New Strategy to Synthesis of Hierarchical Mesoporous Zeolites
New Strategy to Synthesis of Hierarchical Mesoporous Zeolites
复制标题
多级孔介孔沸石合成新策略
DOI：
10.1021/cm903785r
复制
发表时间：
2010-03
影响因子：
8.6
通讯作者：
中科院分区：
文献类型：
--
作者：
采用介孔阳离子表面活性剂十六烷基三甲基溴化铵（CTAB）胶束与叔丁醇（TBA）和1，3，5-三甲基苯（TMB）作为共溶剂，通过分子筛碎片在介孔表面活性剂胶束上的凝聚形成分级介孔结构，从而合成了分级介孔分子筛.首次合成了具有Y型分子筛和方钠石碎片的分级介孔氧化硅材料，该材料既具有分子筛的介孔结构，又具有分子筛的典型衍射特征。采用XRD、N2吸附-脱附、27 Al MAS NMR、FTIR和NH3-TPD等技术对样品进行表征，并通过NPYR（N-亚硝基吡咯烷）和NNN（N-亚硝基去甲烟碱）的吸附性能评价了沸石介孔材料的吸附性能。采用分子筛凝胶组装法合成的MS 3 - 4 t-5 b样品对空气中NPYR的吸附性能与NaY分子筛相当。
We report a new strategy to synthesize the hierarchical mesoporous zeolite through design of mesoscale cationic surfactant cetyltrimethylammonium bromide (CTAB) micelle with cosolvent tert-butyl alcohol (TBA) and the 1,3,5-trimethylbenzene (TMB) additive, by which the formation of hierarchical mesostructure arose from the condensing of zeolite fragments on the mesoscale surfactant micelles. The hierarchical mesoporous silica with zeolite Y or sodalite fragment is synthesized for the first time, which exhibited both the mesostructure and the typical diffraction of zeolite. XRD, N2 adsorption−desorption, 27Al MAS NMR, FTIR, and NH3-TPD techniques were employed to characterize the resulting samples, and the adsorption of NPYR (N-nitrosopyrrolidine) and NNN (N-nitrosonornicotine) were performed to assess the adsorptive capability of the zeolitic mesoporous materials. The MS3-4t-5b sample synthesized by assembling zeolite gel exhibited the adsorptive capacity comparable to NaY zeolite for trapping NPYR in airf...