Enhanced photocatalytic disinfection of indoor air

A silver ion doped TiO2 based photocatalyst, with improved destruction of airborne microbes, has been developed. The performance of the silver ion doped photocatalyst is demonstrated using a catalyst coated filter in a recirculating air experimental facility. Bacillus cereus, Staphylococcus aureus,...

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Bibliographic Details
Published in:Applied catalysis. B, Environmental Environmental, 2006-04, Vol.64 (1-2), p.57-65
Main Authors: Vohra, Amit, Goswami, D.Y., Deshpande, D.A., Block, S.S.
Format: Article
Language:English
Subjects:
Airborne microorganisms
Aspergillus niger
Bacillus cereus
Catalysis
Chemistry
Disinfection
Escherichia coli
Exact sciences and technology
General and physical chemistry
Indoor air
Photocatalysis
Photochemistry
Physical chemistry of induced reactions (with radiations, particles and ultrasonics)
Silver ions
Staphylococcus aureus
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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Summary:A silver ion doped TiO2 based photocatalyst, with improved destruction of airborne microbes, has been developed. The performance of the silver ion doped photocatalyst is demonstrated using a catalyst coated filter in a recirculating air experimental facility. Bacillus cereus, Staphylococcus aureus, Escherichia coli, Aspergillus niger, and MS2 Bacteriophage have been used as indexes to demonstrate the high disinfection efficiency of the enhanced photocatalysis process. The microbial destruction performance of the enhanced photocatalyst is found to be an order of magnitude higher than that of a conventional TiO2 photocatalyst. The process of enhanced photocatalysis can thus be used effectively against high concentrations of airborne microorganisms, making it an attractive option as a defense against bio-terrorism.
ISSN:0926-3373
1873-3883
DOI:10.1016/j.apcatb.2005.10.025