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Vol. 37 No. 12 (2025): Vol 37 Issue 12, 2025

Copyright (c) 2025 SARATHKUMAR ANBUSELVAN, NITHISHKUMAR SRINIVASAN, SIVAKUMAR GANESAN

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Solvothermal Synthesis of Flower-like CMTS Nanostructures for High-Efficiency Photocatalytic Degradation of Organic Dyes Under Natural Sunlight

https://doi.org/10.14233/ajchem.2025.34638
Sarathkumar Anbuselvan
Department of Physics, Annamalai University, Annamalai Nagar-608002, India
https://orcid.org/0009-0003-5307-2489
Nithishkumar Srinivasan
Department of Physics, Annamalai University, Annamalai Nagar-608002, India
https://orcid.org/0009-0006-1828-4429
Sivakumar Ganesan
Department of Physics, Annamalai University, Annamalai Nagar-608002, India
https://orcid.org/0009-0003-8407-1534

Corresponding Author(s) : Sivakumar Ganesan

gsk.csil@gmail.com

Asian Journal of Chemistry, Vol. 37 No. 12 (2025): Vol 37 Issue 12, 2025

Abstract

In this study, Cu2MnSnS4 (CMTS) nanoparticles with a flower-like nanostructure were successfully synthesized via a solvothermal method by varying the reaction durations to investigate their structural, morphological and photocatalytic properties. X-ray diffraction (XRD) and Raman spectroscopy confirmed the formation of a single-phase kesterite structure at prolonged reaction time (24 h), while shorter durations resulted in mixed phases. SEM analysis revealed the evolution of well-defined flower-like architectures composed of ultrathin nanosheets in the 24 h sample, which exhibited improved crystallinity and phase purity. XPS analysis confirmed the presence of Cu+, Mn2+, Sn4+ and S2– oxidation states. The optical characterization using UV-Vis diffuse reflectance spectroscopy revealed strong visible light absorption with a narrowed bandgap of 1.66 eV for the 24 h sample. The photocatalytic activity of CMTS nanoparticles was evaluated under natural sunlight for the degradation of methylene blue (MB) and crystal violet (CV) dyes. The Cu2MnSnS4-24 (CMTS24) catalyst demonstrated superior degradation efficiencies of 76% for MB and 73% for CV within 50 min, attributed to its high surface area, improved charge carrier separation and enhanced light-harvesting capability. These findings highlight the crucial role of reaction time in determining the structural and functional properties of CMTS nanomaterials, establishing CMTS24 as a promising candidate for solar-driven photocatalytic wastewater treatment applications.

Keywords

Copper manganese tin sulfide (CMTS) Solvothermal synthesis Nano-flower Photocatalytic activity
(1)
Anbuselvan, S.; Srinivasan, N.; Ganesan, S. Solvothermal Synthesis of Flower-Like CMTS Nanostructures for High-Efficiency Photocatalytic Degradation of Organic Dyes Under Natural Sunlight. ajc 2025, 37, 3011-3018.
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