A novel g-C3N4/BiOI/Ag2WO4 heterojunction for efficient degradation of organic pollutants under visible light irradiation

Abstract

In recent years, photocatalytic technology has attracted wide attention in the treatment of dye wastewater due to its green and efficient performance. In this study, a novel heterojunction of g-C3N4/BiOI/Ag2WO4 was synthesized and the photocatalytic activity was evaluated through degrading Sudan red III. The results of XRD, FT-IR, SEM, TEM and XPS revealed that BiOI and Ag2WO4 were successfully loaded onto the surface of g-C3N4. According to the results of UV–vis DRS and PL spectra, the g-C3N4/BiOI/Ag2WO4 exhibited excellent photocatalytic activity. Moreover, the g-C3N4/BiOI/Ag2WO4 showed an excellent efficiency for the degradation of Sudan red Ⅲ and the degradation rate up to 89% in 90 min. The novel photocatalyst significantly shortened the degradation time, and improved the degradation rate. This study provided a theoretical basis for efficient degradation of Sudan red Ⅲ.