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Synthesis of Ti-containing extra-large-pore zeolites of Ti-CIT-5 and Ti-SSZ-53 and their catalytic applications
Microporous and Mesoporous Materials ( IF 4.8 ) Pub Date : 2018-10-06 , DOI: 10.1016/j.micromeso.2018.10.003
Jin-Gui Wang , Hongjuan Wang , Toshiyuki Yokoi , Takashi Tatsumi

Introduction of titanium into the frameworks of 14-ring extra-large-pore zeolites with CIT-5 (CFI-type, 7.2 × 7.5 Å) and SSZ-53 (SFH-type, 6.4 × 8.7 Å) topology has successfully been conducted by a chemical vapor deposition (CVD) method. The prepared titanosilicate zeolites have been characterized by XRD, SEM, UV–vis spectroscopy, IR spectroscopy, N2 adsorption, and elemental analysis. According to the characterization data, titanium is mostly incorporated into the framework of the zeolite in a tetrahedrally coordinated state. The catalytic epoxidation of cycloalkenes with H2O2 and tert-butyl hydroperoxide (TBHP) has been measured. The prepared titanosilicates with extra-large pores show superior performances for bulky molecule oxidation using TBHP as an oxidant compared to medium-pore TS-1 and large-pore Ti-beta.



中文翻译:

Ti-CIT-5和Ti-SSZ-53的含钛超大孔沸石的合成及其催化应用

通过CIT-5(CFI型,7.2×7.5Å)和SSZ-53(SFH型,6.4×8.7Å)拓扑结构成功地将钛引入14环超大孔沸石的骨架中化学气相沉积(CVD)方法。制备的钛硅酸盐沸石已通过XRD,SEM,UV-可见光谱,IR光谱,N 2吸附和元素分析进行​​了表征。根据表征数据,钛大部分以四面体配位状态结合到沸石的骨架中。H 2 O 2对环烯烃的催化环氧化并测量了叔丁基氢过氧化物(TBHP)。与中孔TS-1和大孔Ti-β相比,使用TBHP作为氧化剂制备的具有大孔的钛硅酸盐显示出对大分子氧化的优异性能。

更新日期:2018-10-06
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