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<p>Mesoporous silica with hierarchical macroporous architecture (MMS) was prepared by applying templating synthesis techniques and used as an advanced support of manganese-oxide catalysts. Two types of pores, i.e., mesopores and macropores, were constructed by using organic surfactant and colloidal crystal of spherical poly(methyl methacrylate) (PMMA) particles as templates, respectively. Structural stability of MMS and formation of manganese oxides on MMS were confirmed through the various characterization techniques after loading of precursor on MMS and calcination in the air. Efficient adsorption performance of rhodamine B (RhB) in water was also observed in MMS having two types of pores, which was superior to that on porous silica with only one type of pores, either mesopores or macropores. Based on the functions of advantageous structure of MMS, manganese oxides supported on MMS showed good catalytic performance in the oxidative degradation of RhB in water by using ammonium peroxodisulfate. The combined porous structure of MMS has potential in the design of composite catalyst for water purification.</p>

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Efficient adsorptive removal and catalytic degradation of rhodamine B in water over manganese oxide supported on hierarchical macro-mesoporous silica

  • 期刊论文

  • 发表日期：

    2025年11月10日

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  • Takashi Kamegawa,
  • Kosei Ashitani,
  • Masato Tanaka,
  • Masaya Matsuoka

摘要

Mesoporous silica with hierarchical macroporous architecture (MMS) was prepared by applying templating synthesis techniques and used as an advanced support of manganese-oxide catalysts. Two types of pores, i.e., mesopores and macropores, were constructed by using organic surfactant and colloidal crystal of spherical poly(methyl methacrylate) (PMMA) particles as templates, respectively. Structural stability of MMS and formation of manganese oxides on MMS were confirmed through the various characterization techniques after loading of precursor on MMS and calcination in the air. Efficient adsorption performance of rhodamine B (RhB) in water was also observed in MMS having two types of pores, which was superior to that on porous silica with only one type of pores, either mesopores or macropores. Based on the functions of advantageous structure of MMS, manganese oxides supported on MMS showed good catalytic performance in the oxidative degradation of RhB in water by using ammonium peroxodisulfate. The combined porous structure of MMS has potential in the design of composite catalyst for water purification.