Tóm tắt

The practical application of Ag/AgBr is restricted by the photocorrosion problem and rapid combination of thernplasmon-induced electron-hole pairs during photoreactions. Herein, we introduced halloysite-nanotubes (HNTs)rninto Ag/AgBr system to fabricate a series of novel Ag/AgBr/HNTs composites. The degradation of Rhodamine Brnand killing of gram-negative bacterium Escherichia coli under illumination was employed to test the photorncatalytic activity of these modified silver-based catalysts. The results showed that Ag/AgBr/HNTs compositesrnprocessed excellent visible-light-driven disinfection activity, splendid photocatalytic performance and goodrncatalytic stability. Based on the experimental observations and characterization results, the main reasons were asrnfollows: first, HNTs serves as a support in the composite and prevent the decomposition of Ag/AgBr particles;rnsecondly, the charged surface of HNTs can effectively boost the separation of electron-hole pairs and promote thernadsorption of reactants. In a word, this work could provide a new approach to design highly efficient photorncatalyst for water purification.