TY - JOUR
T1 - Red Mud-Reduced Graphene Oxide Nanocomposites for the Electrochemical Sensing of Arsenic
AU - Deshmukh, Sujit
AU - Banerjee, Debosmita
AU - Bhattacharya, Gourav
AU - Fishlock, Sam
AU - Barman, Anjam
AU - McLaughlin, James
AU - Roy, Susanta S
PY - 2020/5/22
Y1 - 2020/5/22
N2 - 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.
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.
KW - arsenic
KW - electrochemical detection
KW - electron-transfer kinetics
KW - hematite
KW - red mud
KW - sensitivity
UR - http://www.scopus.com/inward/record.url?scp=85087589476&partnerID=8YFLogxK
U2 - https://doi.org/10.1021/acsanm.0c00165
DO - https://doi.org/10.1021/acsanm.0c00165
M3 - Article
VL - 3
SP - 4084
EP - 4090
JO - ACS Applied Nano Materials
JF - ACS Applied Nano Materials
SN - 2574-0970
IS - 5
ER -