Bactericidal activity of nitrogen-doped metal oxide nanocatalysts and the influence of bacterial extracellular polymeric substances (EPS)

被引：117
作者：
Liu, Yang
Li, Jin [1 ]
Qiu, Xiaofeng
Burda, Clemens
机构：
[1] Univ Wisconsin, Dept Civil Engn & Mech, Milwaukee, WI 53201 USA
[2] Case Western Reserve Univ, Dept Chem, Ctr Chem Dynam & Nanomat Res, Cleveland, OH 44106 USA
来源：
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2007年 / 190卷 / 01期
关键词：
bacteria inactivation; extracellular polymeric substances (EPS); solar light; titanium dioxide; nitrogen-doped nanoparticles;
D O I：
10.1016/j.jphotochem.2007.03.017
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The antibacterial effect of nitrogen-doped TiO2 and ZrO2 were tested on Escherichia coli and biofilm heterotrophic bacteria under solar light illumination. The rates of photocatalytic inactivation for biofilm bacteria with soluble extracellular polymeric substances (EPS) stripped off and E. coli bacteria were found to be higher than those of the biofilm bacteria with intact EPS. Measurements of both bacterial count and cellular components (carbohydrate and protein) revealed that EPS play an important role in controlling the kinetics of solar-induced photocatalysis. TiO2-x N-x and ZrO2-xNx doped with ethylenediamine as the nitrogen source showed improved photoactivity compared with TiO2-xNx using ethanolamine as the nitrogen source. (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：94 / 100
页数：7
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