Similarly, the number of scientific publications published by each institution can also reflect their scientific research strength. The 1382 relevant publications from 765 different institutions. The top 10 institutions with the highest number of publications globally are shown in Table , with nine of the top 10 institutions come from China. Northeast Normal University ranked first because of its 219 scientific publications. Chinese Academy of Sciences and Bohai University both ranked second with 102 papers, and their total number of publications is lower than Northeast Normal University. The top three institutions published more than 30% of the global total. Islamic Azad University ranks ninth and is the only institution from outside China. VOSviewer was used to analyze published scientific publications of institutions. Among the 765 different institutions, 186 have published one paper, and only 72 have published more than five papers. Many data with low research significance are excluded, and institutions with more than one published paper are visualized, as shown in Figure . Among the top 10 institutions, Northeast Normal University, Chinese Academy of Sciences and Henan University closely cooperate with many institutions in China. The cooperation between Bohai University and other institutions is relatively small, mainly relying on internal cooperation. In addition, the institutions of Iran, France and Italy also have cooperative relations that cannot be ignored. Most of the institutional cooperation on POM-based photocatalysis is limited to a country without breaking the boundaries of the search for potential cross-border cooperation.