Based on CiteSpace software, big data bibliometrics analysis was carried out on the keywords of papers of photocatalytic materials published in 2020. Tracking the hotspots and directions can help young scholars to understand the latest progress. In the Web of Sciences, 4147 related papers were searched with "photocatalytic materials" as the main topic. Cluster analysis showed that the hotspots were g-C₃N₄, Mxene and metal-organic frameworks (MOF) and titanium dioxide (TiO₂).