Preparation and Electrochemical Properties of TiO2/BDD Composite Film Materials

Abstract

Boron-doped diamond (BDD) has important applications in the catalytic degradation of wastewater. In this paper, the TiO2 was electro-phoretically deposited onto the silicon-based BDD film by anelectrophoretic deposition method using a butyl titanate (TBOT) as the titanium source. The effect of the deposition time on the electrochemical properties of the TiO2/BDD composites was investigated. The phase and morphology were characterized by X-ray diffraction, laser Raman spectroscopy, and scanning electron microscopy. The electrical and electrochemical properties were characterized by Hall measurement system and electrochemical analyzer. The results showed that the performance of TiO2/BDD composites was significantly higher than that of single BDD electrode materials. The morphology of TiO2 films obtained by TiO2 deposition three times was better.The Hall mobility of most samples has been improved, and the Hall mobility of sample 4 increased to 213 cm2/V·s, which is 3.5 times of the single BDD materials. The electrochemical potential window of sample 4 in alkaline, acidic and neutral electrolyte are 4.6 V, 4.3 V, 4.6 V.