Green Synthesis and Spectroscopic Studies of Ag-rGO Nanocomposites for Highly Selective Mercury (II) Sensing
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Published:2018-12-26
Issue:1
Volume:9
Page:101-108
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ISSN:2210-6812
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Container-title:Nanoscience &Nanotechnology-Asia
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language:en
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Short-container-title:NANOASIA
Author:
Mane-Gavade Shubhangi J.1, Sabale Sandip R.1, Yu Xiao-Ying2, Nikam Gurunath H.1, Tamhankar Bhaskar V.1
Affiliation:
1. P.G. Department of Chemistry, Jaysingpur College, Jaysingpur-416101 (M.S.), India 2. Earth and Biological Sciences Directorate, Pacific Northwest National Laboratory (PNNL), Richland, WA 99352, United States
Abstract
Introduction:
Herein we report the green synthesis and characterization of silverreduced
graphene oxide nanocomposites (Ag-rGO) using Acacia nilotica gum for the first time.
Experimental:
We demonstrate the Hg2+ ions sensing ability of the Ag-rGO nanocomposites form
aqueous medium. The developed colorimetric sensor method is simple, fast and selective for the
detection of Hg2+ ions in aqueous media in presence of other associated ions. A significant color
change was noticed with naked eye upon Hg2+ addition. The color change was not observed for
cations including Sr2+, Ni2+, Cd2+, Pb2+, Mg2+, Ca2+, Fe2+, Ba2+ and Mn2+indicating that only Hg2+
shows a strong interaction with Ag-rGO nanocomposites. Under the most suitable condition, the
calibration plot (A0-A) against concentration of Hg2+ was linear in the range of 0.1-1.0 ppm with a
correlation coefficient (R2) value 0.9998.
Results & Conclusion
The concentration of Hg2+ was quantitatively determined with the Limit of
Detection (LOD) of 0.85 ppm. Also, this method shows excellent selectivity towards Hg2+ over
nine other cations tested. Moreover, the method offers a new cost effective, rapid and simple approach
for the detection of Hg2+ in water samples.
Funder
University Grants Commission (UGC) DST-FIST
Publisher
Bentham Science Publishers Ltd.
Subject
General Engineering,General Materials Science
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