Structure engineering of functional solid catalysts by unit-network methodology

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Structure engineering of functional solid catalysts has been conducted on the basis of unit-network methodology of molecular-type polyoxide units under hydrothermal condition for creating three-dimensional network structure of the units. The methods were applied to metal oxide components in 6, 5 and 4 element group and successfully gave various solids with nano-size structure with a heptagonal structural unit, confirming the applicability of the method for creating high-dimensional solid structures. This method was also found useful for creating a new three-dimensional zeolite-type porous solid based on molecular-type polyoxide units. The materials are totally new and showed unique adsorption property for CO2 and ethane. These obtained materials showed solid-acid property and incomparable catalytic property based on an asymmetric porous structure.