Hydrothermal Synthesis of Disk-Like Bi2WO6-BiPO4 Heterojunctions and Enhanced Photocatalytic Performance for Rhodamine B Degradation (cited: 1)
- Received Date: 2014-08-25
Abstract: Novel Bi2WO6-BiPO4 photocatalysts with heterojunction structure were fabricated through a facile hydrothermal route. The photocatalytic properties of Bi2WO6-BiPO4 composites were evaluated by photocatalytic degradation of rhodamine B (Rh B) under simulated sunlight irradiation. The results showed that Bi2WO6-BiPO4 photocatalysts displayed much higher photocatalytic performances for Rh B degradation than the single BiPO4 and Bi2WO6. The best photocatalytic activity of Bi2WO6-BiPO4 with nearly 100% Rh B degradation located at molar ratio of 1:1 after 20 min irradiation. The enhanced photo-catalytic performance could be mainly ascribed to the formation of heterojunction interface in Bi2WO6-BiPO4 which facilitated the transfer and separation of photogenerated electron-hole pairs, as well as the strong visible light absorption originating from the sensitization role of Bi2WO6 to BiPO4. It was also found that the photodegradation of Rh B molecules was mainly attributed to the oxidation action of the generated 2· - radicals and partly to the action of h+ vb via direct hole oxidation process.
|Citation:||Xue Lin, Xiao-yu Guo, Shi-duo Zhao, Xin Gao, Hong-ju Zhai, Qing-wei Wang, Li-min Chang. Hydrothermal Synthesis of Disk-Like Bi2WO6-BiPO4 Heterojunctions and Enhanced Photocatalytic Performance for Rhodamine B Degradation (cited: 1)[J]. Chinese Journal of Chemical Physics , 2014, 27(6): 725-731. doi: 10.1063/1674-0068/27/06/725-731|