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<p>Bis (8-hydroxyquinoline) manganese (Mnq<sub>2</sub>) material was prepared by the liquid-phase synthesis method. The material was characterized by SEM, FTIR, UV–vis, BET, and PL. The synthesized Mnq<sub>2</sub> was used as a photocatalyst, and methylene blue (MB) was used as the targeted contaminant to study the effect of the addition amount of Mnq<sub>2</sub> on the photocatalytic performance. The findings indicated that the reaction conformed to the Langmuir–Hinshelwood pseudo-first order kinetic model, with the degradation efficiency (D) and the reaction rate constant (k) displaying a consistent variation trend. When the addition amount of Mnq<sub>2</sub> was 40&#xa0;mg, the degradation effect on the 20&#xa0;mg/L methylene blue solution was the best. After 210&#xa0;min of degradation, D = 98.23%, and k = 0.02109&#xa0;min<sup>−1</sup>. After three cycles, the degradation rate still remained above 95%. Different addition amounts could achieve a degradation rate of over 95% after 210&#xa0;min of degradation. This suggests that Mnq<sub>2</sub> holds potential for the remediation of methylene blue-containing wastewater, exhibiting favorable photocatalytic activity and stability in the process.</p>

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Preparation of bis (8-hydroxyquinoline) manganese (Mnq2) and study on its photocatalytic degradation performance of methylene blue

  • 期刊论文

  • 发表日期：

    2025年9月23日

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  • Suorui Huang,
  • Penghui Ma,
  • Xin Huang,
  • Guiyi Huang,
  • Qingyuan Niu,
  • Feng Luo,
  • Liuchuang Wei,
  • Yumin Song,
  • Suihai Chen

摘要

Bis (8-hydroxyquinoline) manganese (Mnq2) material was prepared by the liquid-phase synthesis method. The material was characterized by SEM, FTIR, UV–vis, BET, and PL. The synthesized Mnq2 was used as a photocatalyst, and methylene blue (MB) was used as the targeted contaminant to study the effect of the addition amount of Mnq2 on the photocatalytic performance. The findings indicated that the reaction conformed to the Langmuir–Hinshelwood pseudo-first order kinetic model, with the degradation efficiency (D) and the reaction rate constant (k) displaying a consistent variation trend. When the addition amount of Mnq2 was 40 mg, the degradation effect on the 20 mg/L methylene blue solution was the best. After 210 min of degradation, D = 98.23%, and k = 0.02109 min−1. After three cycles, the degradation rate still remained above 95%. Different addition amounts could achieve a degradation rate of over 95% after 210 min of degradation. This suggests that Mnq2 holds potential for the remediation of methylene blue-containing wastewater, exhibiting favorable photocatalytic activity and stability in the process.