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Photoproduction of iodine with nanoparticulate semiconductors and insulators

Author(s): Karunakaran Chockalingam | Anilkumar Premkumar | Gomathisankar Paramasivan

Journal: Chemistry Central Journal
ISSN 1752-153X

Volume: 5;
Issue: 1;
Start page: 31;
Date: 2011;
Original page

Abstract The crystal structures of different forms of TiO2 and those of BaTiO3, ZnO, SnO2, WO3, CuO, Fe2O3, Fe3O4, ZrO2 and Al2O3 nanoparticles have been deduced by powder X-ray diffraction. Their optical edges have been obtained by UV-visible diffuse reflectance spectra. The photocatalytic activities of these oxides and also those of SiO2 and SiO2 porous to oxidize iodide ion have been determined and compared. The relationships between the photocatalytic activities of the studied oxides and the illumination time, wavelength of illumination, concentration of iodide ion, airflow rate, photon flux, pH, etc., have been obtained. Use of acetonitrile as medium favors the photogeneration of iodine.

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