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Volume 13
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10.3390/technologies13070301
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Article

Improving CMTS Physical Properties Through Potassium Doping for Enhanced Rhodamine B Degradation

by
Amira Bouali
1,
Olfa Kamoun
1,
Moez Hajji
1,
Ileana Nicoleta Popescu
2,3,*,
Ruxandra Vidu
3,4,* and
Najoua Turki Kamoun
1,3
1
LR99ES13 Laboratory of Condensed Matter Physics (LPMC), Faculty of Sciences of Tunis, Department of Physics, Tunis El Manar University, Tunis 2092, Tunisia
2
Faculty of Materials Engineering and Mechanics, Valahia University of Targoviste, 130004 Targoviste, Romania
3
American Romanian Academy of Arts and Sciences, Citrus Heights, CA 95616, USA
4
Faculty of Materials Science and Engineering, National University of Science and Technology, POLITEHNICA Bucharest, 060042 Bucharest, Romania
*
Authors to whom correspondence should be addressed.
Technologies 2025, 13(7), 301; https://doi.org/10.3390/technologies13070301
Submission received: 3 June 2025 / Revised: 3 July 2025 / Accepted: 9 July 2025 / Published: 12 July 2025
(This article belongs to the Special Issue Sustainable Water and Environmental Technologies of Global Relevance)
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Abstract

This study investigated the enhancement of Cu2MnSnS4 (CMTS) thin films’ photocatalytic properties through potassium (K) doping for rhodamine B degradation under visible light. K-doped CMTS films synthesized using spray pyrolysis technology achieved a 98% degradation efficiency within 120 min. The physical property improvements were quantitatively validated through X-ray diffraction (XRD) analysis, which confirmed enhanced crystallinity. Scanning electron microscopy (SEM) revealed significant modifications in surface morphology as a function of potassium content, highlighting its influence on film growth dynamics. Optical characterization demonstrated a pronounced reduction in transmittance, approaching negligible values at 7.5% potassium doping, and a narrowed optical band gap of 1.41 eV, suggesting superior light absorption capabilities. Photocatalytic performance was significantly enhanced, achieving a Rhodamine B degradation efficiency of up to 98% at 7.5% doping. These enhancements collectively improved the material’s light-harvesting capabilities and charge separation efficiency, positioning K-doped CMTS as a highly effective photocatalyst compared to other ternary and quaternary materials.
Keywords: Cu2MgSnS4; spray pyrolysis technology; CMTS thin films; electronic materials; potassium doping; photocatalysis; physical properties Cu2MgSnS4; spray pyrolysis technology; CMTS thin films; electronic materials; potassium doping; photocatalysis; physical properties

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MDPI and ACS Style

Bouali, A.; Kamoun, O.; Hajji, M.; Popescu, I.N.; Vidu, R.; Turki Kamoun, N. Improving CMTS Physical Properties Through Potassium Doping for Enhanced Rhodamine B Degradation. Technologies 2025, 13, 301. https://doi.org/10.3390/technologies13070301

AMA Style

Bouali A, Kamoun O, Hajji M, Popescu IN, Vidu R, Turki Kamoun N. Improving CMTS Physical Properties Through Potassium Doping for Enhanced Rhodamine B Degradation. Technologies. 2025; 13(7):301. https://doi.org/10.3390/technologies13070301

Chicago/Turabian Style

Bouali, Amira, Olfa Kamoun, Moez Hajji, Ileana Nicoleta Popescu, Ruxandra Vidu, and Najoua Turki Kamoun. 2025. "Improving CMTS Physical Properties Through Potassium Doping for Enhanced Rhodamine B Degradation" Technologies 13, no. 7: 301. https://doi.org/10.3390/technologies13070301

APA Style

Bouali, A., Kamoun, O., Hajji, M., Popescu, I. N., Vidu, R., & Turki Kamoun, N. (2025). Improving CMTS Physical Properties Through Potassium Doping for Enhanced Rhodamine B Degradation. Technologies, 13(7), 301. https://doi.org/10.3390/technologies13070301

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