硅酸盐学报2011，Vol.39Issue(2)：278-284,7.
硅源对合成介孔MCM-41分子筛结构、织构及其形貌的影响
Influence of Silica Source on the Structure, Texture and Morphology of the Mesoporous MCM-41 Molecular Sieves
摘要
Abstract
Mesoporous MCM-41 molecular sieves modified by vanadium (V-MCM-41) were synthesized by hydrothermal method using inorganic silica sources (Na2SiO3'9H2O, colloidal silica and Na2O'3.3SiO2) and organic silica source (tetraethyl orthosilicate,TEOS), respectively, and CH3(CH2)15'(CH3)3NBr(CATB) as template. The influences of different silica sources in different pH values conduction on the specific surface area, total pore volume and average pore diameter of the V-MCM-41 molecular sieves were investigated. The results indicate that the synthesis processes are different with different silica sources and pH value. The V-MCM-41 molecular sieve materials can be prepared by inorganic silica sources in alkali condition (pH≈9.5-11.5) propitiously, and by organic silica (TEOS) not only in acid (pH≈5.5) but also in alkali condition (pH≈l0.5). The specific surface area SBET and total pore volume Vp of the V-MCM-41 molecular sieves prepared by inorganic silica source are 1 000m2/g and 1.0mL/g, respectively, and it is larger than that prepared by organic silica (SBET≈800 m2/g, Vp≈0.8 mL/g). No obvious difference of the pore diameter size is observed. It is due to the different speed of hydrolyzation and polymerization of different silica sources, which result in different polymer form. The different polymer may make a difference with the reciprocity between the surfactants and silica source.关键词
分子筛/介孔结构/硅源/水热合成/分子筛织构Key words
molecular sieve/ mesoporous structure/ silica source/ hydrothermal synthesis/ molecular sieve texture分类
化学引用本文复制引用
许俊强,储伟..硅源对合成介孔MCM-41分子筛结构、织构及其形貌的影响[J].硅酸盐学报,2011,39(2):278-284,7.基金项目
重庆市科委基金(CSTC,2008BB7334) （CSTC,2008BB7334）
重庆市教委基金(KJ090616),重庆理工大学基金(2007ZD14)资助项目. （KJ090616）
