General synthesis of periodic macroporous solids by templated salt precipitation and chemical conversion
This paper presents a general method to prepare three-dimensionally ordered macroporous (3DOM) metal oxides or carbonates via templating with polystyrene (PS) spheres. The method is based on templated precipitation of metal salts (acetates, oxalates, oxides) within a colloidal crystal of PS spheres and subsequent chemical conversion of the inorganic precursors. The compositional range of possible macroporous products includes oxides or carbonates of many metals in the periodic table (e.g., MgO, Cr{sub 2}O{sub 3}, Mn{sub 2}O{sub 3}, Mn{sub 2}O{sub 3}, Fe{sub 2}O{sub 3}, Co{sub 3}O{sub 4}, NiO, ZnO, CaCO{sub 3}), including compositions that are less accessible or more expensive by previous syntheses based on metal alkoxide precursors. Optimal synthesis conditions and structural features of selected materials are described, on the basis of XRD, TGA, SEM, TEM, nitrogen adsorption data, and chemical analysis.
- Research Organization:
- Univ. of Minnesota, Minneapolis, MN (US)
- Sponsoring Organization:
- National Science Foundation (NSF); USDOE
- DOE Contract Number:
- FG02-93ER14384
- OSTI ID:
- 20075563
- Journal Information:
- Chemistry of Materials, Vol. 12, Issue 4; Other Information: PBD: Apr 2000; ISSN 0897-4756
- Country of Publication:
- United States
- Language:
- English
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