原料中添加天然黏土室温合成介孔分子筛  

Synthesis of mesoporous molecular sieve by addition of natural clay in raw materials at room temperature

作　　者：姜廷顺[1] 唐雅静[1] 沈卫[1] 赵谦[1] 殷恒波[1] 

机构地区：[1]江苏大学化学化工学院,江苏镇江212013

出　　处：《化工学报》2008年第9期2390-2395,共6页CIESC Journal

基　　金：江苏省高校自然科学基金项目(04KJD130040);江苏大学高级人才基金项目(06JDG074)~~

摘　　要：室温条件下以天然黏土、硅酸钠和氯化铝为原料,十六烷基三甲基溴化铵(CTAB)为模板剂合成介孔分子筛。用XRD,TEM,FT-IR和N2物理吸附等手段对所合成的样品进行表征。结果表明:室温条件下添加天然黏土成功合成出介孔分子筛,其比表面积为902m2·g-1,平均孔径为3.97nm。经750℃下焙烧3h后,样品的比表面积降低,但介孔结构依然存在。在100℃下水热处理15d后比表面积为776.78m2·g-1,平均孔径为4.34nm,表明添加天然黏土室温下合成出的介孔分子筛具有高的热稳定性和水热稳定性。Mesoporous molecular sieves were synthesized by using natural clay, sodium silicate and aluminum chloride as raw materials and cetyl trimethyl ammonium bromide （CTAB） as template agent at room temperature alkaline condition. The as-synthesized samples were characterized by means of XRD, TEM, FT-IR and N2 physical adsorption. The results showed that mesoporous molecular sieve was successfully synthesized by addition of natural clay at room temperature, and had a specific surface area of 902m^2·g^-1 and an average pore size of 3.97 nm. After calcination at 750℃ for 3h, the specific surface area of the synthesized sample decreased, but the synthesized sample still had mesoporous structure. In addition, after hydrothermal treatment at 100℃ for 15 d, the synthesized sample had a specific surface area of 776.78m^2·g^-1 and an average pore size of 4.34nm, showing that mesoporous molecular sieve with highly thermal and hydrothermal stabilities was synthesized by addition of natural clay at room temperature.

关 键 词：天然黏土 介孔分子筛 稳定性 表征 

分 类 号：O643[理学—物理化学]