METHOD FOR MANUFACTURING POROUS SILICA-CONTAINING PARTICLE, POROUS SILICA, AND POROUS SILICA CONTAINING PARTICLE

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing satisfactory porous-silica containing particles.SOLUTION: The method for manufacturing satisfactory porous silica-containing particles includes: a process (a) of preparing porous silica; a process (b) of bringing the porous silica into contact with liquid containing a metal or a compound having the metal as an elemental composition, and impregnating the holes of the porous silica with the liquid; and a process (c) of carrying out heat treatment after the process (b), and forming fine particles having the metal or the metal compound in the holes of the porous silica. Also, the porous silica is synthesized by hydrolyzing alkoxysilane with a nonsolvent system so that it is possible to synthesize the porous silica having fine pore diameters. The porous silica is used as a template so that it is possible to easily form even particles (for example, W, Cu, Cr, Mn, Fe, Co or Ni or their metal oxides) showing unprecedented specific quality in the state of bulk.