Recent Progress in Photocatalysis of g-C$lt;inf$gt;3$lt;/inf$gt;N$lt;inf$gt;4$lt;/inf$gt;

Based on photocatalysts, solar energy can be converted into the energy that human can directly utilize, so as to solve the problems such as the depletion of the Earth's resources and the deterioration of living environments.The unique structure of g-C 3 N 4 gives it good photocatalytic performance.Its development and utilization have been a research hotspot recently.Generally, g-C 3 N 4 can be used in the degradation of pollutions, hydrolysis to generate hydrogen and oxygen, organic synthesis and oxygen reduction.However, in practical, its performance is not satisfactory.Researchers have tried many new methods to improve its photocatalysis, which include physical coupling modification, chemical bonding modification and microstructural modification.The review summarizes its photocatalysis and improving methods, briefly illustrates the catalysis mechanism, and presents detailed discussions and analysis on the existing problems as well as potential applications.