Enhanced photocatalytic inactivation of bacterial spores on surfaces in air

被引：91

作者：

Vohra, A ^{[1
]}

Goswami, DY ^{[1
]}

Deshpande, DA ^{[1
]}

Block, SS ^{[1
]}

机构：

[1] Univ Florida, Dept Mech & Aerosp Engn, Solar Energy & Energy Convers Lab, Gainesville, FL 32611 USA

来源：

JOURNAL OF INDUSTRIAL MICROBIOLOGY & BIOTECHNOLOGY | 2005年 / 32卷 / 08期

关键词：

photocatalysis; metal-doped TiO2; silver; Bacillus cereus spores; fabric; UV-A;

D O I：

10.1007/s10295-005-0006-y

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

TiO2 photocatalysis with ultraviolet (UV-A) light has proven to be a highly effective process for complete inactivation of airborne microbes. However, the overall efficiency of the technology needs to be improved to make it more attractive as a defense against bio-terrorism. The present research investigates the enhancement in the rate of destruction of bacterial spores on metal (aluminum) and fabric (polyester) substrates with metal (silver)-doped titanium dioxide and compares it to conventional photocatalysis TiO2 P25/ + UV-A) and UV-A photolysis. Bacillus cereus bacterial spores were used as an index to demonstrate the enhanced disinfection efficiency. The results indicate complete inactivation of B. cereus spores with the enhanced photocatalyst. The enhanced spore destruction rate may be attributed to the highly oxidizing radicals generated by the doped TiO2.

引用

页码：364 / 370

页数：7

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