Electrochemical Properties of Boron-Doped Diamond Thin Film Synthesized by MPCVD on Titanium Substrate to Use as an Ozone Generator

Abstract

Boron doped diamond is an excellent electrode material with a large potential window in aqueous solution and low background current. The wider potential window and lower background currents make the BDD material very attractive for electrochemical analysis experiments.Furthermore, BDD exhibits high chemical and electrochemical stability, which makes the material a suitable electrode material for various applications such as bioelectrochemical applications and water disinfection.In this paper, we had succeeded to generate ozone by using the BDD electrode with high efficiency compared to traditional lead oxide (PbO2) and other BDD electrods.Firstly, a Titanium substrate had been seeded by ultra sonic agitation with diamond powder(30nm ~ 40nm) for an hour, which was used as a nucleation of diamond. After that BDD film was deposited on the substrate by microwave plasma chemical vapor deposition.The morphology of samples was observed by Scanning Electron Microscopy (SEM) and the structural-chemical properties of synthesized diamond layer was investigated by Raman Spectroscopy. Conductivity, carrier concentration and Hall mobility was then determined by a Hall-effect measurement unit, based on the van der Pauw method. The ozone concentration in water, which was measured by Ozone Colorimeter.