Research progress in synthesis and application of polyionic-liquid heteropolyacid materials

Heteropolyacids (HPA), as a new type of green catalyst, have been widely used in various fields and achieved good results. However, its development is limited by some disadvantages, such as low surface area, easy self-aggregation and difficult recycling. As a kind of polyelectrolyte with configurable structure, polyionic-liquid (PIL) have the advantages of easy processing, strong tunability of chemical structure and function, and easy-separation from reactants. In order to solve the problems of HPA, a new type of polyionic-liquid heteropolyacid (PILH) with catalytic ability was prepared by organically combining PIL and HPA. This paper summarizes different synthesis methods of PIL and different combination methods of PIL with HPA. The application of PILH, mainly in electrochemistry, catalysis and adsorption field, is also summarized. It is considered that PILH have good application performance as a new kind of composite material, which provides reference for further research on the application of PILH.