Synthesis of Bi2WO6/g-C3N4 heterojunction on activated carbon fiber membrane as a thin-film photocatalyst for treating antibiotic wastewater

Abstract

Photocatalysts usually exist in powder form, which limits their practical application in photocatalytic degradation of antibiotics in wastewater. To solve this problem. Here, we report the construction of Z-scheme Bi 2 WO 6 /g-C 3 N 4 on activated carbon fiber membrane (ACF) as a thin-film photocatalyst. The catalyst was characterized by XRD, SEM, XPS and other means. Chlortetracycline was used as a model pollutant to study the photocatalytic activity of the sample. According to the results of XPS and XRD, the composite material was successfully prepared. Ultraviolet diffuse reflectance characterization showed that the edge and intensity of the absorption band of the composite material were enhanced. The photodegradation experiment of chlortetracycline shows that 10% Bi 2 WO 6 /g-C 3 N 4 /ACF (area: 4 × 4 cm 2 ) has the best photocatalytic activity. Cycling experiments have proved that the 10% Bi 2 WO 6 /g-C 3 N 4 /ACF composite material has a stable degradation ability during the photodegradation process. Therefore, Bi 2 WO 6 /g-C 3 N 4 /ACF can be used as a recyclable, large surface area photocatalyst to eliminate water Antibiotics in the environment.