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      https://www.ias.ac.in/article/fulltext/boms/045/0035

    • Keywords

       

      ${\alpha}$-MnO$_2$ nanorod; catalyst; degradation; rhodamine B.

    • Abstract

       

      Manganese dioxide (${\alpha}$-MnO$_2$) nanorods with diameters of about 5–15 nm and lengths of 100–150 nm were synthesized by a simple co-precipitation method, and the degradation mechanism of rhodamine B (RhB) at different pH levels was investigated. The ${\alpha}$-MnO$_2$ nanorods exhibited a high efficiency and rapid removal rate of RhB, which reached about 97.5% within 10 min when pH = 4 (and pH = 6.6) and 97.7% within 50 min when pH = 9 in the presence of H$_2$O$_2$. The results also indicated that a lower pH value is conducive to the blue shift of the characteristic peak of RhB dye and the attenuation of the characteristic peak intensity, which is mainly attributed to the combined effect of oxidative degradation and adsorption decolourization when pH is less than 9. Moreover, the ${\alpha}$-MnO$_2$ nanorod exhibits an excellent recyclability and catalytic stability. This research indicates that a-MnO2 nanorods have a potential application in practical dye pollutant treatment.

    • Author Affiliations

       

      SHUMIN WANG1 AO GUAN1 JIAHAN WANG1 XIAOFANG FU1 XIANG GUO1 YUAN TIAN2 KAIXUAN WANG2 WENPING CAO2 CUIMEI ZHAO3

      1. College of Light Industry, Liaoning University, Shenyang 110036, People’s Republic of China
      2. College of Chemistry, Liaoning University, Shenyang 110036, People’s Republic of China
      3. Key Laboratory of Preparation and Applications of Environmental Friendly Materials, Ministry of Education, Jilin Normal University, Changchun 130103, People’s Republic of China
    • Dates

       
  • Bulletin of Materials Science | News

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