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首页> 外文期刊>RSC Advances >Efficient molybdenum(VI) modified Zr-MOF catalysts for epoxidation of olefins
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Efficient molybdenum(VI) modified Zr-MOF catalysts for epoxidation of olefins

机译：高效钼（VI）改性的Zr-MOF催化剂用于烯烃的环氧化

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摘要

Efficient molybdenum(VI) modified Zr-MOF catalysts have been successfully prepared for the epoxidation of olefins. The stable and porous Zr-MOF (UiO-66(NH2)) was modified with salicylaldehyde, pyridine-2-aldehyde, or 2-pyridine chloride by the post-synthesis modification (PSM) method, and then the Mo-based catalyst was loaded by a chelating method. The MOFs not only act as the carriers of the Mo(VI) catalyst, but also improve the contacting ability between the substrate and the active center of the Mo(VI) compound. The high dispersion of the Mo catalyst on Zr-MOF and the big pore size of MOF guarantee sufficient contact between substrate and catalytic active center, thus accelerating the rate of reaction and providing improved catalytic efficiency for the epoxidation of olefins. The obtained Zr-MOF catalyst exhibited high activity for the epoxidation of olefins with 70 wt% tert-butyl hydroperoxide (TBHP) or 30% H2O2 as the oxygen sources. Furthermore, MoO2(acac)(2) loaded Zr-MOF was prepared in the same way, and it also showed good catalytic performance for the epoxidation of olefins.
机译：高效的钼（VI）改性的Zr-MOF催化剂已经成功地制备用于烯烃的环氧化。通过合成后改性（PSM）方法，用水杨醛，吡啶-2-醛或2-吡啶氯化物对稳定且多孔的Zr-MOF（UiO-66（NH2））进行改性，然后将Mo基催化剂通过螯合方法加载。 MOF不仅充当Mo（VI）催化剂的载体，而且还提高了底物与Mo（VI）化合物活性中心之间的接触能力。 Mo催化剂在Zr-MOF上的高分散度和MOF的大孔径确保了底物与催化活性中心之间的充分接触，从而加快了反应速度并提高了烯烃环氧化的催化效率。所获得的Zr-MOF催化剂对于以70wt％的叔丁基氢过氧化物（TBHP）或30％的H 2 O 2作为氧源的烯烃的环氧化表现出高活性。此外，以相同的方式制备了MoO2（acac）（2）负载的Zr-MOF，它对烯烃的环氧化也显示出良好的催化性能。

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