Colorimetric Detection of Pb2+ Using Glutathione Functionalized Gold Nanoparticles

被引：344

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

来源：

ACS APPLIED MATERIALS & INTERFACES | 2010年 / 2卷 / 05期

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：

082905 [生物质能源与材料];

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

页码：1466 / 1470

页数：5

共 32 条

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Ultrasensitive Pb2+ detection by glutathione-capped quantum dots [J].