以蔗糖和硅酸钠分别作为碳、硅凝胶的前驱体, 经溶胶-凝胶反应形成硅凝胶和蔗糖聚合物的混合网络结构, 高温炭化后将二氧化硅刻蚀去除, 制备了一种以中孔径为主的多孔碳材料, 其孔径可以通过反应条件的改变控制在8~25nm范围内, 经过扫描电子显微镜的观察以及低温氮气吸附等温线分析发现, 在蔗糖/硅摩尔比为0.33、溶胶pH值为3、凝胶温度为80℃、炭化温度为850℃时, 所制得的中孔碳BET表面积为597.63 m2/g、孔容及中孔率好, 对鼠李糖脂有良好的吸附性.
We used sucrose as carbon precursor and sodium silicate as silica precursor, and then generated a silica gel network and sucrose copolymer by the process of heat treatment. After carbonizing and etching the silica template, mesoporous carbons were obtained, whose pore sizes were 8-25nm. The obtained porous carbons were characterized by scanning electron microscope observation and nitrogen adsorption/desorption isotherms, we found that when the sucrose/ silica mol ratio was 0.33, pH ratio of the sol solution was 3, gelling tempreture was 80℃ and carbonization temperature was 850℃, the porous carbon prepared had BET surface area of 597.63m2/g, good pore volume, and mesoporosity, and had fine adsorption properties to rhamnolipid.
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