Growth of AgBr/Ag_3PO_4 Heterojunction on Chitosan Fibers for Degrading Organic Pollutants

摘要

Using Fiber as the based material for photocatalyst particles is favorable for their recovery, thereby avoiding the photocata-lyst particles cause secondary pollution to water environment. In this work, the AgBr and Ag_3PO_4 photocatalyst particles were loaded onto the surface of chitosan fiber (CF) via chelation and in situ anion-exchange method. The photocatalytic results illustrated that the AgBr/Ag_3PO_4/CF composites displayed the best photocatalytic performance when the mass ratio of Ag_3PO_4 and AgBr onto the CF was approximately 1:0.15, their degradation rate can reach 98.1% for the methyl orange (MO) solution, this value far exceeded those of pure CF, AgBr/CF composites, and Ag_3PO_4/CF composites. Besides, the AgBr/Ag_3PO_4/CF composites also shown excellent durability, after the fifth cycle, they still maintained a decolorization rate of 86.4% for the MO solution, while the Ag_3PO_4/CF composites maintained a decolorization rate of only 70.7%. Based on these results, we consider that the AgBr/Ag_3PO_4/CF composites have high practical interest in environmental remediation.