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Preparation and characterization of polypyrrole/TiO2 nanocomposite and its photocatalytic activity under visible light irradiation

Published online by Cambridge University Press:  31 January 2011

Shengying Li ,
Mingkai Chen ,
Lijun He ,
Fei Xu  and
Guohu Zhao
Shengying Li*
Affiliation:
College of Chemistry and Environmental Science, Lanzhou City University, Lanzhou 730070, China
Guohu Zhao
Affiliation:
College of Chemistry and Environmental Science, Lanzhou City University, Lanzhou 730070, China
*
a) Address all correspondence to this author. e-mail: [email protected]
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Abstract

A simple and convenient method for preparing visible light response photocatalyst polypyrrole/TiO2 (PPy/TiO2) nanocomposite was developed. The products were characterized by x-ray diffraction, transmission electron microscopy, atomic force microscopy, ultraviolet-visible, and Fourier transform infrared techniques. The results indicated that the nanohybrid was composed of anatase TiO2 and PPy and exhibited an enhanced visible light-capturing ability. Average diameters of TiO2 and PPy/TiO2 were 18 and 35 nm, respectively. The photocatalytic activity of the nanocomposite was evaluated by the degradation of methyl orange under visible light irradiation. In the presence of PPy/TiO2 nanocomposite, the degradation efficiency of methyl orange of 95.54% could be obtained under visible light irradiation within 120 min. The apparent rate constant was 2.19 × 10−2, which was better than that Degussa P25 nano-TiO2. The sensitization mechanism of PPy/TiO2 photocatalyst was discussed briefly.

Keywords

PhotochemicalPolymerTi
Type
Articles
Information
Journal of Materials Research , Volume 24 , Issue 8 , August 2009 , pp. 2547 - 2554
Copyright
Copyright © Materials Research Society 2009

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