Title of article :
Preparation of mesoporous carbon by freeze drying Original Research Article
Author/Authors :
H. Tamon، نويسنده , , H. Ishizaka، نويسنده , , T. Yamamoto، نويسنده , , T. Suzuki، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 1999
Pages :
7
From page :
2049
To page :
2055
Abstract :
Resorcinol–formaldehyde (RF) cryogels were synthesized by sol-gel polycondensation of resorcinol with formaldehyde and freeze drying with t-butanol. The cryogels were characterized by nitrogen adsorption and density measurements. Their porous properties were compared with those of RF aerogels prepared by supercritical drying with carbon dioxide. RF cryogels were mesoporous materials with large mesopore volumes >0.58 cm3/g. Although surface areas and mesopore volumes of the cryogels were smaller than those of the aerogels, the cryogels were useful precursors of mesoporous carbons. Carbon cryogels were obtained by pyrolyzing RF cryogels in an inert atmosphere. Carbon cryogels were mesoporous materials with high surface areas >800 m2/g and large mesopore volumes >0.55 cm3/g. When pyrolyzed, micropores are formed inside the cryogels more easily than inside the aerogels.
Journal title :
Carbon
Serial Year :
1999
Journal title :
Carbon
Record number :
1118057
Link To Document :
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