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Catalytic inactivation of bacteria using Pd-modified titania

Paper ID Volume ID Publish Year Pages File Format Full-Text
51495 46844 2009 6 PDF Available
Title
Catalytic inactivation of bacteria using Pd-modified titania
Abstract

Pd and Pt-modified TiO2 were compared with un-modified TiO2 for the photocatalytic sterilization of Escherichia coli in water. Pd/TiO2 was found to work significantly faster than Pt/TiO2, and was also active in the absence of light; indicating an alternative mechanism to conventional titania photocatalysis. The Pd/TiO2 catalyst temporarily lost bactericidal activity after each use, but was re-activated by exposure to air prior to reuse. A direct correlation between oxidation state and antimicrobial activity was indicated for Pd/TiO2. XPS analysis confirmed the oxidation of Pd on the catalyst after exposure to air and the subsequent reduction when immersed in water.

Keywords
Titania; Bacteria; Photocatalysis; Sterilization; Palladium
First Page Preview
Catalytic inactivation of bacteria using Pd-modified titania
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 10, Issue 10, 20 May 2009, Pages 1417–1422
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis