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Effect of inorganic ions, H(2)O(2) and pH on the photocatalytic inactivation of Escherichia coli with silver impregnated combustion synthesized TiO(2) catalyst

Sontakke, Sharad and Modak, Jayant and Madras, Giridhar (2011) Effect of inorganic ions, H(2)O(2) and pH on the photocatalytic inactivation of Escherichia coli with silver impregnated combustion synthesized TiO(2) catalyst. In: Applied Catalysis B: Environmental, 106 (3-4). pp. 453-459.

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Official URL: http://dx.doi.org/10.1016/j.apcatb.2011.06.003

Abstract

The photocatalytic antibacterial activity of Ag impregnated combustion synthesized TiO(2) (0.25 g/L) was studied against Escherichia coil in presence of UV irradiation. The effect of various parameters, such as anions, canons, hydrogen peroxide and pH, on the photocatalytic inactivation was investigated. The addition of inorganic ions showed a negative effect on inactivation. Among anions, the presence of chloride ions was observed to have a maximum negative effect and reduced the inactivation considerably. Among cations, the bacterial inactivation reduced significantly in the presence of Ca(2+) ions. Hydrogen peroxide addition in combination with Ag/TiO(2) photocatalysis, however, improved the inactivation. Photocatalysis with high concentration of H(2)O(2) yielded complete bacterial inactivation within few minutes. The photocatalytic inactivation of E. coil was not affected by variation in pH. (C) 2011 Elsevier B.V. All rights reserved.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science B.V..
Keywords: Photocatalysis;Escherichia coli;Combustion synthesis; Ag/TiO(2);Anions;Cations;H(2)O(2);pH
Department/Centre: Division of Mechanical Sciences > Chemical Engineering
Date Deposited: 15 Sep 2011 10:54
Last Modified: 15 Sep 2011 10:54
URI: http://eprints.iisc.ernet.in/id/eprint/40448

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