以间苯二酚-甲醛溶胶和MCM-48原粉制备有序介孔炭分子筛

Synthesis of Ordered Mesoporous Carbons Using Resorcinol-Formaldehyde Sol as the Carbon Source and As-synthesized MCM-48 as the Template

以含有机模板的介孔纯硅分子筛MCM-48原粉为模板,以间苯二酚（R）-甲醛溶胶为炭源制备了有序介孔炭分子筛.考察了w（R）/w（MCM-48）和w（R）/w（H2O）对合成介孔炭分子筛的影响.产物用N2吸附/脱附、XRD、SEM、TEM和TG等手段进行了表征.结果表明,w（R）/w（MCM-48）和w（R）/w（H2O）对所得到的介孔炭分子筛的有序性和比表面积有较大的影响.优化的w（R）/w（MCM-48）比为0.50～0.65、w（R）/w（H2O）比为0.15～0.35,此时,能形成比表面积大于1125m^2/g、平均孔径在2.2～2.4nm、具有规则介孔结构的炭分子筛,且这种炭分子筛具有高的热稳定性.

Ordered mesoporous carbons were synthesized by using as-synthesized MCM-48 as the template and resorcinol （R） -formaldehyde sol as the carbon precursor. By changing the molar ratio of resoreinol （R） to template （w（ R）/w（ MCM-48 ） ） and resoreinol （R） to water（ w （ R）/w （ H20） ）, mesoporous carbons with different porosities were produced. The obtained samples were characterized by N2 adsorption-desorption, X-ray diffraction, scanning electron microscopye, transmission electron microscopye and thermogravimetric analysis. It is found that the optimized w（ R）/w（MCM-48） and w（R）/w（ H2O） ratios are in the rang from 0.50 to 0.65 and from 0.15 to 0.35, respectively, and the resulting ordered mesoporous carbons has BET specific surface areas greater than 1125m^2/g, mean pore sizes from 2.2 to 2.4nm, and high thermal stability.