Graphite-phase carbon nitride photocatalyst for sewage treatment as well as preparation method and application thereof

The invention discloses a graphite-phase carbon nitride photocatalyst for sewage treatment as well as a preparation method and application thereof. The preparation method of the graphite-phase carbon nitride photocatalyst for sewage treatment comprises the following step: carrying out a temperature-programmed hydrothermal reaction on a system dispersed with graphite-phase carbon nitride in a closed environment to obtain the graphite-phase carbon nitride photocatalyst. According to the invention, the graphite-phase carbon nitride is modified based on the temperature-programmed hydrothermal reaction in the closed environment, and yield is 80% or above; the photocatalytic degradation activity test result of the photocatalyst shows that the activity is improved by 4 times compared with the activity before modification, and the advantages of high yield and good performance of the graphite-phase carbon nitride photocatalyst are obtained. 本发明公开了一种污水处理用石墨相氮化碳光催化剂及其制备方法和应用，该污水处理用石墨相氮化碳光催化剂的制备方法包括：将分散有石墨相氮化碳的体系在密闭环境中经程