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SELECTIVE AND SENSITIVE MULTISENSOR FOR TOXIC Cr (III) ION USING GREEN SILVER NANOPARTICLES

Abstract

In this work, we present an optical, fluorescent and electrochemical sensing of Cr (III) ion by green synthesized of silver nanoparticles (AgNP) using Lycopersicon esculentum (LE) extract without any surface functionalization. The synthesized AgNP-LE were analyzed by various techniques such as UV-visible absorption spectra, Infrared spectroscopy, X-ray diffraction technique and Transmission electron microscopy. The principle behind the sensing involves the dispersion of nanoparticles followed by the aggregation of Cr (III) ion leading to the redshift of surface plasmon resonance (SPR) peak in UV-vis.absorption spectra. The fluorescent sensing of Cr (III) ion using AgNP-LE was also studied by the changes in the fluorescence intensity. The electrochemical studies were carried out using AgNP-LE modified platinum electrode. Linear calibration range was focused over the range of 10 to 90µM and the limit of detection was found to be 0.804 µM using differential pulse voltammetry. This simple and sensitive method involves high selectivity towards Cr (III) ion over other metal ions. The modified sensor was also studied over real samples to determine the presence of Cr (III) ions. The synthesized AgNP-LE also exhibited antibacterial property against waterborne pathogens like Escherichia coli and Staphylococcus aureus extracted from the water sample collected from the Ashtamudi lake, Kollam; Kerala.

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Publication details

The article was received on 06 Jun 2018, accepted on 06 Jul 2018 and first published on 10 Jul 2018


Article type: Paper
DOI: 10.1039/C8EW00374B
Citation: Environ. Sci.: Water Res. Technol., 2018, Accepted Manuscript
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    SELECTIVE AND SENSITIVE MULTISENSOR FOR TOXIC Cr (III) ION USING GREEN SILVER NANOPARTICLES

    A. Aravind, M. Sebastian and B. Mathew, Environ. Sci.: Water Res. Technol., 2018, Accepted Manuscript , DOI: 10.1039/C8EW00374B

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