Journal of Water Process Engineering   2016 年 13 卷

2016.10.01

Electrolysis is widely adopted in water treatment. The major challenge of electrolysis technology focuses on developing better electrode materials. In this study, we reported that the hydrothermal coating of titanium electrode with carbon (C-Ti electrode) could significantly improve the decoloration performance of Ti electrode. The decoloration kinetics of C-Ti electrode was much faster than that of naked Ti electrode at the same current density. The presence of chloride electrolytes, e.g. NaCl and KCl, was crucial for the efficient electrolysis. The optimized pH for C-Ti electrode was pH 7. Beyond methylene blue, C-Ti electrode showed high decoloration performance for other dyes, such as congo red, acidic blue 92 and remazol brilliant blue R. Mechanistically, the electrolytic oxidation of MB was mainly via indirect pathway, where Cl