Electrochemistry and Nanotechnology Laboratory, Institute of Technology and Research (ITP), Aracaju, SE, Brazil.
Postgraduate Program in Process Engineering (PEP), Tiradentes University, Aracaju, SE, Brazil.
Environ Sci Pollut Res Int. 2021 May;28(19):23634-23646. doi: 10.1007/s11356-020-10451-6. Epub 2020 Aug 18.
In this study, binary and ternary mixed metal oxide anodes of Ti/RuO-SbO and Ti/RuO-SbO-TiO were prepared using two different heating methods: conventional furnace and alternative CO laser heating. The produced anodes were physically and electrochemically characterized by using different techniques. The main difference found in the laser-made anodes was their more compact morphology, without the common deep cracks found in anodes made by typical thermal decomposition, which showed an important correlation with the prolonged accelerated service life. The correlation between the physicochemical properties of the anodes with their performance towards the 4-nitrophenol oxidations is discussed. The results demonstrated that the ternary anode (Ti/RuO-SbO-TiO) is very promising, presenting a kinetic 5.7 times faster than the respective binary anode and the highest removal efficiency when compared with conventionally made anodes. Also, the lowest energy consumption per unit of mass of contaminant removed is seen for the laser-made Ti/RuO-SbO-TiO anode, which evidences the excellent cost-benefit of this anode material. Finally, some by-products were identified, and a degradation route is proposed. Graphical abstract.
在这项研究中，使用两种不同的加热方法：传统炉和交替 CO 激光加热，制备了 Ti/RuO-SbO 和 Ti/RuO-SbO-TiO 二元和三元混合金属氧化物阳极。通过使用不同的技术对制备的阳极进行了物理和电化学特性分析。在激光制备的阳极中发现的主要区别是其更紧凑的形态，没有典型热分解制备的阳极中常见的深裂纹，这与延长加速使用寿命有重要的相关性。讨论了阳极的物理化学性质与其对 4-硝基苯酚氧化性能之间的相关性。结果表明，三元阳极（Ti/RuO-SbO-TiO）非常有前景，其动力学速度比相应的二元阳极快 5.7 倍，与传统制备的阳极相比，去除效率最高。此外，对于激光制备的 Ti/RuO-SbO-TiO 阳极，去除单位质量污染物的能耗最低，这证明了这种阳极材料具有优异的成本效益。最后，鉴定了一些副产物，并提出了降解途径。
