Hybridization of Co3S4 and Graphitic Carbon Nitride Nanosheets for High-performance Nonenzymatic Sensing of H2O2

Ramesh, Asha and Ajith, Ajay and Gudipati, Neeraja Sinha and Vanjari, Siva Rama Krishna and John, S. Abraham and Biju, Vasudevanpillai and Ch, Subrahmanyam (2023) Hybridization of Co3S4 and Graphitic Carbon Nitride Nanosheets for High-performance Nonenzymatic Sensing of H2O2. Biosensors, 13 (1). ISSN 2079-6374

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Abstract

The development of efficient H2O2 sensors is crucial because of their multiple functions inside and outside the biological system and the adverse effects that a higher concentration can cause. This work reports a highly sensitive and selective non-enzymatic electrochemical H2O2 sensor achieved through the hybridization of Co3S4 and graphitic carbon nitride nanosheets (GCNNS). The Co3S4 is synthesized via a hydrothermal method, and the bulk g-C3N4 (b-GCN) is prepared by the thermal polycondensation of melamine. The as-prepared b-GCN is exfoliated into nanosheets using solvent exfoliation, and the composite with Co3S4 is formed during nanosheet formation. Compared to the performances of pure components, the hybrid structure demonstrates excellent electroreduction towards H2O2. We investigate the H2O2-sensing performance of the composite by cyclic voltammetry, differential pulse voltammetry, and amperometry. As an amperometric sensor, the Co3S4/GCNNS exhibits high sensitivity over a broad linear range from 10 nM to 1.5 mM H2O2 with a high detection limit of 70 nM and fast response of 3 s. The excellent electrocatalytic properties of the composite strengthen its potential application as a sensor to monitor H2O2 in real samples. The remarkable enhancement of the electrocatalytic activity of the composite for H2O2 reduction is attributed to the synergistic effect between Co3S4 and GCNNS.

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IITH Creators:

IITH Creators	ORCiD
Vanjari, Siva Rama Krishna	http://orcid.org/0000-0001-6753-2800
Ch, Subrahmanyam	https://orcid.org/0000-0002-2643-3854

Item Type:

Article

Uncontrolled Keywords:

amperometry; Co3S4; cyclic voltammetry; differential pulse voltammetry; electrochemical sensor; g-C3N4 nanosheets; H2O2 sensor; amperometry; Article; catalysis; chemical analysis; chemical bond; chemical reaction kinetics; cyclic voltammetry; differential pulse voltammetry; electrochemistry; hybridization; limit of detection; scanning electron microscopy; sensitivity analysis; synthesis; transmission electron microscopy; ultraviolet visible spectroscopy; X ray powder diffraction; Adverse effect; Amperometry; Differential pulse voltammetry; G-C3N4 nanosheet; Graphitic carbon nitrides; H2O2 sensor; Hybridisation; Multiple function; Non-enzymatic; Performance; cobalt derivative; cobalt oxide; graphitic carbon nitride nanosheet; hydrogen peroxide; nanosheet; unclassified drug; graphite; graphitic carbon nitride; hydrogen peroxide; nanomaterial; nitrogen derivative; Electrochemical sensors; Electrolytic reduction; Nanosheets; Graphite; Hydrogen Peroxide; Nanostructures; Nitrogen Compounds; Cyclic voltammetry

Subjects:

Electrical Engineering
Electrical Engineering > Instruments and Instrumentation
Chemistry
Chemistry > Techniques, procedures, apparatus, equipment, materials

Divisions:

Department of Chemistry
Department of Electrical Engineering

Depositing User:

Mr Nigam Prasad Bisoyi

Date Deposited:

16 Aug 2023 11:24

Last Modified:

16 Aug 2023 11:24

URI:

http://raiithold.iith.ac.in/id/eprint/11555