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《Journal of Functional Materials》 2006-12
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Synthesis and characterization of a novel bimodal silicon carbide

ZHENG Yong~1,ZHENG Ying~1,LIN Liang-xu~1,WEI Ke-mei~2(1.College of Chemistry and Materials Science,Fujian Normal University,Fuzhou 350007,China;2.National Engineering Research Center of Chemical Fertilizer Catalyst,Fuzhou University,Fuzhou 350002,China)  
The sol-gel method is proposed for the preparation of a binary carbonaceous silicon xerogel by using tetraethoxysilane(TEOS) and saccharose as the raw materials,which the excess carbon source is used as pore former.A new kind of bimodal mesoporous silicon carbide was synthesized via a carbothermal reduction reaction of carbonaceous silicon xerogel at 1500℃ in an argon flow.The purified SiC sample was characterized by XRD,SEM,TEM and N_2 porosimeter.The results show that the obtained SiC has the morphology of thorn sphere(TS).The TS SiC sample possesses a bimodal pore structure consisting of framework mesoporous of 2~6nm and textural mesoporous ranging over 6~40nm,which has a surface area of 113m~2/g and a pore volume of(0.38)m~3/g.
【Fund】: 国家自然科学基金资助项目(20576021);; 福建省教育厅资助项目(2005K015)
【CateGory Index】: O613.7
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