Preparation and performance evaluation of BiOI photocatalytic film

• In this paper, BiOI powder was prepared by hydrothermal method, and photocatalytic film was made by electrospinning technology. • The film has excellent hydrophilic properties and good optical properties, and effectively solves the problem that the powder photocatalyst is difficult to recycle and cannot be recycled. • And other issues. In practical application, the removal effect of 90 mg membrane catalyst on 10 mg/l MB can reach 94.2 % within 120 min, and the degradation effect is still more than 93 % after recycling, and the membrane is only slightly damaged. • Compared with the previous related reports, it is believed that the membrane is a new type of competitive membrane catalyst, which has broad application prospects in the treatment of organic wastewater. BiOI photocatalyst powder was prepared using the hydrothermal method. Using BiOI, PAN as the solute and DMF as the solvent, the mixed solution was stirred uniformly, and the photocatalytic film was prepared by an electrospinning machine. The microscopic morphology, pore size, and contact angle were characterised by scanning electron microscopy, N 2 adsorption and desorption, and contact angle tests. The photocatalytic performance of the film at different calcination temperatures was explored. The results show that the film has the best photocatalytic performance under the heat treatment conditions of 280℃ and 6 h, and the degradation rate of MB to 10 mg/L is 94.3 %. Meanwhile, different cycles of experiments show that the film photocatalyst has good stability and strong mechanical properties. After four cycles of experiments, the film showed almost no damage and the degradation rate could still reach 93.6 %. The films showed good degradation potential of organic dye wastewater and have good application prospect.