KINETIC STUDY ON PHOTOELECTROCATALYTIC DEGRADATION OF PHENOL BY USING SUPPORTED TiO_2 AS CATALYST
TiO 2 thin film electrodes were prepared by dip-coating technique. Using the porous nickel based TiO 2 thin film electrode as working electrode, the photoelectrocatalytic system with three kinds of electrodes (working electrode, counter electrode and reference electrode)was built.The effects of pH, initial phenol concentration, quantity of catalyst, intensity of incident light, voltage of electrical bias applied on the photoelectrocatalytic reaction rate of phenol were investigated. The global kinetics was described by an exponential equation derived as C=C 0exp(-0.5430C -0.4241 0E 0.2968 Q 0.5418 I 0.5877 t).The deviation between calculated and experimental results was approximately within 15%.