乙醇-水体系中纤维状ZrAPO-11分子筛的合成与表征  

Synthesis and Characterization of ZrAPO-11 Molecular Sieves with Fiber Structure in Ethanol-Water System

作　　者：罗小林[1] 陈亚芍[2] 

机构地区：[1]植物化学陕西省重点实验室宝鸡文理学院化学化工系,陕西宝鸡721013 [2]应用表面与胶体化学教育部重点实验室陕西师范大学化学与材料科学学院,陕西西安710062

出　　处：《石油化工》2011年第10期1046-1051,共6页Petrochemical Technology

基　　金：陕西省教育厅项目(11JK0603);宝鸡文理学院院级项目(ZK08117)

摘　　要：以二异丙胺为模板剂,在乙醇-水体系中合成了纤维状结构的ZrAPO-11分子筛。利用XRD、SEM、N2物理吸附BET和吡啶吸附FTIR等技术对所合成的产物进行了表征。表征结果显示,增大醇水比,ZrAPO-11分子筛的形貌从棒状转变为纤维状;Zr离子的引入有助于分子筛的结晶并改善晶体的形貌;利用HF的配合作用,ZrAPO-11分子筛的形貌也从块状转变为片状,最终转变为纤维状;在醇水体系中HF作用下,ZrAPO-11分子筛的结晶速率明显减缓;所合成的ZrAPO-11分子筛为长度约15μm、宽度50 nm、厚度约10 nm的纳米纤维,比表面积高达397.4 m2/g,并具有较多的B酸中心。ZrAPO-11 molecular sieves with fiber structure were synthesized with diisopropylamine as template in an ethanol-water system. The products were characterized by means of XRD, SEM, N2 physical adsorption BET and pyridine adsorbed FFIR. The morphologies of the ZrAPO-11 molecular sieves were transformed from rod shape to fiber shape by increasing the ratio of ethanol to water. The crystallinity and morphology of the ZrAPO-11 molecular sieves were improved by introducing zirconium ions. The morphologies of the ZrAPO-11 molecular sieves were also transformed from clump shape and then plate shape to fiber shape by addition of HF. In the ethanol-water system, the addition of HF resulted in reduction of the crystallization rate of the ZrAPO-11 molecular sieves. The product with 397.4 m2/g BET surface area and the fiber structure of 15 p,m length, 50 nm width and 10 nm thickness were prepared. The prepared ZrAPO-11 molecular sieves had many Bronsted acid sites.

关 键 词：乙醇-水体系 ZrAPO—11分子筛 纤维结构 晶体 

分 类 号：TQ426.6[化学工程]