Monodispersed Au nanoparticles decorated graphene as an enhanced sensing platform for ultrasensitive stripping voltammetric detection of mercury(II)

被引：212

作者：

Gong, Jingming ^{[1
]}

Zhou, Ting ^{[1
]}

Song, Dandan ^{[1
]}

Zhang, Lizhi ^{[1
]}

机构：

[1] Cent China Normal Univ, Minist Educ, Coll Chem, Key Lab Pesticide & Chem Biol, Wuhan 430079, Peoples R China

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2010年 / 150卷 / 02期

基金：

美国国家科学基金会;

关键词：

Monodispersed Au nanoparticles; Mercury(II); Graphene; Heavy metal; Stripping analysis; GOLD; ELECTRODE; SPECTROMETRY; REMEDIATION; FABRICATION; SPECIATION; EXPOSURE; FILM;

D O I：

10.1016/j.snb.2010.09.014

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

We demonstrate a new highly sensitive and selective Hg(II) sensor with a graphene-based nanocomposite film as the enhanced sensing platform The platform was constructed by homogenously distributing monodispersed Au nanoparticles (AuNPs) onto the two-dimensional (2D) graphene nanosheet matrix Its surface structure and electrochemical performance were systematically investigated Such a nanostructured composite film platform could combine with the advantages of AuNPs and graphene nanosheets greatly facilitate electron-transfer processes and the sensing behavior for Hg(II) detection leading to a remarkably improved sensitivity and selectivity The detection limit was found to be as low as 6 ppt (S/N = 3) much below the guideline value from the World Health Organization (WHO) The interference from other heavy metal ions such as Cu2+ Cr3+ Co2+ Fe3+ Zn2+ and I- ions associated with mercury analysis could be effectively inhibited The performance of new sensor was also evaluated by the direct detection of Hg(II) in river water specimens suggesting it is very promising for practical environmental monitoring applications (C) 2010 Elsevier B V All rights reserved

引用

页码：491 / 497

页数：7

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