TiO2/bauxite-tailings(TiO2/BTs) composites were prepared via a chemical liquid deposition method and characterized by X-ray diffractometry(XRD),scanning electronic microscopy(SEM) and N2 adsorption analysis.The photocatalytic performance of TiO2/BTs composites was evaluated with UV-Vis spectrophotometer following the changes of phenol concentration under different illumination time.Effects of the calcination temperature,the pH and the cycles on the photocatalytic activity of TiO2/BTs composites were investigated.The composites calcined at 500 and 600 ℃ exhibit the best photocatalytic performance,and the phenol degradation ratios reacting for 40 and 160 min reach 35% and 78% respectively under the same conditions,higher than those of 29% and 76% of the Degussa P25(TiO2).The ability of TiO2/BTs500(BTs500 represents bauxite-tailings calcined at 500 ℃) composites to degrade phenol increases with decreasing pH.
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