4-氯酚在TiO2纳米膜上光催化降解及反应动力学特征

TiO2/glass film was prepared by a sol gel method with titanium tetrabutoxide as precursor,and used in photocatalytic degradation of 4 Chlorophenol(4 CP)in aqueous solution.The crystal type and size of TiO2 in film prepared in different experimental conditions were characterized by using XRD.The experiments indicated that the TiO2 particles in different film appear regular anatase structure with size about 8 33nm after heating treatment at 500℃ temperature,and the film coated 5 layers of TiO2 sol in the case of higher(pH≥10)and lower pH value(pH≤2) showed a higher catalytic activity.The relationship between initial 4 CP concentration(C0) and reaction rate(r0) follow Langmuir Hinshelwood equation,and the photocatalytic degradation of 4 CP(C0≤07mmol·L-1)can be expressed by first order kinetics.