Abstract
This paper studies the synthesis of Zn1-xMnxO (x = 0.00, 0.03, 0.06) nanoparticles using the co-precipitation method. The structural, morphological and optical properties were characterized by XRD, FTIR, SEM, HR-TEM and UV–Visible DRS analysis. The structural analysis indicated a hexagonal shape with good crystallinity of the samples. The FTIR absorption peaks confirmed the formation of Zn–O bonding. The surface morphology and particle size were observed by SEM and HR-TEM analysis. The EDS spectra determined the presence of elements Zn, Mn, and O in the samples. The optical band-gap of Mn-doped nanoparticles decreased with increasing concentration from 3.27 eV to 3.09 eV. The photocatalytic activity has been observed with methylene blue (MB) dye under solar irradiation. The Zn0.94Mn0.06O (Mn = 0.06) nanoparticles photocatalyst has the highest degradation efficiency at 94.08% within 180 min. This result shows that the Mn-doped ZnO enhanced the performance of the photocatalytic activity. In electrochemical performance analysis, undoped and Mn-doped electrodes have been studied 10 mV/s to 100 mV/s scan rate. Mn-doped electrodes decrease the specific capacitance due to low surface area. However, all the undoped and Mn-doped electrodes possess reduction and oxidation peaks, which is considerable for suitable electrode materials for energy storage devices.
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Acknowledgements
Authors are thankful to the Centralized Instrumentation and Service Laboratory (CISL), Annamalai University, for providing their analytical instrument facilities and gratefully acknowledge support by RUSA 2.0 under the Ministry of Human Resource Development, Department of Higher Education, Government of India.
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YR: Conceptualization, Methodology, Formal analysis, Visualization, Compiled original draft, Writing, Editing, and Data analysis. SS: Supervision, Formal analysis, and Visualization.
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Sivakumar, S., Robinson, Y. Effect and design of Mn2+ doped ZnO nanostructures for photodegradation and energy storage devices. J. Korean Phys. Soc. 82, 1196–1210 (2023). https://doi.org/10.1007/s40042-023-00802-0
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DOI: https://doi.org/10.1007/s40042-023-00802-0