Chem. J. Chinese Universities ›› 2002, Vol. 23 ›› Issue (3): 478.

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Synthesis and Oxidative Catalysis of Microporous Heteropolyoxometalates CsxH5-xPW10V2O40SiO2

PENG Ge1, HU Chang-Wen1, WANG Yong-Hui1, CHEN Li-Dong1, WANG En-Bo1, FENG Shou-Hua2, LIU Yan-Yong3   

  1. 1. Institute of Polyoxometalate Chemistry, College of Chemistry, Northeast Normal University, Changchun 130024, China;
    2. State Key Laboratory of Inorganic Synthesisand Preparative Chemistry, Jilin University, Changchun 130023, China;
    3. Chemical Technology Division, Institute of Research and Innovation, Takada 1201, Kashiwa, Chiba 277, Japan
  • Received:2001-03-01 Online:2002-03-24 Published:2002-03-24

Abstract: Microporous heteropolyoxometalates CsxH5-xPW10V2O40SiO2 were synthesized by a solgel technique and characterized by IR, UV-Vis, BETadsorption/desorption isotherm. The structural frameworks of CsxH5-xPW10V2O40 are preserved within the silica networks. CsxH5-xPW10V2O40SiO2 are a kind of polyoxometalatesilica gel hybrids with uniform micropores of ca. 0.65 nm. They show a high catalytic activity for oxidation reaction of benzyl alcohol by H2O2(30) in liquid-solid systems and product selectivity for benzaldehyde(>96). The highest activity is observed at x=2.5 in CsxH5-xPW10V2O40SiO2 and little formation of benzoic acid and a more deeply oxidized product is observed.

Key words: Microporous heterpolyoxometalates, Synthesis, Structural characterization, Benzylalcohol, Oxidative catalysis, Benzyl aldehyde

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