动态水热合成b轴取向MFI型分子筛膜  

Dynamic Hydrothermal Synthesis of a b-Oriented MFI Zeolite Film

作　　者：李显明[1] 王正宝[1] 郑洁[1] 邵世群[1] 王胤超[1] 严玉山[1,2] 

机构地区：[1]浙江大学化学工程与生物工程学系,浙江杭州310027 [2]加州大学河滨分校化学工程与环境工程系,美国加利福尼亚州92521

出　　处：《催化学报》2011年第2期217-223,共7页

基　　金：浙江省自然科学基金(R4090099);中国博士后科学基金(20090461362;201003718);南京工业大学材料化学工程国家重点实验室开放课题

摘　　要：在旋转烘箱中采用动态水热法,在不锈钢片支撑体上合成了连续的b轴取向MFI型分子筛膜,并运用扫描电镜和X射线衍射考察了合成釜转速、晶化温度和晶化时间对所得分子筛膜性能的影响.与静态水热法相比,动态水热合成过程中合成液的温差和浓度差大大降低,且合成液持续冲刷支撑体表面,使得动态法具有合成时间短、取向性好和分子筛颗粒粒径分布均一的优点.Continuous b-oriented MFI zeolite films were prepared on stainless steel substrates by dynamic hydrothermal synthesis using a rotating convection oven. The influences of rotation speed,crystallization temperature and crystallization time were studied. X-ray diffraction was used to identify the orientation of the zeolite films. Compared with the static method,a shorter synthesis time,a more uniform particle size distribution and better film orientation were observed for the dynamic method,and this is attributed to the low concentration and thermal gradients that exist in the bulk solution and to the washing action of the bulk solution toward the substrate surface.

关 键 词：动态水热法 b轴取向 MFI型分子筛 分子筛膜 静态水热法 

分 类 号：O643.36[理学—物理化学]