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<p>The aim of this study is to synthesize and characterize MgO nanoparticles for use as a catalyst in the photodegradation of textile dye (basic yellow 28: BY28). MgO-NPs were synthesized using Rosmarinus officinalis plant leaf extract and MgSO<sub>4</sub>.7H<sub>2</sub>O as precursor under the following conditions: temperature of 70&#xa0;°C, stirring speed of 300&#xa0;rpm and reaction time of 1.0&#xa0;h. Synthesized MgO-NPs were characterized by several techniques. The XRD pattern shows peaks corresponding to face-centered cubic (FCC) lattice structure, while Fourier transform infrared (FTIR) spectroscopy and EDX analysis confirm the presence of MgO and. BET analysis shows a specific surface area of 35.6 m<sup>2</sup>&#xa0;g<sup>−1</sup> and a pore diameter of 52&#xa0;nm, implying a mesoporous material. Finally, TGA analysis combined with DSC shows two mass losses and endothermic phenomena corresponding to the dehydration and decomposition of organic compounds. The photodegradation of basic yellow 28 (BY28) under UV irradiation, in the presence of synthesized nanoparticles, was studied by applying an experiment of design method, namely response surface methodology (RSM), which enabled to develop a regression model for determining optimal conditions. 100% degradation of BY28 was achieved within 40&#xa0;min. Tests on the reuse of MgO nanoparticles as photocatalysts showed that after five cycles, from statistical point of view, the 14% decrease in efficiency is not significant, with a 5% risk of being wrong. This discrepancy can be attributed to experimental error.</p>

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Synthesis and characterization of MgO nanoparticles obtained by a green method and its use for photodegradation of basic yellow 28 in aqueous solution

  • 期刊论文

  • 发表日期：

    2025年8月28日

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  • Mohamed Ait Oumeraci,
  • Tarek Berrama,
  • Hayet Tizi,
  • Feriel Sahoui,
  • Lamia Brahmi,
  • Aya Alterkaoui,
  • Nadir Dizge

摘要

The aim of this study is to synthesize and characterize MgO nanoparticles for use as a catalyst in the photodegradation of textile dye (basic yellow 28: BY28). MgO-NPs were synthesized using Rosmarinus officinalis plant leaf extract and MgSO4.7H2O as precursor under the following conditions: temperature of 70 °C, stirring speed of 300 rpm and reaction time of 1.0 h. Synthesized MgO-NPs were characterized by several techniques. The XRD pattern shows peaks corresponding to face-centered cubic (FCC) lattice structure, while Fourier transform infrared (FTIR) spectroscopy and EDX analysis confirm the presence of MgO and. BET analysis shows a specific surface area of 35.6 m2 g−1 and a pore diameter of 52 nm, implying a mesoporous material. Finally, TGA analysis combined with DSC shows two mass losses and endothermic phenomena corresponding to the dehydration and decomposition of organic compounds. The photodegradation of basic yellow 28 (BY28) under UV irradiation, in the presence of synthesized nanoparticles, was studied by applying an experiment of design method, namely response surface methodology (RSM), which enabled to develop a regression model for determining optimal conditions. 100% degradation of BY28 was achieved within 40 min. Tests on the reuse of MgO nanoparticles as photocatalysts showed that after five cycles, from statistical point of view, the 14% decrease in efficiency is not significant, with a 5% risk of being wrong. This discrepancy can be attributed to experimental error.