VOSviewer (www.vosviewer.com) and CiteSpace () are software tools to build and visualize bibliometric networks. Compared with other visualization tools, they have a more concise operating interface and intuitive visualization results. Using the above two software programs to analyse the relationship between countries, journals, institutions, authors, research hotspots and references, the generated scientific knowledge map can present the knowledge framework of POM-based photocatalysis from a macro perspective.