利用线性酚醛树脂制备有序介孔碳

三嵌段共聚物F127为模板剂,线性酚醛树脂为碳前驱体,采用溶剂挥发诱导有机-有机自组装法(EI-SA)制备了具有二维六方结构的有序介孔碳。利用FT-IR、XRD、TEM、N2吸附/脱附等方法对有序介孔碳的结构进行了表征,研究了不同焙烧温度和模板剂用量对有序介孔碳结构的影响。结果表明,当模板剂的用量一定时,有序介孔碳的孔径、孔容和孔壁厚度都随着焙烧温度的升高而降低,但比表面积却随着微孔含量的增加而增大。随着模板剂用量的增加,介孔碳的有序性降低。有序介孔碳PF-2-500的比表面积、孔径、孔容、孔壁厚度和微孔比表面积比分别为583.82m2/g、3.05nm、0.31cm3/g、3.40nm和361.18m2/g,而有序介孔碳PF-1-500的比表面积、孔径和孔容相对于PF-2-500有所提高,分别为647.79m2/g、3.44nm和0.41cm3/g,但微孔比表面积和孔壁厚度分别降低为309.46m2/g和3.35nm。

Preparation of Ordered Mesoporous Carbon Using Novalac Phenolic Resin

Ordered mesoporous carbon framework with two-dimensional hexagonal had been synthesized through solvent evaporation induced organic-organic self-assembly method(EISA),by using triblock copolymer F127 as template and novalac phenolic resin as carbon precursor.The structure of ordered mesoporous carbon was characterized by FT-IR,X-ray diffraction,transmission electron microscopy and N2 adsorption/desorption measurements.The effect of different calcination temperature and template content on the pore structure of ordered mesoporous carbon was investigated.The results showed that with a certain content of template,the pore size,pore volume and wall thickness of ordered mesoporous carbon decreased with the calcination temperature increasing,but the special surface area increased due to increase of microporous surface area.The regularity of mesoporous carbon decreased with the content of the template increasing.The specific surface area,pore size,pore volume,pore wall thickness and microporous surface area of PF-2-500 were 583.82m2/g,3.05nm,0.31cm3/g,3.40nm and 361.18m2/g,respectively,compared with PF-2-500,the specific surface area,pore size and pore volume of PF-1-500 increased and the values were 647.79m2/g,3.44nm,0.41cm3/g,respectively,but the microporous surface area and pore wall thickness decreased to 309.46m2/g and 3.35nm.