Virus inactivation by silver doped titanium dioxide nanoparticles for drinking water treatment

被引：173
作者：
Liga, Michael V. [1 ]
Bryant, Erika L. [2 ]
Colvin, Vicki L. [2 ]
Li, Qilin [1 ]
机构：
[1] Rice Univ, Dept Civil & Environm Engn, Houston, TX 77005 USA
[2] Rice Univ, Dept Chem, Houston, TX 77005 USA
来源：
WATER RESEARCH | 2011年 / 45卷 / 02期
关键词：
Drinking water; Nanotechnology; Photocatalysis; Silver; Titanium dioxide; Virus; PHOTOCATALYTIC ACTIVITY; ESCHERICHIA-COLI; IMMOBILIZED TIO2; UV DISINFECTION; OXIDATION; DEPOSITS; AG; BACTERIOPHAGES; DEGRADATION; KINETICS;
D O I：
10.1016/j.watres.2010.09.012
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Photocatalytic inactivation of viruses and other microorganisms is a promising technology that has been increasingly utilized in recent years. In this study, photocatalytic silver doped titanium dioxide nanoparticles (nAg/TiO2) were investigated for their capability of inactivating Bacteriophage MS2 in aqueous media. Nano-sized Ag deposits were formed on two commercial TiO2 nanopowders using a photochemical reduction method. The MS2 inactivation kinetics of nAg/TiO2 was compared to the base TiO2 material and silver ions leached from the catalyst. The inactivation rate of MS2 was enhanced by more than 5 fold depending on the base TiO2 material, and the inactivation efficiency increased with increasing silver content. The increased production of hydroxyl free radicals was found to be responsible for the enhanced viral inactivation. (c) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：535 / 544
页数：10
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