Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Microwave Synthesis of Titanium Silicalite-1 Using Solid Phase Precursors

  • Kim, K.Y. (School of Chemical Science and Engineering, Inha University) ;
  • Ahn, W.S. (School of Chemical Science and Engineering, Inha University) ;
  • Park, D.W. (School of Chemical Science and Engineering, Inha University) ;
  • Oh, J.H. (School of Material Science and Engineering, Inha University) ;
  • Lee, C.M. (School of Material Science and Engineering, Inha University) ;
  • Tai, W.P. (School of Material Science and Engineering, Inha University)
  • Published : 2004.05.20
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Abstract

Titanium silicalite-1 (TS-1) molecular sieve was produced by microwave heating of amorphous titanium-containing solid precursors after impregnation with aqueous TPAOH solution. $SiO_2-TiO_2$ xerogel, sub-micron sized $SiO_2-TiO_2$ prepared by thermal plasma process, and Ti-containing mesoporous silica, Ti-HMS, were tested as the solid phase substrates. Highly crystalline product was obtained within 30 min. after microwave irradiation with yields over 90% using $SiO_2-TiO_2$ xerogel, which showed essentially identical physicochemical properties to TS-1 prepared by conventional hydrothermal method. Excellent catalytic activity was also obtained for 1-hexene epoxidation using $H_2O_2.\;SiO_2-TiO_2$ particles prepared by thermal plasma and Ti-HMS were found inferior as a substrate for TS-1, probably due to difficulties in wetting the surface uniformly with TPAOH.

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