Preparation and application of composite photocatalyst g-C3N4-BiFeO3 for efficiently removing persistent organic pollutants

The invention discloses preparation and an application of a composite photocatalyst g-C3N4-BiFeO3 for efficiently removing persistent organic pollutants. The method adopts a sol-gel method for synthesis, and the g-C3N4-BiFeO3 composite photocatalyst is synthesized by one step with the sol-gel method. A xenon lamp is taken as a light source, BPA which is the persistent organic pollutant in the environment is taken as a photodegradation model, and a composite material and a BPA solution are mixed sufficiently for photocatalytic degradation and simulation of the BPA persistent organic pollutant in the water environment. The invention provides a method for efficiently removing the BPA in the water environment, more than 90% of the BPA in the water environment is removed within 2 hours with the method, the concentration is 10 mg/L, the performance is stable, the g-C3N4-BiFeO3 composite photocatalyst is synthesized successfully by one step for the first time, and the preparation and the application has great significance and development prospects in sewage treatment.