简易模板法制备有序介孔碳

通过一种简易的模板法制备了有序介孔碳,即硅/P123三嵌段共聚物复合物经硫酸处理后,再加入蔗糖碳源经碳化和除硅处理合成出有序介孔碳。该方法与传统硬模板相比,其合成工序简单,成本更低;与其他简化合成方法相比,避免了由碳源不足而造成的介孔碳有序性低的缺点。通过小角XRD、N2吸脱附和HRTEM对样品及其中间过程进行了表征。结果表明,自晶化过程后,样品在合成的各个时期均保持着有序的介孔结构,当蔗糖添加量为1.5g时合成出的介孔碳材料有序性最高,比表面积和孔容也最高,分别为1261m2·g-1,1.03cm3·g-1。

Simple Template Method for Synthesis of Ordered Mesoporous Carbon

Ordered mesoporous carbon materials were synthesized via a simple template method by adding sucrose to the sulfuric-acid-treated silica/P123 triblock copolymer composite and followed by carbonization and removal of the silica. This technique is simpler and the cost is lower than the conventional hard template method. Besides, compared to other simple way, this technique avoids the disadvantage of low ordered structure of the mesoporous carbon caused by deficiency of carbon source. The samples were investigated by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM) and nitrogen adsorption-desorption. The results show that the samples after crystallization maintain ordered mesoporous structure at various periods during the course of the synthesis. When the addition of sucrose is 1.5 g, the highest ordered mesoporous carbon is obtained with highest surface area of 1 261 m²·g^-1 and pore volume of 1.03 cm³·g^-1.