General Synthesis of Periodic Macroporous Solids by Templated Salt Precipitation and Chemical Conversion

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• 作者：Hongwei Yan ; Christopher F. Blanford ; Brian T. Holland ; William H. Smyrl ; and Andreas Stein
• 刊名：Chemistry of Materials
• 出版年：2000
• 出版时间：April 2000
• 年：2000
• 卷：12
• 期：4
• 页码：1134 - 1141
• 全文大小：657K
• 年卷期：v.12,no.4(April 2000)
• ISSN：1520-5002

文摘

This paper presents a general method to prepare three-dimensionally ordered macroporous(3DOM) metal oxides or carbonates via templating with polystyrene (PS) spheres. The methodis based on templated precipitation of metal salts (acetates, oxalates, oxides) within a colloidalcrystal of PS spheres and subsequent chemical conversion of the inorganic precursors. Thecompositional range of possible macroporous products includes oxides or carbonates of manymetals in the periodic table (e.g., MgO, Cr₂O₃, Mn₂O₃, Fe₂O₃, Co₃O₄, NiO, ZnO, CaCO₃),including compositions that are less accessible or more expensive by previous syntheses basedon metal alkoxide precursors. Optimal synthesis conditions and structural features of selectedmaterials are described, on the basis of XRD, TGA, SEM, TEM, nitrogen adsorption data,and chemical analysis.