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A Comparative Study of the Structural and Optical Properties of Sol-gel Synthesized MgO Nanoparticles for Possible Applications

Year: 2025

Type: article

Abstract: This study presents the sol-gel synthesis of MgO using Mg(NO3)2.6H2O and MgCl2.H2O precursors. The as-synthesized MgO from both precursors were annealed at 800℃ for 2 hours to improve their quality. The annealed samples were analyzed employing X-ray diffraction (XRD) and ultraviolet-visible (UV-VIS) spectrophotometry to evaluate how precursor type affects the structural and optical properties of MgO nanoparticles. XRD investigation indicated a polycrystalline cubic structure of MgO nanoparticles from both precursors, with preferred orientation in the (210) plane for the chloride-derived sample and in the (200) plane for the nitrate-derived sample. The estimated average crystallite size of MgO from the chloride is approximately twice that from the nitrate, with specific values of ~15 nm and ~7 nm respectively. UV-VIS diffuse reflectance spectrophotometry revealed that the band gap energies of the MgO from both salts were similar, with specific values of 5.69 eV and 5.75 eV for the nitrate-derived sample and the chloride-derived sample, respectively.

Source: Journal of Nano and Materials Science Research

Authors: Duru, Obinna M., Echendu, Obi Kingsley, Eze, F. C., Madu, C. A., Echewodo, J. C., Motloung, S. J., Yimamu, A. U.

Institutions: Federal University of Technology Owerri, University of the Free State

Language: English

Topic: Magnesium Oxide Properties and Applications

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: diamond

OpenAlex ID: W7220102268

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Cites: 9

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Related to: 10