Preparation method and application of efficient Bi4O5Br2/g-C3N5 composite photocatalytic material

The invention discloses a Bi4O5Br2/g-C3N5 composite photocatalytic material, a preparation method thereof and application of the Bi4O5Br2/g-C3N5 composite photocatalytic material in photocatalytic degradation of water pollutants. The Bi4O5Br2/g-C3N5 composite photocatalytic material is prepared through a simple hydrothermal method and a high-temperature calcination method. The prepared Bi4O5Br2/g-C3N5 composite photocatalytic material has the performance of photocatalytic degradation of water pollutants, which is higher than that of Bi4O5Br2 and the performance of photocatalytic degradation of water pollutants, of the Bi4O5Br2/g-C3N5. The prepared Bi4O5Br2/g-C3N5 composite photocatalytic material forms a p-n heterojunction to inhibit the compounding of photo-induced electrons and holes, so that the material can efficiently absorb visible light, thereby improving the utilization rate of sunlight and improving the photocatalytic degradation efficiency of pollutants. The method disclosed by the invention is simp