Red Mud-Reduced Graphene Oxide Nanocomposites for the Electrochemical Sensing of Arsenic

Sujit Deshmukh; Debosmita Banerjee; Gourav Bhattacharya; Sam Fishlock; Anjam Barman; James McLaughlin; Susanta S Roy

doi:https://doi.org/10.1021/acsanm.0c00165

Red Mud-Reduced Graphene Oxide Nanocomposites for the Electrochemical Sensing of Arsenic

Sujit Deshmukh, Debosmita Banerjee, Gourav Bhattacharya, Sam Fishlock, Anjam Barman, James McLaughlin, Susanta S Roy

Research output: Contribution to journal › Article

Abstract

This work demonstrates the applicability of red-mud-reduced graphene oxide (RM-rGO) nanocomposites (NCs) for the reliable and selective electrochemical (EC) detection of arsenic. The new NC material shows excellent anti-interference activity toward arsenic (As3+) ions with the cooccurrence of other common cations (Cd2+, Cr2+, Zn2+, Pb2+, and Hg2+). Especially, the NC is exceptionally selective for As3+ ions in the presence of Cu2+ ions, which is stated to be the main interfering agent in the EC detection of As3+. Under optimal experimental conditions, the new NC displays a high sensitivity (2.49 μA ppb-1) as well as a very low detection limit (0.07 ppb) toward As3+ detection. This excellent EC performance of the composite is accounted for by the high adsorption proficiency of hematite (Fe2O3)-phase-rich red mud nanoparticles and enhanced electron-transfer kinetics due to the presence of rGO.

Original language	English
Pages (from-to)	4084-4090
Number of pages	7
Journal	ACS Applied Nano Materials
Volume	3
Issue number	5
Early online date	10 Apr 2020
DOIs	https://doi.org/10.1021/acsanm.0c00165
Publication status	Published - 22 May 2020

Keywords

arsenic
electrochemical detection
electron-transfer kinetics
hematite
red mud
sensitivity

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https://doi.org/10.1021/acsanm.0c00165

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acsanm.0c00165
Accepted author manuscript, 1.23 MB
Embargo ends: 10/04/21

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Deshmukh, S., Banerjee, D., Bhattacharya, G., Fishlock, S., Barman, A., McLaughlin, J., & Roy, S. S. (2020). Red Mud-Reduced Graphene Oxide Nanocomposites for the Electrochemical Sensing of Arsenic. ACS Applied Nano Materials, 3(5), 4084-4090. https://doi.org/10.1021/acsanm.0c00165

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AU - Fishlock, Sam

AU - Barman, Anjam

AU - McLaughlin, James

AU - Roy, Susanta S

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AB - This work demonstrates the applicability of red-mud-reduced graphene oxide (RM-rGO) nanocomposites (NCs) for the reliable and selective electrochemical (EC) detection of arsenic. The new NC material shows excellent anti-interference activity toward arsenic (As3+) ions with the cooccurrence of other common cations (Cd2+, Cr2+, Zn2+, Pb2+, and Hg2+). Especially, the NC is exceptionally selective for As3+ ions in the presence of Cu2+ ions, which is stated to be the main interfering agent in the EC detection of As3+. Under optimal experimental conditions, the new NC displays a high sensitivity (2.49 μA ppb-1) as well as a very low detection limit (0.07 ppb) toward As3+ detection. This excellent EC performance of the composite is accounted for by the high adsorption proficiency of hematite (Fe2O3)-phase-rich red mud nanoparticles and enhanced electron-transfer kinetics due to the presence of rGO.

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