Microwave-Assisted Synthesis of Oxygen Vancancy Associated Bi-Tio2 Nanocomposite for Degradation of Rhb Under Visible Light Irradiation

Generally, a Bi-doped TiO2 nanocomposite was synthesized through a microwave-assisted hydrothermal method to introduce Bi4Ti3O12 and oxygen vacancy on the pristine TiO2. The optimized composite 6%Bi-TiO2 exhibits photocatalytic ability for degradation of Rhodamine B (RhB) which is about 13.7 times higher than the pristine TiO2. Furthermore, the catalyst retains good photocatalytic ability after 5 times recycling. The enhanced photocatalytic ability can be credited to the improved charge separation efficiency, caused by the alterant band structure after the anchoring of Bi4Ti3O12, and oxygen vacancy also plays a crucial role in the degradation process. This study offers insights into the application of microwave-assisted hydrothermal in effective synthesis of Bi4Ti3O12 on TiO2 by Bi-doped strategy.