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Vol. 36 No. 2 (2024): Vol 36 Issue 2, 2024

Copyright (c) 2024 S. Chetana, Halligudru Guddappa , Sanjay Upadhyay , Naveen Chandra Joshi, Niraj Kumar, Priyvart Choudhary, Vikas N. Thakur

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This work is licensed under a Creative Commons Attribution 4.0 International License.

Photocatalytic and Oxygen Evolution Reaction (OER) of Novel Supercritical Fluid Synthesized Nanobiocomposite MoS2/Silk G

https://doi.org/10.14233/ajchem.2024.30910
S. Chetana
Department of Mechanical Engineering, ATME College of Engineering, Mysore Kanakapura-Bangalore Road, Mysore-570028, India
https://orcid.org/0000-0001-6060-2087
Halligudra Guddappa
Department of Chemistry, ATME College of Engineering, Mysore Kanakapura-Bangalore Road, Mysore-570028, India
https://orcid.org/0000-0003-2054-5465
Sanjay Upadhyay
Department of Physics, Rajadhani of College, University of Delhi, Delhi-110015, India
https://orcid.org/0000-0002-3164-7398
Naveen Chandra Joshi
Department of Physics, Rajadhani of College, University of Delhi, Delhi-110015, India
Niraj Kumar
Department of Physics, Rajadhani of College, University of Delhi, Delhi-110015, India
https://orcid.org/0000-0003-2872-648X
Priyvart Choudhary
Department of Biotechnology, School of Applied and Life Sciences, Uttaranchal University, Dehradun-248007, India
https://orcid.org/0000-0002-0047-6805
Vikas N. Thakur
Department of Electronics and Communication Engineering, Graphic Era Deemed to be University, Dehradun-248002, India
https://orcid.org/0000-0002-0021-272X

Corresponding Author(s) : S. Chetana

chetana.s.mech@gmail.com

Asian Journal of Chemistry, Vol. 36 No. 2 (2024): Vol 36 Issue 2, 2024

Abstract

The photocatalytic activity and oxygen evolution reaction (OER) of MoS2 and silk graphene (silk G) composite synthesized using supercritical fluids and chemical vapor deposition (CVD) methods were investigated for their potential application in photocatalysis.  This material was subjected to characterize by XRD, TEM, SEM and FTIR techniques to demonstrate that MoS2/silk G composite still  existed in the supercritical fluids methods obtained MoS2 & MoS2/silk G. The optical features of MoS2 was improved by introduction of  silk G, which inturn caused shift in band gap from 1.65 to 1.85 eV. Within visible region, creation of high electron-hole pairs is possible  by adequate band gap modifications. The fast movement of photo-induced charge carrier can be enhanced by silk G as they decrease  the recombination activity. Additionally, the MoS2/silk G shows high oxygen evolution reaction with low Tafel slope of 157.2 mV dec-1  and low overpotential of 603 mV at a current density of 10 mA cm-2. The present study signifies that with addition of silk G in the MoS2  host improved the photocatalytic activity by 13% and electrocatalytic activity by nearly 5% compared to bare MoS2 nanoparticles. 

Keywords

Oxygen evolution reaction Silk graphene Transmition electran microscope
Chetana, S., Guddappa , H., Upadhyay , S., Joshi, N. C., Niraj Kumar, Choudhary, P., & Thakur, V. N. (2024). Photocatalytic and Oxygen Evolution Reaction (OER) of Novel Supercritical Fluid Synthesized Nanobiocomposite MoS2/Silk G. Asian Journal of Chemistry, 36(2), 425–433. https://doi.org/10.14233/ajchem.2024.30910
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