The Effect of pH on Electro-Oxidation of Phenolic Compounds at Boron-Doped Nanocrystalline Diamond Films (BDND)

Abstract

The surface properties of boron-doped nanocrystalline diamond (BDND) films were investigated in regard to their electrochemical response to phenol, 4-chlorophenol and 4-nitrophenol. The films were produced using Hot Filament CVD technique on Si substrate with a gas mixture of CH 4 /H 2 /Ar. The morphology and quality of the BDND electrode were characterized by scanning electron microscopy and by Raman scattering spectroscopy. The BDND surface pre-treatment was carried out to evaluate the phenolic compounds detection efficiency induced by anodic polarization (AP) followed by cathodic polarization (CP) in 1 mmol L −1 of these compounds in different pH range from 1 to 13.5. The use of cyclic and linear voltammetry with the BDND electrodes for the detection of these phenolics compounds is described.