Electrochemical oxidation of reactive brilliant orange X-GN dye on boron-doped diamond anode

In this study, the electrochemical oxidation of reactive brilliant orange X-GN dye with a boron-doped diamond (BDD) anode was investigated. The BDD electrodes were deposited on the niobium (Nb) substrates by the hot filament chemical vapor deposition method. The effects of processing parameters, such as film thickness, current density, supporting electrolyte concentration, initial solution pH, solution temperature, and initial dye concentration, were evaluated following the variation in the degradation efficiency. The microstructure and the electrochemical property of BDD were characterized by scanning electron microscopy, Raman spectroscopy, and electrochemical workstation; and the degradation of X-GN was estimated using UV-Vis spectrophotometry. Further, the results indicated that the film thickness of BDD had a significant impact on the electrolysis of X-GN. After 3 h of treatment, 100% color and 63.2% total organic carbon removal was achieved under optimized experimental conditions: current density of 100 mA/cm(2), supporting electrolyte concentration of 0.05 mol/L, initial solution pH 3.08, and solution temperature of 60 A degrees C.