Influence of Modification Amount, Reactant Concentration and pH Value on the Photocatalytic Activity of Ionic Liquid Modified TiO2 Under Visible Light

Abstract

Ionic liquid ([Bmim]OH, [Bmim]Br, [Bmim]BF4) modified TiO2 catalysts were prepared by hydrothrmal method. XRD and UV-visible spectra were used to characterize the prepared composite materials. Ionic liquid modification did not change the crystalline structure of TiO2 particles but reduced the particle size. [Bmim]OH modified TiO2 shows the obviously enhanced visible light absorption. The influence of ionic liquid types, modification amount, reactant concentration and pH value on the photocatalytic activity of TiO2 catalyst under visible light were investigated.