PREPARATION OF POROUS GLASS-CERAMICS WITH A SKELETON OF NASICON-TYPE CRYSTAL CUTI2(PO4)(3)

A novel porous glass-ceramic with a skeleton of CuTi2(PO4)(3) was prep ared by controlled crystallization of a glass and subsequent chemical leaching of the resulting dense glass-ceramic, A volume-crgstallized d ense glass-ceramic composed of CuTi2(PO4)(3) and Cu-3(PO4)(2) whose su rface was covered by a CuO thin layer was prepared by reheating a glas s with a nominal composition of 50CuO . 20TiO(2) . 30P(2)O(5) (in mol% ) glass in air, When the resultant glass-ceramic was leached with dilu te H2SO4, Cu-3(PO4)(2) and CuO phases were dissolved out selectively, leaving a crystalline CuTi2(PO4)(3) skeleton, The specific surface are a and the average pore radius of the porous glass-ceramic obtained wer e approximately 45 m(2) . g(-1) and 9 nm, respectively, The porous gla ss-ceramic showed catalytic activity in the conversion reaction of pro pene into acrolein.