Manganese oxide anchored on carbon modified halloysite nanotubes: An electrochemical platform for the determination of chloramphenicol

• Published in: Colloids and surfaces. A, Physicochemical and engineering aspects Vol. 615; p. 126243
• Main Authors: Kesavan, Ganesh, Chen, Shen−Ming
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 20-04-2021
• Subjects: Carbon modification; Chloramphenicol; Electrocatalyst; Halloysite nanotubes; Manganese oxide; Sugar dehydration; Sugar dehydration; Chloramphenicol; Electrocatalyst; Carbon modification; Halloysite nanotubes; Manganese oxide
• ISSN: 0927-7757; 1873-4359
• DOI: 10.1016/j.colsurfa.2021.126243

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•Carbon modified halloysite nanotube (CCH) was achieved via glucose dehydration using sulphuric acid.•The Mn2O3@CCH composite was achieved using a two-step process.•CCH played an important role in enhancing the conductivity of pristine manganese oxide.•The modified electrode displayed a wide linear range and the lowest detection limit of 0.03 μM.
Halloysite, a naturally occurring aluminosilicate clay mineral similar to kaolinite, displays high surface area, high stability, and tunable surface chemistry. In this study, preparation, and the electrochemical behavior of manganese oxide (Mn2O3) supported on carbon modified halloysite nanotube (CCH) composite for the selective recognition of CAP was successfully described. The carbon modified halloysite nanotubes were achieved via a glucose dehydration process using sulphuric acid and the Mn2O3 particles were prepared using a wet chemical process. Over and above, the wet impregnation method was engaged to anchor Mn2O3 particles on the CCH matrix. The structural and morphological details of the as-prepared Mn2O3@CCH composite were studied in detail. The CCH attached to the clump of Mn2O3 particles (9.69 m2 g–1) revealed an increase in surface area than pristine Mn2O3 particles (0.41 m2 g–1) using Brunauer–Emmett–Teller analysis. The electron transfer ability and their electrochemical performance on Mn2O3@CCH composite were scrutinized using electrochemical impedance spectroscopy, cyclic voltammetry, and differential pulse voltammetry studies. Under optimized conditions, DPV analysis shown a wide linear range of 0.005–91.94 μM with a detection limit of 0.03 μM. As proof of concept, the real-time viability was verified in water samples with satisfactory recovery results. In terms of sustainability, HNT and HNT modified composites are highly beneficial and it has remarkable potential as a low-cost catalyst.