Kinetics of photoelectrocatalytic degradation of humic acid using B2O3•TiO2/Ti photoelectrode

An innovative photoelectrode, B2O3 center dot TiO2/Ti electrode, was prepared by galvanostaticanodisation. The morphology and crystalline texture of the B2O3 center dot TiO2. film on electrode were examined by atomic force microscopy (AFM) and X-ray diffraction respectively. The examination results indicated that the anatase was the dominant component. The kinetics of photoelectrocatalytic(PEC) degradation of humic acid(HA) was investigated; the results demonstrated that effects from strongness to weakness on the photoelectrocatalytic degraded rate of humic acid: power of UV-lamp, area of TiO2, film, bias, original concentration of humic acid solution. The optimum conditions were power of UV-lamp 125 W, area of TiO2 film 42.0 cm(2), bias 1.4 V, original concentration of humic acid solution 5 mg/L in this PEC reaction system.