A simple visual and highly selective colorimetric detection of Hg2+ based on gold nanoparticles modified by 8-hydroxyquinolines and oxalates

Yuexia Gao; Xing Li; Yonglong Li; Tianhua Li; Yayun Zhao; Aiguo Wu

doi:10.1039/C4CC00069B

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A simple visual and highly selective colorimetric detection of Hg²⁺ based on gold nanoparticles modified by 8-hydroxyquinolines and oxalates†

Yuexia Gao,^ab Xing Li,*^a Yonglong Li,^b Tianhua Li,^ab Yayun Zhao^a and Aiguo Wu*^b

Author affiliations

* Corresponding authors

^a Faculty of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China
E-mail: lixing@nbu.edu.cn

^b Key Laboratory of Magnetic Materials and Devices, and Division of Modified Materials and Nanodevices, Ningbo Institute of Materials Technology and Engineering, Ningbo 315201, China
E-mail: aiguo@nimte.ac.cn

Abstract

Gold nanoparticles (AuNPs) modified by 8-hydroxy-quinoline (8-HQ) and stabilized by polyvinylpyrrolidone (PVP) were used for highly selective and sensitive colorimetric detection of Hg²⁺ based on the quick aggregation of AuNPs leading to a color change from wine red to gray. The limit of Hg²⁺ detection in real environmental water samples is 4.0 × 10⁻⁷ M by the naked eyes and 1.0 × 10⁻⁸ M by UV-vis spectroscopy.

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Article information

DOI: https://doi.org/10.1039/C4CC00069B
Article type: Communication
Submitted: 04 Jan 2014
Accepted: 26 Feb 2014
First published: 28 Feb 2014

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Chem. Commun., 2014,50, 6447-6450

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A simple visual and highly selective colorimetric detection of Hg²⁺ based on gold nanoparticles modified by 8-hydroxyquinolines and oxalates

Y. Gao, X. Li, Y. Li, T. Li, Y. Zhao and A. Wu, Chem. Commun., 2014, 50, 6447 DOI: 10.1039/C4CC00069B

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Chemical Communications