用脱镁海泡石制备介孔分子筛MCM-41(英文)  

MESOPOROUS MOLECULAR SIEVES MCM–41 PREPARED FROM POST-Mg– EXTRACTION SEPIOLITE

作　　者：金胜明[1] 肖飞[1] 杨华明[1] 邱冠周[1] 杨敏[2] 

机构地区：[1]中南大学资源加工与生物工程学院 [2]中南大学冶金科学与工程学院,长沙410083

出　　处：《硅酸盐学报》2006年第4期403-407,共5页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(50304014)资助项目。

摘　　要：以脱镁海泡石为硅源,在水热条件下合成介孔分子筛MCM–41。考察了晶化时间、晶化温度、pH值等因素对介孔分子筛MCM–41的影响。用X射线衍射分析、Brumauer–Emmett–Teller法和红外分析表征MCM–41。结果表明:在pH值为12,晶化温度为100℃,晶化时间为24h时,所得MCM–41的结晶度最好,比表面积为860m2/g,孔体积为0.77cm3/g,孔径为2.9nm,孔壁厚为1nm。红外分析表明:脱镁海泡石在合成介孔分子筛MCM–41过程中生成了≡≡SiO–—CTA+络合物。Mesoporous molecular sieves MCM - 41 were synthesized by the hydrothermal reconstruction method with post-Mg - extraction sepiolite as the silica source. The effects of crystallization time, pH value and crystallization temperature on the formation of MCM - 41 were investigated. The structure, pore size distribution and specific surface area of MCM - 41 were characterized by X-ray diffraction, Brumauer - Emmett - Teller method and infrared analysis. The results show that the hexagonal MCM - 41 is formed in alkaline solution ofpH=12 when crystallization is carried out at 100 ℃ for 24 h. The specific surface area, pore size and pore volumes of MCM- 41 from post-Mg- extraction sepiolite are 860 m2/g, 2.9 nm and 0.77 cm3/g, respectively. The IR results illustrate that the complex of ≡SiO -CTA＋ was formed during synthesis of MCM - 41 from post-Mg - extraction sepiolite.

关 键 词：海泡石 介孔分子筛 水热 

分 类 号：TD98[矿业工程—选矿]