钛基体Ti₄O₇ 阳极在高盐体系下的电催化降解性能

There are some difficult problems in the treatment of high salt wastewater, such as complex composition and poor biodegradability. In this paper, a new titanium-based titanium sub-oxide electrode (denoted as Ti₄O₄ electrode) was prepared by plasma spraying technology. The performance of the electrode was comprehensively evaluated, with the further explanation of the electrode failure mechanism. It was also applied to the electrocatalytic degradation of organic substances in high-salt condition to study the influence of different factors on the degradation effect. The results show that Ti₄O₄ electrode had rich pore structure, high oxygen evolution overpotential, excellent conductivity and good stability. Under high-salt conditions, the increase of current density improved the degradation of acid red G, but significantly increased the specific energy consumption. Benefited from the stability of titanium oxide electrode, the salt content and pH had little influence on the degradation effect. When the current density was 15 mA/cm², the salt content was 1% and the initial pH value was 8.5, the decolorization rate was 99.91% and the COD removal rate was 71.88% within 120 minutes. The findings show that Ti₄O₄ electrode has a good application prospect in the field of electrochemical wastewater treatment.