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

被引：28

作者：

Deshmukh, Sujit ^{[1
]}

Banerjee, Debosmita ^{[1
]}

Bhattacharya, Gourav ^{[2
]}

Fishlock, Sam J. ^{[2
]}

Barman, Anjan ^{[3
]}

McLaughlin, James ^{[2
]}

Roy, Susanta Sinha ^{[1
]}

机构：

[1] Shiv Nadar Univ, Dept Phys, Sch Nat Sci, Greater Noida 201314, Uttar Pradesh, India

[2] Univ Ulster, Nanotechnol & Integrated Bioengn Ctr, Newtownabbey BT37 0QB, North Ireland

[3] SN Bose Natl Ctr Basic Sci, Dept Condensed Matter Phys & Mat Sci, Kolkata 700106, India

来源：

ACS APPLIED NANO MATERIALS | 2020年 / 3卷 / 05期

关键词：

red mud; arsenic; hematite; electrochemical detection; sensitivity; electron-transfer kinetics; BIMETALLIC NANOPARTICLES; TRACE ARSENIC(III); METAL-IONS; COMPOSITE; ELECTRODE; MICROSPHERES; PERFORMANCE; BEHAVIOR; REMOVAL; AS(III);

D O I：

10.1021/acsanm.0c00165

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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 mu A 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.

引用

页码：4084 / 4090

页数：7

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