In this paper, a new strategy was proposed to synthesize a novel composite of highly dispersed ZIF-8 embedded in porous Al₂O₃ by a solvent-free method. This is a very simple, efficient, and eco-friendly method, in which ZnO/Al₂O₃ was used as a precursor, and dimethyl imidazole was used as an organic ligand. Meso- and microporous composite of [email protected]₂O₃ was synthesized arising from the crystal growth of ZIF-8 derived from ZnO nanoparticles. Characterization results reveal that the distribution of micropores and mesopores can be controlled by simply adjusting the amount of zinc salt supported on Al₂O₃. The value of this composite is that it can simultaneously exert the advantages of ZIF-8 and Al₂O₃ support, which can significantly decrease the particle size of ZIF-8 and improve its utilization efficiency. The micropores of ZIF-8 can increase the dispersion of Pt nanoparticles, at the same time, the functional groups on the surface of Al₂O₃ can improve the selectivity of the product. Furthermore, this kind of composite material can be extended by replacing the support. Finally, the results of the activity tests showed that the obtained Pt/[email protected]₂O₃ catalyst exhibits high activity and selectivity in hydrodearomatization (HDA) and hydrodeoxygenation (HDO) reactions.

本文提出了一种新策略，采用无溶剂法合成嵌入多孔Al ₂ O _3中的新型高分散ZIF-8复合材料。这是一种非常简单，高效且环保的方法，其中ZnO / Al ₂ O ₃被用作前体，二甲基咪唑被用作有机配体。合成了[电子邮件保护的] ₂ O _3的介孔和微孔复合物，该复合物是由源自ZnO纳米粒子的ZIF-8的晶体生长引起的。表征结果表明，可以通过简单地调节负载在Al ₂ O ₃上的锌盐的量来控制微孔和中孔的分布。该复合材料的价值在于它可以同时发挥ZIF-8和Al ₂ O ₃载体的优势，可以显着减小ZIF-8的粒径并提高其利用效率。ZIF-8的微孔可以增加Pt纳米颗粒的分散性，同时Al ₂ O ₃表面的官能团可以提高产物的选择性。此外，可以通过更换支撑件来扩展这种复合材料。最后，活性测试的结果表明，所获得的Pt / [电子邮件保护的] ₂ O ₃催化剂在加氢脱芳香化（HDA）和加氢脱氧（HDO）反应中显示出高活性和选择性。