Colorimetric detection of Ba2+, Cd2+ and Pb2+ based on a multifunctionalized Au NP sensor

Jiaoyan Qiu; Zihou Li; Lijing Miao; Hongsen Wang; Yuenan Zhang; Shasha Wu; Yujie Zhang; Xing Li; Aiguo Wu

doi:10.1039/C9AN00836E

Colorimetric detection of Ba²⁺, Cd²⁺ and Pb²⁺ based on a multifunctionalized Au NP sensor†

Jiaoyan Qiu,^ab Zihou Li,^a Lijing Miao,^a Hongsen Wang,^a Yuenan Zhang,^a Shasha Wu,^a Yujie Zhang,*^a Xing Li

*^ab and Aiguo Wu

*^a

Author affiliations

* Corresponding authors

^a Cixi Institute of Biomedical Engineering, Key Laboratory of Magnetic Materials and Devices & Key Laboratory of Additive Manufacturing Materials of Zhejiang Province, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, 1219 Zhong-guan West Road, Zhen-hai District, Ning-bo, Zhejiang 315201, P. R. China
E-mail: zhangyujie@nimte.ac.cn, aiguo@nimte.ac.cn
Fax: +86 574 86685163
Tel: +86 574 86685513

^b School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China
E-mail: lixing@nbu.edu.cn
Fax: +86 574 87609987
Tel: +86 574 87600869

Abstract

In this work, we developed a colorimetric method for the detection of three kinds of ions with one kind of detection reagent. In detail, gold nanoparticles (Au NPs) multifunctionalized with 3-mercaptonicotinic acid and 4-aminobenzo-18-crown-6 (3-MPA-abc) were prepared and used as a colorimetric sensor for the simple and rapid detection of Ba²⁺, Cd²⁺ and Pb²⁺ ions. After adding Ba²⁺/Cd²⁺/Pb²⁺, the oxygen atom in the crown ether cavity and the carboxyl group of 3-mercaptopropionic acid can react with Ba²⁺/Cd²⁺/Pb²⁺ to form coordination bonds, resulting in the aggregation of the functionalized Au NPs and the color change of Au NP solution. The LOD of the colorimetric sensor for Ba²⁺/Cd²⁺/Pb²⁺ is 20 nM, 20 nM and 50 nM by the naked eye, respectively. A good linear relationship (R² = 0.9984, R² = 0.9917, R² = 0.9934) between the absorbance ratio and Ba²⁺/Cd²⁺/Pb²⁺ concentrations indicates that our Au NP based colorimetric sensor can be used for the quantitative assay of Ba²⁺/Cd²⁺/Pb²⁺, and this detection method was successfully applied in the detection of Ba²⁺/Cd²⁺/Pb²⁺ in real environmental samples.

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DOI: https://doi.org/10.1039/C9AN00836E
Article type: Paper
Submitted: 08 May 2019
Accepted: 28 Jun 2019
First published: 28 Jun 2019

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Analyst, 2019,144, 5081-5089

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Colorimetric detection of Ba²⁺, Cd²⁺ and Pb²⁺ based on a multifunctionalized Au NP sensor

J. Qiu, Z. Li, L. Miao, H. Wang, Y. Zhang, S. Wu, Y. Zhang, X. Li and A. Wu, Analyst, 2019, 144, 5081 DOI: 10.1039/C9AN00836E

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Colorimetric detection of Ba²⁺, Cd²⁺ and Pb²⁺ based on a multifunctionalized Au NP sensor†

Abstract

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Colorimetric detection of Ba²⁺, Cd²⁺ and Pb²⁺ based on a multifunctionalized Au NP sensor

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