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Issue 111, 2015
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Biologically synthesized silver nanoparticle-based colorimetric sensor for the selective detection of Zn2+

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Abstract

A simple, selective and cost effective colorimetric sensor has been investigated for the detection of Zn2+ using biologically synthesized silver nanoparticles (AgNPs). The AgNPs were prepared from the leaf extract of Amomum subulatum via two different procedures i.e., at room temperature and by a heat treatment procedure. The AgNPs prepared through the heat treatment procedure exhibited efficient results. The as synthesized AgNPs were studied by simple UV-vis spectroscopy which showed an intense absorption band at 425 nm which was further confirmed by FT-IR and SEM analysis. The synthesized AgNPs exhibited a good colorimetric sensing property towards Zn2+ by changing the color of the solution from yellowish-brown to colorless accompanying a decrease in absorption intensity. The proposed detection mechanism of the sensor has been discussed. The sensor showed an excellent linear response towards Zn2+ in the concentration range from 1 × 10−5 to 8 × 10−5 M with a correlation coefficient (R2) of 0.996. The detection limit of the method was found to be 3.5 × 10−6 M. There was no interference effect observed for Zn2+ detection in the presence of other heavy metal ions. The proposed sensor was successfully applied for the detection of Zn2+ in drinking water samples.

Graphical abstract: Biologically synthesized silver nanoparticle-based colorimetric sensor for the selective detection of Zn2+

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Publication details

The article was received on 23 ágú. 2015, accepted on 20 okt. 2015 and first published on 20 okt. 2015


Article type: Paper
DOI: 10.1039/C5RA17055A
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RSC Adv., 2015,5, 91158-91165

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    Biologically synthesized silver nanoparticle-based colorimetric sensor for the selective detection of Zn2+

    M. Ihsan, A. Niaz, A. Rahim, M. I. Zaman, M. B. Arain, Sirajuddin, T. Sharif and M. Najeeb, RSC Adv., 2015, 5, 91158
    DOI: 10.1039/C5RA17055A

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