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Vol. 37 No. 3 (2025): Vol 37 Issue 3, 2025

Copyright (c) 2025 Kamalakkannan J

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Effective, Reusable Applications of Nanostructured Silver-MnO2 for Dye Degradation under UV Light and Dye-Sensitized Solar Cells

https://doi.org/10.14233/ajchem.2025.33255
S. Chinnadhurai
PG & Research Department of Chemistry, Sri Vinayaga College of Arts and Science (Affiliated College of Thiruvalluvar University), Ulundurpet-606107, India
https://orcid.org/0009-0003-3099-7876
M. Arockia Doss
Department of Chemistry, St. Joseph University, Nagaland-797115, India
J. Kamalakkannan
PG & Research Department of Chemistry, Sri Vinayaga College of Arts and Science (Affiliated College of Thiruvalluvar University), Ulundurpet-606107, India
https://orcid.org/0000-0001-5271-7044

Corresponding Author(s) : J. Kamalakkannan

dr.jkamalakkannan@gmail.com

Asian Journal of Chemistry, Vol. 37 No. 3 (2025): Vol 37 Issue 3, 2025

Abstract

Silver-MnO2, a metal-doped semiconductor oxide, was synthesized using a simple precipitation technique and characterized with XRD, FESEM, HR-SEM, TEM, EDS, UV-Vis DRS and PL spectroscopy. The XRD and EDS results confirmed that MnO2 and metallic silver (Ag) are present in the catalyst, whereas FESEM images revealed a blend of nanoparticles with many cavities and hexagonal nanosheets. The HR-SEM and TEM analyses indicated that MnO2 particles have a pentagonal or hexagonal shape with silver clusters on their smooth surfaces. Interestingly, Ag-MnO2 absorbed more light in both the UV and visible areas compared to pure MnO2. The photocatalytic performance of Ag-MnO2 was evaluated by breaking down Evans blue (EB) dye under UV light, it clearly outperformed single-component MnO2 and two-component systems. The enhanced performance is attributed due to the effects of silver doping, which appear to facilitate improved charge separation and transfer within the catalyst. Additionally, Ag-MnO2 demonstrated a high degree of stability and can be reused easily. Over the course of four cycles, the catalytic capacity with a minimal reduction is sustained. Moreover, this material was more hydrophobic than MnO2, which could help with self-cleaning uses.

Keywords

Precipitation method Photocatalysis Antibacterial activity Evans blue dye Dye-sensitized solar cell
Chinnadhurai, S., Doss, M. A., & Kamalakkannan, J. (2025). Effective, Reusable Applications of Nanostructured Silver-MnO2 for Dye Degradation under UV Light and Dye-Sensitized Solar Cells. Asian Journal of Chemistry, 37(3), 707–714. https://doi.org/10.14233/ajchem.2025.33255
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