期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 143, 期 1, 页码 87-92出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2009.09.013
关键词
Silver nanoparticles; Ni2+; Glutathione; 1,2-Ethylenediamine; Colorimetric sensors
资金
- National Natural Science Foundation of China [20602015, 20772038]
- Scientific Research Foundation
- State Education Ministry
- Program for Distinguish Young Scientist of Hubei Province [2007ABB017]
- Program for Chenguang Young Scientist for Wuhan [200750731283]
- 863 program [2009AA06A417]
- Key Laboratory of Catalysis and Materials Science of Hubei Province
We report herein the synthesis of glutathione-stabilized silver nanoparticles (GSH-Ag NPs) in water media and colorimetric assay of Ni2+ with GSH-Ag NPs. GSH-Ag NPs were characterized by IR spectroscopy, Ultraviolet-visible spectroscopy (UV-vis), transmission electron microscopy (TEM). The freshly synthesized GSH-Ag NPs are yellow in color due to the intense surface plasmon absorption band. In the presence of Ni2+, the yellow GSH-Ag NPs solution turns to a deep orange color accompanying the broadening and red shifting of surface plasmon absorption band. However, the sensitivity of GSH-Ag NPs towards other representative transition-metal ions (Zn2+, Co2+, Cd2+, Mn2+, Hg2+, Cu2+), alkali metal ions (Li+, Na+, K+) and alkaline earth metal ions (Mg2+, Ca2+, Sr2+, Ba2+) can be negligible, except Co2+ having a modest interference. Also the effect of the concentration of Ni2+ to the silver nanoparticles was considered and the limit of detection for Ni2+ by GSH-Ag NPs is 7.5 x 10(-5) mol L-1. Meanwhile, an interesting phenomenon that 1,2-ethylenediamine can make the aggregated nanoparticles redispersed was observed, and possible mechanism of the response of the aggregated GSH-Ag NPs to 1.2-ethylenediamine is discussed. (C) 2009 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据