Construction of Highly Pure Nanocrystalline Heteropoly Acid Inside the Channels of Mesoporous Material with the Imprisoned Hydrolyzation Reaction of Heteropoly Acid Etherate
Abstract:A novel technique was developed to prepare highly pure heteropoly acid (HPA) nanocrystals inside mesoporous SBA-15 by the imprisoned reaction of HPA etherate and water, which was utilized as a main driving force for the transportation of building-blocks. The transmission electron microscopy, X-ray diffraction, FT-IR spectrum and NMR characterizations unambiguously demonstrate that this method allows the highly pure heteropoly acid nanocrystals with intact Keggin-type structure controlled directionally self-assembly within mesopores of silica SBA-15. Such method may open up a new entry to the highly pure multicomponent nanocrystalline particles inside the cavity of the porous materials.
Document Type: Research Article
Publication date: June 1, 2008
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