Oil component removal performance of boron-doped diamond electrode prepared by hot-filament chemical vapor deposition method

Abstract

The sewage and wastewater treatment market is evolving from organic material removal to advanced treatment and reuse, including toxic management and non-degradable treatment systems. Consequently, the importance of insoluble electrode technology for oxidant generation, which primarily degrades hazardous materials, is increasing. In this study, we propose boron-doped diamond (BDD) as an electrode material for an oil component removal system. BDD electrodes were prepared with various methane (CH4) and trimethyl borane (TMB) flow ratios using hot-filament chemical vapor deposition (HF-CVD) system. All samples exhibited a preferential (111) peak growth; however, there was no significant difference in crystallinity concerning different boron concentration. In cyclic voltammetry analysis, all samples had a potential window of 2.6 V, but the current increased as a function of boron concentration; BDD with 47,000 ppm exhibited 1.3 times higher current than BDD with 6,700 ppm. As a result, the BDD 47,000 ppm sample, which generated an extremely high concentration of oxidants, showed the best performance in the oil residue component removal test.