Facile synthesis of Ag nanoparticles supported on MWCNTs with favorable stability and their bactericidal properties

被引：42

作者：

Li, Zhenzi ^{[1
]}

Fan, Lijun ^{[1
]}

Zhang, Tao ^{[1
]}

Li, Kang ^{[1
]}

机构：

[1] Harbin Med Univ, Dept Epidemiol & Biostat, Harbin 150086, Peoples R China

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2011年 / 187卷 / 1-3期

基金：

中国国家自然科学基金;

关键词：

Ag nanoparticle; Multi-walled carbon nanotube; Bactericidal property; Favorable stability; Escherichia coli; WALLED CARBON NANOTUBES; SOL-GEL METHOD; SILVER NANOPARTICLES; INFRARED-SPECTROSCOPY; SURFACE-CHEMISTRY; COLLOIDAL SILVER; RESONANCE RAMAN; FUNCTIONALIZATION; GOLD; POLYMERIZATION;

D O I：

10.1016/j.jhazmat.2011.01.050

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Stable Ag nanoparticles supported on multi-walled carbon nanotubes (MWCNTs) have been successfully synthesized by calcinations of the complexes of Ag cation and acid-treated MWCNTs under sparging N-2. The nanocomposites are characterized in detail by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and UV-visible absorption spectroscopy. The results indicate that Ag nanoparticles are relatively homogeneously dispersed on the surface of MWCNTs. The bactericidal properties of Ag/MWCNT nanocomposites are investigated with disk diffusion assay on the suspension samples inoculated with Escherichia coli. The results show that Ag/MWCNTs-500 nanocomposites possess excellent bactericidal property because of their suitable particle size (15 nm). Moreover, Ag nanoparticles supported on MWCNTs are very stable for half a year. What is more, the bactericidal effect was enhanced obviously under solar irradiation. This is because MWCNTs can absorb near-infrared light to kill parts of bacteria. A possible formation mechanism is also proposed in this article. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：466 / 472

页数：7

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