Highly sensitive and selective colorimetric detection of dual metal ions (Hg2+ and Sn2+) in water: an eco-friendly approach

Rintumoni Paw; Moushumi Hazarika; Purna K. Boruah; Amlan Jyoti Kalita; Ankur K. Guha; Manash R. Das; Chandan Tamuly

doi:10.1039/D0RA09926K

Highly sensitive and selective colorimetric detection of dual metal ions (Hg²⁺ and Sn²⁺) in water: an eco-friendly approach†

Rintumoni Paw,

^ac Moushumi Hazarika,

^a Purna K. Boruah,

^d Amlan Jyoti Kalita,

^b Ankur K. Guha,

^b Manash R. Das

^d and Chandan Tamuly

*^ac

Author affiliations

* Corresponding authors

^a Natural Product Chemistry Section, CSIR-North East Institute of Science and Technology, Itanagar, Arunachal Pradesh-791110, India
E-mail: c.tamuly@gmail.com

^b Dept of Chemistry, Cotton University, Guwahati, Assam-781001, India

^c Academic of Scientific & Innovative Research, CSIR-North East Institute of Science and Technology, Jorhat, Assam-785006, India

^d Material Science and Technology Division, CSIR-North East Institute of Science and Technology, Jorhat, Assam-785006, India

Abstract

Application of an alliin-based precursor for the synthesis of silver nanoparticles (Ag NPs) which is an emerging, reliable and rapid sensor of heavy metal ion contaminants in water is reported here. The Ag NPs were characterized by using UV-visible spectroscopy, X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy and Raman spectroscopy analysis techniques. The Ag NPs simultaneously and selectively detect Hg²⁺ and Sn²⁺ ions from aqueous solution. The sensitivity and selectivity of the prepared Ag NPs towards other representative transition-metal ions, alkali metal ions and alkaline earth metal ions were also studied. For more precise evidence, a density functional theory study was carried out to understand the possible mechanism and interaction in the detection of Hg²⁺ and Sn²⁺ by Ag NPs. The limits of detection for Hg²⁺ and Sn²⁺ ions were found as 15.7 nM and 11.25 nM, respectively. This assay indicates the possible use of garlic extract-synthesized Ag NPs for sensing Hg²⁺ and Sn²⁺ in aqueous solution very significantly. So, the simple, green, eco-friendly and easy method to detect the dual metal ions may further lead to a potential sensor of heavy metal ion contaminants in water of industrial importance.

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Article information

DOI: https://doi.org/10.1039/D0RA09926K
Article type: Paper
Submitted: 23 Nov 2020
Accepted: 29 Mar 2021
First published: 20 Apr 2021
This article is Open Access

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RSC Adv., 2021,11, 14700-14709

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Highly sensitive and selective colorimetric detection of dual metal ions (Hg²⁺ and Sn²⁺) in water: an eco-friendly approach

R. Paw, M. Hazarika, P. K. Boruah, A. J. Kalita, A. K. Guha, M. R. Das and C. Tamuly, RSC Adv., 2021, 11, 14700 DOI: 10.1039/D0RA09926K

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