镧对CoMCM-41介孔分子筛结构的影响  

EFFECT OF RARE EARTH LANTHANUM ON STRUCTURE OF CoMCM-41 MESOPOROUS MOLECULAR SIEVE

作　　者：姜廷顺[1] 陈倩倩[1] 刁永华 赵谦[1] 沈卫[1] 李梅[1] 

机构地区：[1]江苏大学化学化工学院,江苏镇江212013 [2]江苏茂源化工集团有限公司,江苏镇江212013

出　　处：《精细石油化工》2008年第3期39-42,共4页Speciality Petrochemicals

基　　金：江苏省高校自然科学基金(04KJD130040);江苏大学高级人才基金(JDG2006074)

摘　　要：以硅酸钠、氯化钴和氯化镧为原料,十六烷基三甲基溴化铵为模板剂,通过水热法合成了CoMCM-41介孔分子筛和Co-LaMCM-41介孔分子筛。采用XRD、FT-IR、TEM、N_2吸附-脱附等方法对试样的物化性能进行表征,结果表明:合成出了具有介孔结构的CoMCM-41和Co-LaMCM-41,550℃焙烧可以将模板剂有效去除并不影响介孔结构。CoMCM-41的比表面积为897.25 m^2/g,Co-LaMCM-41的比表面积为508.85 m^2/g。引入稀土元素镧使CoMCM-41介孔分子筛的比表面积下降,平均孔径增大,介孔有序性降低。CoMCM-41 and Co-LaMCM-41 mesoporous molecular sieves were synthesized by a hydrothermal method using sodium silicate, cobalt chloride and lanthanum chloride as raw materials and cetyl trimethyl ammonium bromide as template. The synthesized samples were characterized by X ray diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy and N2 physical adsorption techniques. The results showed that CoMCM-41 and Co-LaMCM-41 samples were mesoporous. After calcinations at 550 ℃, the template was effectively removed and the mesoporous structure of the as synthesized samples was not damaged. CoMCM-41 and Co-LaMCM-41 had specific surface area of 897.25 and 508.85 m^2/g, respectively. When the rare earth element lanthanum was introduced, the specific surface area decreased, the average pore size increased and the ordering of the mesopores decreased.

关 键 词：CoMCM-41介孔分子筛 Co—LaMCM-41介孔分子筛 合成 水热法 稀土 镧 

分 类 号：TQ426[化学工程] O643[理学—物理化学]