Abstract:

Polyoxometalate (POM) is a kind of catalyst with excellent properties, but it is usually soluble in organic solvents and has a small specific surface area, which makes recovery and recycling difficult. Meanwhile, metal-organic framework (MOFs) is a porous loading material with a large specific surface area, high porosity, rich pore structure, and adjustable pore size. Starting from porous MOFs materials, this article reviewed how to promote POM to enter the pores of MOFs, constructing a type of MOFs confined POM material (POM@MOF). It clarified that this type of catalytic material could not only exert the efficient catalytic performance of POM, but also effectively utilize the porous properties of MOFs. The current research status in the field of oxidative desulfurization was also summarized. However, even though traditional powder catalysts had superior catalytic performance, their application in practical production was limited by issues such as difficulty in recovery and impact on recycling. Therefore, it was an effective way to shape and treat POM@MOF through methods such as forming fiber fixation and electrospinning. Finally, this article provided an outlook for the application of POM@MOF in the field of oxidative desulfurization, and proposed that the formation of POM@MOF was one of the important directions for future desulfurization applications.

Key words: catalyst, metal-organic framework, polyoxometalates, oxidation, regeneration

摘要：

多金属氧酸盐（POM），简称多酸，是一种具有优异性能的催化剂，但是其通常易溶于有机溶剂，且比表面积较小，导致回收和循环困难。同时，金属有机框架（MOFs）是一种比表面积大、孔隙率高、孔道结构丰富且孔径可调的多孔负载材料。本文从多孔MOFs材料出发，综述了如何促使POM进入MOFs孔隙中，构建得到一类MOFs限域的POM材料（POM@MOF），阐明该类催化材料不仅可以发挥POM高效催化的性能，同时可以有效利用MOFs多孔性能，并对其在氧化脱硫领域的研究现状进行了梳理。然而，即使传统的粉末催化剂具有较优的催化性能，但是不易回收、影响循环使用等问题限制了其在实际生产中的应用。因此，将POM@MOF通过成型纤维固载、静电纺丝等方法进行成型化处理是一条行之有效的方式。最后，本文对成型化POM@MOF在氧化脱硫领域的应用进行了展望，并提出了POM@MOF成型化是未来脱硫领域应用的重要方向之一。

关键词: 催化剂, 金属有机框架, 多金属氧酸盐, 氧化, 再生