Preparation and characterization of electrode from annealed nano-diamond particles with boric acid for anodic oxidation process

This work is reported the incorporation of boron on diamond particles by annealing process using boric acid as boron source at different temperatures 700, 900, and 1100 °C. Moreover, the electrodes were prepared from pristine diamond (P-ND) and annealed diamond particles (A-ND). Raman, XRD, and FTIR techniques were used to investigate the effect of doping boron in diamond particles. Analysis of the results showed that the boron doping in diamond particles accord at 1100 °C. Cyclic voltammeter and impedance techniques were used to characterize the diamond anode properties after (P-ND) and before (A-ND) annealing treatment. A-ND electrode demonstrated high oxidation power which is suitable for anodic oxidation process. Moreover, reactivity of A-ND anode was higher than that of P-ND anode as a consequence of the presence of boron in the diamond particles of A-ND electrode. 2-chlorophenol was selected as pollutant to investigate the performance of A-ND anode for electro-degradation treatment. The result shows the removal rate of 2-chlorophenol attained 98% after 6 h.