Photocatalytic degradation of rhodamine B using Bi4O5Br2-doped ZSM-5

ZSM-5/Bi4O5Br2 composite catalyst based on the ZSM-5 zeolite and Bi4O5Br2 was prepared by in situ precipitation method at room temperature. The morphological, optical, structural, and photoelectrochemical properties of the composites were studied. The photocatalytic performance of the ZSM-5/Bi4O5Br2 photocatalyst was evaluated through degrading rhodamine B (RhB) dye under visible light irradiation. The photocatalytic result confirms that ZSM-5/Bi4O5Br2 photocatalyst with 1 wt% of ZSM-5 exhibits the best photocatalytic performance, and it achieves 99.86% removal efficiency in removing RhB within 25 min, and its reaction rate constant is 2.32 times that of pure Bi4O5Br2. The specific surface area of ZSM/Bi4O5Br2 is four times that of Bi4O5Br2, which provides more active sites for photocatalytic degradation. The improved photocatalytic activity of ZSM/Bi4O5Br2 composite is mainly attributed to the interaction between ZSM-5 and Bi4O5Br2, which increases the electron transfer of the interface. ·O2− and h+ are the main active groups in the photocatalytic degradation reaction system. These studies reveal that the catalyst is easy to prepare and is an efficient photocatalyst for RhB degradation. This study supplies a reference for the degradation of RhB by ZSM-5 composite Bi4O5Br2 photocatalyst induced by visible light at room temperature.