Colorimetric Detection of Pb2+ Using Glutathione Functionalized Gold Nanoparticles

被引:322
作者
Chai, Fang [1 ,2 ]
Wang, Chungang [1 ]
Wang, Tingting [1 ]
Li, Lu [1 ]
Su, Zhongmin [1 ]
机构
[1] NE Normal Univ, Inst Funct Mat Chem, Fac Chem, Changchun 130024, Peoples R China
[2] Harbin Normal Univ, Coll Chem & Chem Engn, Harbin 150025, Peoples R China
基金
中国国家自然科学基金;
关键词
lead(II) ion; glutathione; gold nanoparticle; colorimetry; detection; SILVER NANOPARTICLES; ION HG2+; MERCURY(II); SENSOR; PROBE; WATER;
D O I
10.1021/am100107k
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
A facile, cost-effective and sensitive colorimetric detection method for Pb2+ has been developed by using glutathione functionalized gold nanoparticles (GSH-GNPs). The sensitivity and selectivity of detection were investigated in detail. The GSH-GNPs could be induced to aggregate immediately in the presence of Pb2+, especially after the addition of 1 M NaCl aqueous solution. The Pb2+ could be detected by colorimetric response of GNPs that could be monitored by a UV vis spectrophotometer or even naked eyes, and the detection limit could reach 100 nM. The GSH-GNPs bound by Pb2+ showed excellent selectivity compared to other metal ions (Hg2+, Mg2+, Zn2+, Ni2+, Cu2+, Co2+, Ca2+, Mn2+, Fe2+, Cd2+, Ba2+, and Cr3+), which led to prominent color change. This provided a simple and effective colorimetric sensor (no enzyme or DNA) for on-site and real-time detection of Pb2+. Most importantly, this probe was also applied to determine the Pb2+ in the lake samples with low interference and high sensitivity.
引用
收藏
页码:1466 / 1470
页数:5
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