Abstract:
In this paper, nano TiO
2 are grown on the surface of boron-doped diamond (BDD) film using a hydrothermal method, thus fabricating a TiO
2/BDD composite electrode with photoelectric co-catalysis function. The electrochemical property of the electrode is characterized by a electrochemical workstation, and then the electrodes are used to degrade the pharmaceutical wastewater. Results show that the electrode has a wide electrochemical potential, which is 3 V, 4 V and 4 V in acidic, neutral and alkaline conditions, respectively. It also has an anodic oxidation potential of 2 V with low background current and good reversibility. The composite electrode has remarkable degrading effect on the wastewater by reducing the chemical oxygen demand from 7339 mg/L to 19 mg/L in 630 min, which means a 99.7% reduction.