Synergistic Degradation Of Organic/Inorganic Pollutants And Photocatalytic Sterilization Performance By Fe^??HQS?₃/TiO₂ Nanotubes Under Visible Light

TiO₂ has been used to decompose environmental pollutions because of its excellent photocatalytic activity.However,the wide band gap of titanium dioxide limits its application in sunlight.In this paper,a metal organic complex with a certain conjugate structure is used to sensitize TiO₂ in order to expand its optical response range from UV to visible light region and improve its pghotocatalytic activity.The main work is as follows:?1?Fe^?-8-hydroxyquinoline-5-sulfonic acid complex(Fe^?-HQS)was bonded to the surface of TiO₂ nanotube,which was prepared by hydrothermal method.?2?The physical and chemical properties of the composite photocatalyst Fe^??HQS?₃/TiO₂ were characterized by XRD,TEM,SEM,BET and UV-vis.?3?The degradation efficiency of phenol under different conditions to synthetize the composite photocatalyst,such as the doping amount of the complex,the hydrothermal synthesis temperature and time had been investigated when a 300W xenon lamp was used as a visible light source.?4?It had been found that the ynergistic degradation of 2,4-two chlorophenol and Cr??? under visible light could be achieved by using Fe^??HQS?₃/TiO₂ nanotube composite photocatalyst effectively.The possible mechanism of synergistic photocatalytic reaction is proposed through the analysis of electrochemistry and active species capture experiments.?5?The composite photocatalyst Fe^??HQS?₃/TiO₂ nanotube was used to kill Escherichia coli and the sterilization process was characterized by SEM.