A Multifunctional Biocide/Sporocide and Photocatalyst Based on Titanium Dioxide (TiO2) Codoped with Silver, Carbon, and Sulfur

被引：83

作者：

Hamal, Dambar B. ^{[1
]}

Haggstrom, Johanna A. ^{[1
]}

Marchin, George L. ^{[2
]}

Ikenberry, Myles A. ^{[3
]}

Hohn, Keith ^{[3
]}

Klabunde, Kenneth J. ^{[1
]}

机构：

[1] Kansas State Univ, Dept Chem, Manhattan, KS 66506 USA

[2] Kansas State Univ, Div Biol, Manhattan, KS 66506 USA

[3] Kansas State Univ, Dept Chem Engn, Manhattan, KS 66506 USA

来源：

LANGMUIR | 2010年 / 26卷 / 04期

关键词：

VISIBLE-LIGHT PHOTOCATALYST; ESCHERICHIA-COLI; ANTIBACTERIAL ACTIVITY; BACTERICIDAL ACTIVITY; PATHOGENIC BACTERIA; DISINFECTION; NANOPARTICLES; DESTRUCTION; AG-TIO2; SYSTEM;

D O I：

10.1021/la902844r

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Composite nanostructured samples of Ag (0.5-20%)/(C, S)-TiO2 were synthesized and characterized by EDX, XRD, FT-IR, UV-vis, BET, XPS, and zeta potential measurements. Photocatalytic and biocidal tests revealed that the amount of the codoped silver (Ag+) in (C, S)-TiO2 playeda crucial, distinctive role in the photodegradation of gas-phase acetaldehyde as well as in the inactivation of Escherichia coli cells and Bacillus subtilis spores. Very interestingly, Ag/(C, S)-TiO2 nanoparticles (crystallite size < 10 nm) have shown very strong antimicrobial properties without light activation against both E. coli (log kill > 8) and B. subtilis spores (log kill > 5) for 30 min exposures, compared with P25-TiO2. Thus, for the first time, we have demonstrated that titanium dioxide (an environmentally friendly photocatalyst) codoped with silver, carbon, and Sulfur can serve as a multifunctional generic biocide as well as a visible light activated photocatalyst.

引用

页码：2805 / 2810

页数：6

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