温度对介孔二氧化硅形貌和介相结构有序性的影响

作     者：庞雪蕾 任俊 唐芳琼 

作者机构：中科院理化技术研究所可控纳米制备实验室北京100101 

出 版 物：《无机化学学报》 (Chinese Journal of Inorganic Chemistry)

年 卷 期：2005年第21卷第2期

页      面：281-285页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 070301[理学-无机化学] 

基　　金：国家863计划(AA2002302108) 国家自然科学基金(200301015)资助项目 

主　　题：介孔二氧化硅 形貌控制 柱体 

摘      要：Silica particles with rod-like and top-like morphologies have been controllably synthesized with a basic medium. The characteristics of the mesoporous silica particles were characterized by X-ray diffraction (XRD), nitrogen sorption, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and high resolution transmission electron microscopy (HRTEM). The results indicate that temperature affects the macrostructures and mesostructure ordering of mesoporous silica. At lower temperature highly ordered mesoporous silica with hexastyle and top structure could be obtained under different alkalinity. As the temperature increases, mesoporous silica transforms to a rod-like shape and the aspect ratio of length/diameter decreases with the decrease of the order of mesostructure. When the temperature is high enough, spherical particles could be prepared and there are still defects existing in mesostructure.