SOL–GEL SYNTHESIS AND CHARACTERIZATION OF Sr-DOPED MgMn2O4 WITH PHOTOCATALYTIC PERFORMANCES

Henni Meriem, Kadi Samir and Benhebal Hadj
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Henni Meriem: Department of Chemistry, University of Tiaret, Tiaret 14000, Algeria
Kadi Samir: ��Laboratory of Plant Physiology Appliedto Above-Soil Culture, Department of Nature and Life Sciences, University of Tiaret, Tiaret 14000, Algeria
Benhebal Hadj: Department of Chemistry, University of Tiaret, Tiaret 14000, Algeria

Surface Review and Letters (SRL), 2022, vol. 29, issue 04, 1-8

Abstract: Pure and strontium (Sr)-doped magnesium manganite MgMn2O4 nanopowders were synthesized via sol–gel method. The powders were characterized by X-ray diffraction (XRD), Fourier transformer infrared (FT-IR), diffuse reflectance spectroscopy (DRS), scanning electron microscope (SEM) and energy dispersive X-ray (EDX). Photocatalytic activities were evaluated by methyl green degradation as the model molecule in aqueous media under visible radiation. The XRD results confirm the formation of the spinel phase for the MgMn2O4 nanoparticles, with crystallite sizes in the 14.10–13.20nm range. The formation of the spinel structure was also consolidated by infrared spectroscopy through the appearance of the characteristic bands of Mn–O and Mg–O located at 632 and 470cm−1, respectively. The SEM analysis showed that compact agglomerates were observed in all the samples. The results of the photocatalytic activity of the nanophotocatalysts clearly show an improvement in this activity following the incorporation of strontium, particularly with the 7% doped sample, with ∼ 96% degradation efficiency.

Keywords: MgMn2O4; Sr-doping; sol–gel; photocatalysis; methyl green (search for similar items in EconPapers)
Date: 2022
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DOI: 10.1142/S0218625X22500482

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