Prepared 3D flower-like Au@N-Bi2O2CO3/g-C3N4 heterojunction with enhanced separation ability of carriers for effectively degradation of pollutants

Abstract

In this work, 3D flower-like Au@N-Bi2O2CO3/g-C3N4 heterojunction was successfully prepared by deposition method. The loading content of Au was regulated to enhance the light absorption performance and accelerate the separation of photogenerated carriers. The crystal structure and microstructure of the photocatalyst were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The activity of heterojunction photocatalysts was investigated by the degradation of sodium isobutyl xanthate (SIBX) and p-cresol under the simulated sunlight. The results show that the 2 %Au@N-Bi2O2CO3/g-C3N4 heterojunction exhibits the highest photocatalytic activity for the degradation of SIBX and p-cresol, which was 3.6 and 3.7 times of that of the pristine N-Bi2O2CO3/g-C3N4, respectively. This work provides useful guidance for the construction of heterojunctions with excellent photocatalytic properties.