| 摘要 |
PROBLEM TO BE SOLVED: To further form a layer of microporous structure comprising fine silica particles or the like in the large pores of a large pore diameter silica gel without clogging the large pores, and thereby, to develop functions as an adsorption layer or a separation layer for a substance in a process liquid or as a carrier layer, reaction points or the like for a photocatalyst or the like by the microporous structure so as to further enhance the functions of the large pore silica gel. SOLUTION: The silica gel having a double pore structure having a microporous structure within the silica gel formed by depositing fine particles to 5 to 100 nm thickness is obtained by carrying out steps of: preparing large pore diameter silica gel original having a pore diameter of 50 to 3,500 nm; treating the large pore diameter silica gel with slurry or a sol liquid containing fine particles having a particle diameter of 1 to 50 nm so as to inject at least the slurry or the sol liquid containing the fine particles into the large pores of the large pore diameter silica gel; and drying the treated silica gel to adhere the fine particles to the inner walls of the large pores. COPYRIGHT: (C)2010,JPO&INPIT
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