Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 64, Issue 1-2, Pages 57-65Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2005.10.025
Keywords
photocatalysis; disinfection; indoor air; airborne microorganisms; silver ions
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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. (c) 2005 Elsevier B.V. All rights reserved.
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