钛硅分子筛ETS-10的合成和表征  

Synthesis and characterization of titanosilicate molecular sieve ETS-10

作　　者：刘显灵[1] 王侨[1] 王磊[1] 袁鹏[2] 金英杰[1,2] 

机构地区：[1]辽宁石油化工大学化学与材料科学学院,辽宁抚顺113001 [2]辽宁石油化工大学石油化工学院,辽宁抚顺113001

出　　处：《化工科技》2012年第2期12-16,共5页Science & Technology in Chemical Industry

基　　金：辽宁省自然科学基金项目(200922180)

摘　　要：以硅酸钠溶胶、硫酸钛为起始原料,在含KF碱性水热体系中制备出ETS-10钛硅酸盐分子筛;考察了原料的配比、晶化时间与温度对ETS-10合成的影响。应用XRD、SEM、EDX、FTIR和N2吸附技术表征了合成的ETS-10的结构和物性。结果表明,用组成为n(SiO2)∶n(TiO2)∶n(Na2O)∶n(KF)∶n(H2O)=7.5∶1.0∶5.0∶3.0∶198的凝胶,在463K(48h)和无模板剂的条件下,合成出结晶度良好的ETS-10。ETS-10晶体具有规则的四方切角锥形晶貌和微孔性质,比表面积和孔容分别为383.75cm2/g和0.16cm3/g;典型样品的化学组成接近已知的ETS-10组成表达式(Na,K)2TiSi5O13.4H2O。By using sodium silicate and titanium sulfate as starting materials,ETS-10 titanosilicates were hydrothermally synthesized in a KF-containing alkaline system.Synthesis conditions were investigated,which were involved with the gel compositions,crystallization temperature and time impacting the ETS-10 crystal growth.The synthesized ETS-10 samples were characterized by XRD,SEM,EDX,FTIR and N2 adsorption-desorption.The results observed indicated that well-crystallized ETS-10 can be prepared at 463 K for 48 h by use of an organic template-free gel with the molar composition of 7.5 SiO2∶1.0 TiO2∶5.0 Na2O∶3.0 KF∶198 H2O.The resulting ETS-10 crystals exhibit the square truncated pyramidal crystal morphology and have an obvious microporosity since the specific surface area and pore volume are 383.75 cm^2/g and 0.16 cm^3/g,respectively.Chemical constitutions of typical ETS-10 samples were found to be close to the given formulation（Na,K）2TiSi5O13·4H2O.

关 键 词：钛硅分子筛 ETS-10 水热合成 晶体形貌 微孔性质 

分 类 号：TQ424.25[化学工程]