Facile Preparation of Three-Dimensionally Ordered Macroporous Alumina, Iron Oxide, Chromium Oxide, Manganese Oxide, and Their Mixed-Metal Oxides with High Porosity
By M. Sadakane, T. Horiuchi, Nobuyasu Kato, Chigusa Takahashi, W. Ueda. 2007
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This paper describes a facile method to produce three-dimensionally ordered macroporous (3DOM) alumina, iron oxide, manganese oxide, chromium oxide, and their mixed-metal oxides. An ethylene glycol (EG)−methanol mixed solution of metal nitrates was infiltrated into the void of the colloidal crystal template of a monodispersed poly(methyl methacrylate) (PMMA) sphere. Heating initiated nitrate oxidation of the EG to produce metal glyoxylate salt. Further heating converted the glyoxylate salt to metal oxide and decomposed PMMA which produced the desired 3DOM metal oxides. Two important parameters of this method are clarified in order to produce a well-ordered 3DOM structure in high yield: (1) The nitrate oxidation temperature should be lower than the glass transition temperature of the PMMA. (2) The heat produced by oxidative decomposition of the PMMA should effectively be removed. Furthermore, high porosity (66−81%) of the 3DOM materials was confirmed by Hg porosimetry, which can permit facile transport of...
Subfields: Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/e56b54bc778939ecd53e0a31a0e4df4dbfe50880
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In Materials Chemistry
Citations in the corpus
- Hierarchically structured porous materials: synthesis strategies and applications in energy storage (2020, background): “The surfactant templatingmethod has the advantage of controllable pore size and adjustable pore shape; it can synthesize a variety of hierarchically structured porous materials, including silicon dioxides,metals andmetal oxides [48].”