Synthesis, characterization, and dye degradation efficiency of MgSb2O6as a visible-light-active semiconductor photocatalyst

Banan W. A., Alghaswyneh and Venkatesh, R. and Vijaylakshmi, D. (2025) Synthesis, characterization, and dye degradation efficiency of MgSb2O6as a visible-light-active semiconductor photocatalyst. Ceramics International, 51 (27). ISSN 02728842

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Abstract

A nanostructured MgSb2O6photocatalyst was synthesized via solution combustion and structurally characterized using X-ray diffraction, Scanning Electron Microscopy, Transmission Electron Microscopy, Raman, X-ray photoelectron, UV–Vis and photoluminescence (PL) spectroscopy. Rietveld refinement confirmed a dominant tetragonal MgSb2O6phase with minor MgSb2O4, reflecting mixed Sb5+/Sb3+oxidation states. The average crystallite size (∼51 nm) and microstrain (3.53 × 10−3) suggested fine nanocrystallinity. SEM and TEM revealed agglomerated, porous morphology with grain sizes ∼75 nm and crystallites between 20 and 50 nm. Raman spectra identified distinct Sb–O vibrational modes, while PL and Ultraviolet (UV) -Visible studies showed defect-related emissions and a ∼3.85 eV bandgap, indicating strong UV absorption. The photocatalytic activity was assessed for Methylene Blue (MB), Methyl Orange (MO), and Rhodamine B (RhB) dyes under sunlight. Degradation efficiencies reached 90 %, 85 %, and 77 % for MB, MO, and RhB, respectively, within 100 min, with degradation following pseudo-first-order kinetics. The photocatalytic performance was enhanced by alkaline/acidic pH and H2O2addition. The findings highlight the potential of MgSb2O6as an efficient, photocatalytic dye degradation in wastewater treatment. © 2025 Elsevier Ltd and Techna Group S.r.l. All rights are reserved, including those for text and data mining, AI training, and similar technologies.

Item Type:	Article
Uncontrolled Keywords:	MgSb2O6; Nanocatalyst; Organic pollutant; Photocatalysis; Wastewater
Subjects:	D Physical Science > Physics
Divisions:	Department of > Physics
Depositing User:	Vasantha library uom
Date Deposited:	29 Nov 2025 10:27
Last Modified:	29 Nov 2025 11:30
URI:	http://eprints.uni-mysore.ac.in/id/eprint/18103

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