石油化工2012，Vol.41Issue(2)：143-149,7.
Ti-SBA-15介孔分子筛的制备与表征
Synthesis and Characterization of Ti-SBA-15 Mesoporous Molecular Sieves
刘红梅 1张明森 1王焕茹 1黄文氢1
作者信息
- 1. 中国石化北京化工研究院,北京100013
- 折叠
摘要
Abstract
Ti-SBA-15 mesoporous molecular sieves were hydrothcrmally synthesized by one-step method, using sodium silicate as the Si source, titanium trichloride as the Ti source and surface active agent P123 as the template. The effects of HC1 concentration, n(Si) : n(P123), crystallization temperature and n(Si) : n(Ti) on the structure properties of Ti-SBA-15 mesoporous molecular sieve samples were investigated by means of XRD, N2 adsorption, TEM and UV-Vis techniques. It is indicated that, appropriate synthesis mother liquor acidity, Si source concentration and crystallization temperature could improve the structural orderliness of Ti-SBA-15 mesoporous molecular sieves, and increase its specific surface area and pore volume. Exorbitant crystallization temperature would result in the increase in pore size, the decreases of wall thickness and crystallinity, and the formation of hexahedral-coordinated Ti species outside the framework. In the condition of n(Si) : n(Ti) more than 20, the Ti atoms primarily existed in the form of tetrahedral-coordination in the framework of Ti-SBA-15 mesoporous molecular sieves.关键词
水玻璃/Ti-SBA-15介孔分子筛/水热合成/分子筛催化剂Key words
sodium silicate/ Ti-SBA-15 mesoporous molecular sieve-, hydrothermal synthesis/molecular sieve catalyst分类
化学化工引用本文复制引用
刘红梅,张明森,王焕茹,黄文氢..Ti-SBA-15介孔分子筛的制备与表征[J].石油化工,2012,41(2):143-149,7.
