以硅凝胶网络结构为模板制备多孔炭材料的研究

STUDY ON SYNTHESIS OF POROUS CARBON USING SILICA GEL NETWORK AS A TEMPLATE

分别以蔗糖和正硅酸乙酯(TEOS)作为炭和硅凝胶的前驱体,通过溶胶凝胶过程形成蔗糖聚合物和硅凝胶的复合物,经高温炭化后将硅模板刻蚀去除制备了一种多孔炭材料。研究发现,影响多孔炭孔结构的主要因素是原料的摩尔比,另外还与胶凝温度、炭化温度、刻蚀方式有关。

A composite of sucrose copolymer and silica gel networks was generated by the sol - gel process using sucrose as carbon precursor and TEOS as silica precursor. After carbonizing , the silica template in the composite was etched away, then the porous carbons were obtained. We found that the mole ratio of the raw materials, gelling temperature, carbonization temperature and etching method could effect the pore structure of the porous carbons.