School of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China.
Molecules. 2023 Feb 27;28(5):2189. doi: 10.3390/molecules28052189.
Electrocatalytic oxidation (ECO) has attracted attention because of its high efficiency and environmental friendliness in water treatment. The preparation of anodes with high catalytic activity and long service lifetimes is a core part of electrocatalytic oxidation technology. Here, porous Ti/RuO-IrO@Pt, Ti/RuO-TiO@Pt, and Ti/YO-RuO-TiO@Pt anodes were fabricated by means of modified micro-emulsion and vacuum impregnation methods with high porosity titanium plates as substrates. The scanning electron microscopy (SEM) images showed that RuO-IrO@Pt, RuO-TiO@Pt, and YO-RuO-TiO@Pt nanoparticles were coated on the inner surface of the as-prepared anodes to form the active layer. Electrochemical analysis revealed that the high porosity substrate could result in a large electrochemically active area, and a long service life (60 h at 2 A cm current density, 1 mol L HSO as the electrolyte, and 40 °C). The degradation experiments conducted on tetracycline hydrochloride (TC) showed that the porous Ti/YO-RuO-TiO@Pt had the highest degradation efficiency for tetracycline, reaching 100% removal in 10 min with the lowest energy consumption of 167 kWh kg TOC. The reaction was consistent with the pseudo-primary kinetics results with a k value of 0.5480 mol L s, which was 16 times higher than that of the commercial Ti/RuO-IrO electrode. The fluorospectrophotometry studies verified that the degradation and mineralization of tetracycline were mainly ascribed to the •OH generated in the electrocatalytic oxidation process. This study thus presents a series of alternative anodes for future industrial wastewater treatment.
电催化氧化（ECO）因其在水处理中的高效和环境友好性而受到关注。制备具有高催化活性和长使用寿命的阳极是电催化氧化技术的核心部分。在这里，通过改进的微乳液法和真空浸渍法，以高孔隙率钛板为基底，制备了多孔 Ti/RuO-IrO@Pt、Ti/RuO-TiO@Pt 和 Ti/YO-RuO-TiO@Pt 阳极。扫描电子显微镜（SEM）图像表明，RuO-IrO@Pt、RuO-TiO@Pt 和 YO-RuO-TiO@Pt 纳米颗粒涂覆在制备的阳极的内表面上，形成了活性层。电化学分析表明，高孔隙率基底可导致大的电化学活性面积和长的使用寿命（在 2 A cm 电流密度、1 mol L HSO 作为电解质和 40°C 的条件下 60 小时）。对盐酸四环素（TC）的降解实验表明，多孔 Ti/YO-RuO-TiO@Pt 对四环素具有最高的降解效率，在 10 分钟内达到 100%去除，能量消耗最低为 167 kWh kg TOC。反应与拟一级动力学结果一致，k 值为 0.5480 mol L s，是商业 Ti/RuO-IrO 电极的 16 倍。荧光分光光度法研究证实，四环素的降解和矿化主要归因于电催化氧化过程中生成的•OH。因此，本研究为未来工业废水处理提供了一系列替代阳极。
