Abstract
A wet impregnation technique was utilized to synthesize g-C3N4/CuS heterojunction. The crystalline structure, functional groups, morphology, elemental configuration, optical absorption characteristics, electron hole recombination and charge transfer property of the prepared materials were analyzed through Powder X-ray diffraction (PXRD), Fourier transform infrared spectroscopy (FTIR), High resolution scanning electron microscopy (HR-SEM), X-ray photoelectron spectroscopy (XPS), Diffused reflectance spectroscopy (UV–vis DRS), Photoluminescence (PL) and Electrochemical impedance spectroscopy (EIS) were investigated in detail. The specific surface area and pore volume of the prepared materials were characterized by N2 adsorption–desorption isotherms and BET analysis. Photocatalytic performance of tetracycline (TC) on direct sunlight radiance was assessed. Also, the calculated photocatalytic degradation effect of TC over binary photocatalyst was estimated as 91.7% at 60 min which is 4.28 and 3.89 times superior to g-C3N4 and CuS correspondingly. The \({h}^{+}\) and \({}^{ \cdot }O_{2}^{ - }\) radicals play a crucial role compared to \({}^{ \cdot }{\text{OH}}\) radical. The g-C3N4/CuS heterojunction performed as outstanding photocatalytic stability even after five cycles and has good chemical property. The formation of intermediate products during the degradation of TC was identified by GC–MS and conceivable degradation mechanism of tetracycline (TC) by g-C3N4/CuS heterojunction was also discussed. Finally, these results designated that the synthesized g-C3N4/CuS exhibits as a potential material for degradation of TC under sunlight irradiation.
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Acknowledgements
The author would like to acknowledge, Dr. V. Sivamurugan, Assistant Professor, PG and Research Department of Chemistry, Pachaiyappa’s College, Chennai and R. Mahalakshmi, Assistant Professor, PG and Research Department of Physics, Aalim Muhammed Salegh College of Engineering, Chennai for supporting this research work.
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Siddhardhan, E.V., Steephen, A. & Arumanayagam, T. Effective and highly sunlight response g-C3N4/CuS heterojunction photocatalyst for the degradation of tetracycline antibiotic. J Mater Sci: Mater Electron 34, 1225 (2023). https://doi.org/10.1007/s10854-023-10649-7
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DOI: https://doi.org/10.1007/s10854-023-10649-7