Selective Detection of Trace Cr3+ in Aqueous Solution by Using 5,5′-Dithiobis (2-Nitrobenzoic acid)-Modified Gold Nanoparticles

被引：131

作者：

Dang, Yong-Qiang ^{[1
]}

Li, Hong-Wei ^{[1
]}

Wang, Bin ^{[1
]}

Li, Lei ^{[1
]}

Wu, Yuqing ^{[1
]}

机构：

[1] Jilin Univ, State Key Lab Supramol Struct & Mat, Changchun 130012, Peoples R China

来源：

ACS APPLIED MATERIALS & INTERFACES | 2009年 / 1卷 / 07期

关键词：

gold nanoparticles; DTNBA; colorimetric; ion detection; chromium; ATOMIC-ABSORPTION-SPECTROMETRY; WATER SAMPLES; MERCURY(II); CHROMIUM; ION; REDUCTION; PARTICLE; CR(III); SIZE;

D O I：

10.1021/am9001953

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A simply prepared gold nanoparticle-based sensor, 5,5'-dithiobis(2-nitrobenzoic acid) (DTNBA)-modified gold nanoparticles, was prepared to explore the sensitive and selective detection of metal ions using a colorimetric technique. The selective detection of trace levels (93.6 ppb) Cr3+ in aqueous solution was achieved over 15 other metal ions. The functionalized gold nanoparticles became aggregated in solution in the presence of Cr3+ by an ion-templated chelation process, which caused an easily measurable change in the extinction spectrum of the particles and provided an inherently sensitive method for Cr3+ detection in aqueous solution.

引用

页码：1533 / 1538

页数：6

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