Issue 2, 1999

Manganese oxide porous crystals

Abstract

This article reviews the structure, synthesis, host-guest reaction in aqueous phase, and ion-sieve and molecular-sieve properties of porous manganese oxide crystals. Tunnel and layered manganese oxides constitute a large family of porous materials having pore size from ultramicropores to mesopores. The manganese oxide crystals consist of MnO 6 octahedral units shared by corners and/or edges. They can be prepared by using various metal ions or organic surfactants as templates. The templates are extracted/inserted topotactically from/into the tunnels or interlayer spaces of the manganese oxides by two different mechanisms: redox-type and ion-exchange-type. These manganese oxides show excellent ion-sieve and molecular-sieve properties for the adsorptions of cations or organic molecules. The adsorptive selectivities are dependent on their structures.

Article information

Article type
Paper

J. Mater. Chem., 1999,9, 319-333

Manganese oxide porous crystals

Q. Feng, H. Kanoh and K. Ooi, J. Mater. Chem., 1999, 9, 319 DOI: 10.1039/A805369C

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