Research Progress of Niobium Phosphate for Catalytic Application
Acid catalysts are widely used in organic reactions,but traditional liquid acid catalysts have limitations in industrial applications due to their toxicity,corrosion and difficulty in separation and recovery,while solid acid catalysts have the advantages of their non-toxicity,non-corrosiveness and ease of separating.Compared to other solid acids,niobium phosphate exhibits excellent catalytic activity on account of high thermal stability,water resistance,high specific surface area,and abundant Lewis acid and Brønsted acid sites.Moreover,niobium phosphate can be used as a carrier to load other metals to prepare composite multifunctional catalysts,which is important for the development of environmentally friendly catalysts for biomass conversion,fine chemicals and other fields.In this paper,the research progress of phosphate-based catalysts in catalytic applications was presented,mainly including the application in dehydration,esterification,hydrolysis and alkylation reactions,as well as the application of niobium phosphate compounded with other metals in some tandem reactions.
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