Visible light photo-and bioactivity of Ag/TiO2 nanocomposite with various silver contents

被引：89
作者：
Ashkarran, Ali Akbar [1 ]
Aghigh, Seyed Mahyad [1 ]
Kavianipour, Mona [1 ]
Farahani, Neda Jalali [1 ]
机构：
[1] Islamic Azad Univ, Sci & Res Branch, Plasma Phys Res Ctr, Tehran, Iran
来源：
CURRENT APPLIED PHYSICS | 2011年 / 11卷 / 04期
关键词：
Ag/TiO2; nanocomposite; Arc discharge; Sol-gel; Heterogeneous photocatalysis; Antibacterial activity; ELECTRICAL ARC-DISCHARGE; PHOTOCATALYTIC ACTIVITY; BACTERICIDAL ACTIVITY; ANTIBACTERIAL BEHAVIOR; ESCHERICHIA-COLI; TIO2; NANOPARTICLES; CARBON; FILMS; WATER;
D O I：
10.1016/j.cap.2011.01.042
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Ag/TiO2 nanocomposite with various silver contents was synthesized by combination of sol-gel and the novel arc discharge methods in liquid. The Ag/TiO2 nanoparticles were characterized by X-Ray diffraction (XRD), Brunauer Emmett Teller (BET), transmission electron microscope (TEM) and ultra violet-visible absorption spectroscopy (UV-Vis). The visible light antibacterial activities and photocatalytic properties were successfully demonstrated for the inactivation of Escherichia coli (E-coli) bacteria and Rhodamine B (Rh. B). The results revealed that the Ag/TiO2 nanoparticles extended the light absorption spectrum toward the visible region and significantly enhanced the inactivation of E-coli bacteria under visible light irradiation. 0.15 gr Ag/TiO2 nanoparticles revealed best antibacterial activity while 0.05 gr Ag/TiO2 nanoparticles exhibited highest photocatalytic efficiency. The significant enhancement in the photocatalytic activity and antibacterial properties of Ag/TiO2 nanoparticles under visible light irradiation can be ascribed to the effect of noble metal Ag by acting as electron traps in TiO2 band gap. A mechanism for photocatalytic degradation of organic pollutants and antibacterial activity over Ag/TiO2 nanoparticles was proposed based on our observations. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：1048 / 1055
页数：8
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