High photocatalytic performance of Bi2O(OH)2SO4: Based on dual anion synergistic effect

Abstract A series of Bi2O(OH)2SO4 samples have been successfully synthesized via the hydrothermal method by changing the concentrations of Na2SO4, which exhibit a straw-like structure. Herein, the sample with the addition of Na2SO4 was 1.5 mmol (BS-1.5) exhibiting the best photocatalytic performance due to the role of SO42− anion groups. In addition, the exceedingly positive valence band (VB, 4.35 eV) is contributing to the production of OH. Furthermore, an amount of ROS is produced due to the synergistic effect of SO4− and OH−, and result in the excellent catalytic performance. In summary, Bi2O(OH)2SO4 is suitable for practical application in the field of the water purification.