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Photocatalytic Polypyrrole−TiO2−Nanoparticles Composite Thin Film Generated at the Air−Water Interface

Chowdhury, Devasish and Paul, Anumita and Chattopadhyay, Arun (2005) Photocatalytic Polypyrrole−TiO2−Nanoparticles Composite Thin Film Generated at the Air−Water Interface. Langmuir, 21 (9). pp. 4123-4128.

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Official URL: http://pubs.acs.org/doi/abs/10.1021/la0475425

Abstract

Herein, we report a new method of generation of TiO2 nanoparticles (NPs) incorporated thin films of polypyrrole (PPy) at the air−water interface. Aqueous TiO2 NPs when treated with H2O2 and left in a chamber of pyrrole vapor resulted in the formation of a film at the interface, in addition to bulk precipitate. Spectroscopic, X-ray diffraction, and electron microscopic measurements establish the formation of a thin film of PPy with the incorporation of TiO2 NPs. The TiO2-containing PPy films when transferred onto glass substrates were able to photo catalyze the decomposition of aqueous organic dyes: methyl orange and methylene blue. Further, these films could also photo catalyze the oxidation of iodide to triiodide ions in aqueous potassium iodide solution. We find that the PPy−TiO2 composite films catalyze the reactions in the presence of light more efficiently than a suspension of TiO2 NPs.

Item Type:Article
Subjects:Material Science > Functional and hybrid materials
Material Science > Nanochemistry
Divisions:Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:4372
Deposited By:JNCASR
Deposited On:02 Apr 2009 12:33
Last Modified:09 Apr 2009 06:51

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