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<p>In this study, photocatalytic oxidation was applied to remove methyl orange (MO) dye from an aqueous solution. The effects of various parameters, including material concentration, H<sub>2</sub>O<sub>2</sub> concentration, pH value and the initial dye concentration were investigated. A novel manganese nitroprusside (MnNP) catalyst was synthesized using the precipitation method and characterized through XRD, SEM, RDs, Raman, FTIR and BET techniques. The MnNP exhibiting an orthorhombic structure has a band gap energy of 2.54&#xa0;eV and a surface area of 8.9 m<sup>2</sup>g<sup>−1</sup>. The results revealed that the removal of MO elimination increased with higher concentrations of H<sub>2</sub>O<sub>2</sub> and greater catalyst doses. The optimum conditions determined at room temperature were as follows: dye concentration of 10&#xa0;mg/L, MnNP concentration of 0.5&#xa0;g L⁻<sup>1</sup>, H<sub>2</sub>O<sub>2</sub> concentration of 0.238&#xa0;mM, and pH of 2 achieving a removal efficiency of 100% after 20&#xa0;min of reaction. The results indicate that MnNP is a highly effective visible-light-driven photocatalyst for the degradation of MO under sunlight irradiation.</p> Graphical Abstract <p></p>

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Efficient photocatalytic degradation of methyl orange using a novel manganese nitroprusside (MnNP) photocatalyst

  • 期刊论文

  • 发表日期：

    2025年7月10日

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  • Abdelkrim Djebli,
  • Hacene Bendjeffal,
  • Abdul Halim Bin Abdullah,
  • Toufek Metidji,
  • Hamida Bekakria,
  • Hadjer Mamine,
  • Yacine Bouhedja,
  • Amel Boudjemaa

摘要

In this study, photocatalytic oxidation was applied to remove methyl orange (MO) dye from an aqueous solution. The effects of various parameters, including material concentration, H2O2 concentration, pH value and the initial dye concentration were investigated. A novel manganese nitroprusside (MnNP) catalyst was synthesized using the precipitation method and characterized through XRD, SEM, RDs, Raman, FTIR and BET techniques. The MnNP exhibiting an orthorhombic structure has a band gap energy of 2.54 eV and a surface area of 8.9 m2g−1. The results revealed that the removal of MO elimination increased with higher concentrations of H2O2 and greater catalyst doses. The optimum conditions determined at room temperature were as follows: dye concentration of 10 mg/L, MnNP concentration of 0.5 g L⁻1, H2O2 concentration of 0.238 mM, and pH of 2 achieving a removal efficiency of 100% after 20 min of reaction. The results indicate that MnNP is a highly effective visible-light-driven photocatalyst for the degradation of MO under sunlight irradiation.

Graphical Abstract