作者：

Qiu, Rongliang ^{[1
]}

Zhang, Dongdong ^{[1
]}

Mo, Yueqi ^{[2
]}

Song, Lin ^{[1
,3
]}

Brewer, Eric ^{[4
]}

Huang, Xiongfei ^{[1
]}

Xiong, Ya ^{[1
]}

机构：

[1] Sun Yat Sen Univ, Sch Environm Sci & Engn, Guangzhou 510275, Guangdong, Peoples R China

[2] S China Univ Technol, Coll Mat Sci & Engn, Guangzhou 510640, Peoples R China

[3] Jinan Univ, Dept Environm Engn, Guangzhou 510630, Peoples R China

[4] Viridian Environm LLC, Arlington, VA 22207 USA

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2008年 / 156卷 / 1-3期

关键词：

photocatalytic; modify; polymer; ZnO; visible light;

D O I：

10.1016/j.jhazmat.2007.11.114

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Photocatalytic removal of phenol, rhodamine B, and methyl orange was studied using the photocatalyst ZnO/poly-(fluorene-co-thiophene) (PFT) under visible light. After 2 h irradiation with three 1 W LED (light-emitting diode) lights, about 40% removal of both phenol and methyl orange was achieved; rhodamine B was completely degraded to rhodamine. Diffuse reflectance spectra showed that the absorbance range of PFr/ZnO was expanded from 387 run (ZnO) to about 500 nm. Photoluminescent spectra and photoluminescent quantum efficiency indicated that electrons were transferred from PFT to the conduction band of ZnO. Electron spin resonance (ESR) signals of spin-trapped paramagnetic species with 5,5-dimethyl-1-pyrroline-N-oxide (DMPO) evidenced that the OH center dot radicals were indeed formed in the PFr/ZnO system under visible light irradiation. A working mechanism involving excitation of PFT, followed by charge injection into the ZnO conduction band is proposed. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：80 / 85

页数：6

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