Green synthesis of gelatin-noble metal polymer nanocomposites for sensing of Hg2+ ions in aqueous media

Rudzani Muthivhi; Sundararajan Parani; Bambesiwe May; Oluwatobi Samuel Oluwafemi

doi:10.1016/j.nanoso.2017.12.008

Green synthesis of gelatin-noble metal polymer nanocomposites for sensing of Hg²⁺ ions in aqueous media

Rudzani Muthivhi, Sundararajan Parani, Bambesiwe May, Oluwatobi Samuel Oluwafemi

Chemical Sciences

University of Johannesburg

Research output: Contribution to journal › Article › peer-review

31 Citations (Scopus)

Abstract

We herein report a greener method for the synthesis of silver (Ag), gold (Au) and platinum (Pt) nanoparticles (NPs) using gelatin and maltose as non-toxic, capping and reducing agents respectively. The formation of these noble metal NPs was monitored and confirmed by UV–visible absorption spectroscopy, Fourier transform infrared spectroscopy and transmission electron microscopy. The as-synthesized metal NPs were investigated for optical sensing of various metal ions in aqueous solutions by monitoring their surface plasmon resonance. The results showed that Ag NPs showed selective response to mercury (Hg²⁺) ions, though all the metal NPs are sensitive to all the metal ions investigated. Taking this advantage, Ag NPs were then employed for quantitative detection of Hg²⁺ ions in a local lake water and this was found to be 4.73×10⁻⁶ ppm. The proposed method is simple, cost-effective and ecofriendly to prepare Ag NPs sensor in assessing the quality of real water samples.

Original language	English
Pages (from-to)	132-138
Number of pages	7
Journal	Nano-Structures and Nano-Objects
Volume	13
DOIs	https://doi.org/10.1016/j.nanoso.2017.12.008
Publication status	Published - Feb 2018

Keywords

Gelatin
Green synthesis
Heavy metal detection
Metal nanoparticles
Optical sensing

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
General Materials Science
Condensed Matter Physics
Physical and Theoretical Chemistry

Access to Document

10.1016/j.nanoso.2017.12.008

Cite this

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title = "Green synthesis of gelatin-noble metal polymer nanocomposites for sensing of Hg2+ ions in aqueous media",

abstract = "We herein report a greener method for the synthesis of silver (Ag), gold (Au) and platinum (Pt) nanoparticles (NPs) using gelatin and maltose as non-toxic, capping and reducing agents respectively. The formation of these noble metal NPs was monitored and confirmed by UV–visible absorption spectroscopy, Fourier transform infrared spectroscopy and transmission electron microscopy. The as-synthesized metal NPs were investigated for optical sensing of various metal ions in aqueous solutions by monitoring their surface plasmon resonance. The results showed that Ag NPs showed selective response to mercury (Hg2+) ions, though all the metal NPs are sensitive to all the metal ions investigated. Taking this advantage, Ag NPs were then employed for quantitative detection of Hg2+ ions in a local lake water and this was found to be 4.73×10−6 ppm. The proposed method is simple, cost-effective and ecofriendly to prepare Ag NPs sensor in assessing the quality of real water samples.",

keywords = "Gelatin, Green synthesis, Heavy metal detection, Metal nanoparticles, Optical sensing",

author = "Rudzani Muthivhi and Sundararajan Parani and Bambesiwe May and Oluwafemi, {Oluwatobi Samuel}",

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AU - Muthivhi, Rudzani

AU - Parani, Sundararajan

AU - May, Bambesiwe

AU - Oluwafemi, Oluwatobi Samuel

PY - 2018/2

Y1 - 2018/2

N2 - We herein report a greener method for the synthesis of silver (Ag), gold (Au) and platinum (Pt) nanoparticles (NPs) using gelatin and maltose as non-toxic, capping and reducing agents respectively. The formation of these noble metal NPs was monitored and confirmed by UV–visible absorption spectroscopy, Fourier transform infrared spectroscopy and transmission electron microscopy. The as-synthesized metal NPs were investigated for optical sensing of various metal ions in aqueous solutions by monitoring their surface plasmon resonance. The results showed that Ag NPs showed selective response to mercury (Hg2+) ions, though all the metal NPs are sensitive to all the metal ions investigated. Taking this advantage, Ag NPs were then employed for quantitative detection of Hg2+ ions in a local lake water and this was found to be 4.73×10−6 ppm. The proposed method is simple, cost-effective and ecofriendly to prepare Ag NPs sensor in assessing the quality of real water samples.

AB - We herein report a greener method for the synthesis of silver (Ag), gold (Au) and platinum (Pt) nanoparticles (NPs) using gelatin and maltose as non-toxic, capping and reducing agents respectively. The formation of these noble metal NPs was monitored and confirmed by UV–visible absorption spectroscopy, Fourier transform infrared spectroscopy and transmission electron microscopy. The as-synthesized metal NPs were investigated for optical sensing of various metal ions in aqueous solutions by monitoring their surface plasmon resonance. The results showed that Ag NPs showed selective response to mercury (Hg2+) ions, though all the metal NPs are sensitive to all the metal ions investigated. Taking this advantage, Ag NPs were then employed for quantitative detection of Hg2+ ions in a local lake water and this was found to be 4.73×10−6 ppm. The proposed method is simple, cost-effective and ecofriendly to prepare Ag NPs sensor in assessing the quality of real water samples.

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KW - Green synthesis

KW - Heavy metal detection

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