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

共 32 条

[11] Photocatalytic degradation of azo dye acid red 14 in water on ZnO as an alternative catalyst to TiO2 [J].

Daneshvar, N ;

Salari, D ;

Khataee, AR .

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 2004, 162 (2-3) :317-322

[12]

DHANANJAY SB, 2001, J CHEM TECHNOL BIOT, V77, P102, DOI DOI 10.1002/JCTB.532

[13] Unusual photoreactivity of zinc oxide irradiated by concentrated sunlight [J].

Dindar, B ;

Içli, S .

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 2001, 140 (03) :263-268

[14]

Hou Q, 2003, ACTA POLYM SIN, P161

[15] Visible light-sensitized semiconductor photocatalytic degradation of 2,4-dichlorophenol [J].

Li, XZ ;

Zhao, W ;

Zhao, JC .

SCIENCE IN CHINA SERIES B-CHEMISTRY, 2002, 45 (04) :421-425

[16] Photooxidation mechanism of dye alizarin red in TiO2 dispersions under visible illumination:: an experimental and theoretical examination [J].

Liu, GM ;

Li, XZ ;

Zhao, JC ;

Horikoshi, S ;

Hidaka, H .

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 2000, 153 (1-2) :221-229

[17] ESR spin-trapping detection of radical intermediates in the TiO2-assisted photo-oxidation of sulforhodamine B under visible irradiation [J].

Liu, GM ;

Zhao, JC ;

Hidaka, H .

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 2000, 133 (1-2) :83-88

[18]

Liu SH, 2004, ACTA CHIM SINICA, V62, P818

[19] Photodegradation of rhodamine B catalyzed by TiO2 thin films [J].

Ma, Y ;

Yao, JN .

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 1998, 116 (02) :167-170

[20] Photocatalytic degradation of phenol under solar radiation using microwave irradiated zinc oxide [J].

Parida, K. M. ;

Parija, S. .

SOLAR ENERGY, 2006, 80 (08) :1048-1054

← 1 2 3 4 →