title: 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.
authors.affiliation: College of Science, University of Shanghai for Science and Technology, Shanghai 200093, PR China.
authors.forename: Ying-Ying
authors.initials: YY
authors.lastname: Gu
authors.forename: Shu-Yuan
authors.initials: SY
authors.lastname: Yu
authors.forename: Ai-Guo
authors.initials: AG
authors.lastname: Kong
authors.forename: Chun-Yan
authors.initials: CY
authors.lastname: Hua
authors.forename: Han-Ming
authors.initials: HM
authors.lastname: Ding
authors.forename: Yong-Kui
authors.initials: YK
authors.lastname: Shan