摘要
以P123嵌段共聚物表面活性剂为模板剂,在不同晶化温度下合成了不同孔径和比表面积的六方相介孔氧化硅SBA-15,通过XRD,SEM,N2吸附-脱附及TEM等手段系统考察了不同晶化温度对SBA-15晶胞参数、比表面积、孔径及形貌的影响,得到反应最佳晶化温度为120℃.随着晶化温度的升高,SBA-15的孔径增大,比表面积下降,团聚体颗粒打开形成散落短棒状.同时还对温度影响SBA-15结构和形貌的机理进行了探讨.
Highly ordered hexagonal mesoporous SBA-15 with different pore sizes and BET surface areas was prepared under different crystallization temperatures, using nonionic triblock P 123 as template. By means of XRD, SEM, N2 adsorption-desorption and TEM, the effects of crystallization temperature on morphology, surface area and pore size of SBA-15 were investigated. The results indicate that the best crystallization temperature is about 120℃. With increasing of crystallization temperature, the pore size of SBA-15 is increased and BET surface area decreased. When the crystallization temperature is 140℃ or higher, SEM images reveal that the morphology of SBA-15 is changed from ＂wheat-like＂ agglomerate particles to ＂banana-like＂ short rods. These results are discussed further in terms of the synthesis mechanism of SBA-15 and structure characteristics of P123 surfactant.
出处
《过程工程学报》
EI
CAS
CSCD
北大核心
2006年第3期499-502,共4页
The Chinese Journal of Process Engineering
基金
国家自然科学基金资助项目(编号:20236010
20476025
20490200)
上海市教委资助项目
