Castro Raíra Souza de Santana, Dória Aline Resende, Costa Fabio, Mattedi Silvana, Eguiluz Katlin Ivon Barrios, Salazar-Banda Giancarlo Richard
Graduate Program in Processes Engineering (PEP), University Tiradentes, Aracaju, SE, Brazil.
Electrochemistry and Nanotechnology Laboratory, Institute of Technology and Research (ITP), Aracaju, SE, Brazil.
Environ Sci Pollut Res Int. 2025 Apr;32(16):10505-10518. doi: 10.1007/s11356-023-29742-9. Epub 2023 Sep 18.
The development of technologies capable of producing efficient and economically viable anodes is essential for the electrochemical treatment of water contaminated with complex organic pollutants. In this context, the use of ionic liquids as solvents to prepare mixed metal oxide (MMO) anodes has proven to be an up-and-coming alternative. Here, we analyze the influence of the temperature of calcination (300, 350, and 400 ºC) on the production of Ti(RuO)-(SbO) anodes made using the thermal decomposition method using three ionic liquids (IL) as solvents: dipropyl ammonium acetate (DPA-Ac), dipropyl ammonium propionate (DPA-Pr), and dipropyl ammonium butyrate (DPA-Bu). The decomposition temperature for all IL, accessed by thermogravimetry, is below 200 ºC. Physical and electrochemical analyses demonstrate that the calcination temperature of the anodes is decisive for their durability and electrochemical properties. Anodes prepared with DPA-Bu at 350 ºC show higher stability (around 35 h) than those made with other ILs at temperatures of 300 and 400 ºC and improved results in terms of 4-NP mineralization, where 97% of TOC removal was achieved in 120 min. It could be verified that the calcination temperature and IL employed had a decisive influence on the characteristics of the presented anodes. Therefore, the anode prepared with DPA-Bu at 350 ºC is promising for application in the degradation of organic compounds.
开发能够生产高效且经济可行的阳极的技术对于电化学处理受复杂有机污染物污染的水至关重要。在这种背景下，使用离子液体作为溶剂来制备混合金属氧化物（MMO）阳极已被证明是一种有前途的替代方法。在此，我们分析了煅烧温度（300、350和400℃）对使用三种离子液体（IL）作为溶剂通过热分解法制备的Ti(RuO)-(SbO)阳极生产的影响：二丙基醋酸铵（DPA-Ac）、二丙基丙酸铵（DPA-Pr）和二丙基丁酸铵（DPA-Bu）。通过热重分析法测得的所有IL的分解温度均低于200℃。物理和电化学分析表明，阳极的煅烧温度对其耐久性和电化学性能起决定性作用。在350℃下用DPA-Bu制备的阳极比在300℃和400℃下用其他IL制备的阳极表现出更高的稳定性（约35小时），并且在4-NP矿化方面有更好的结果，在120分钟内实现了97%的总有机碳去除率。可以证实，煅烧温度和所使用的IL对所呈现阳极的特性具有决定性影响。因此，在350℃下用DPA-Bu制备的阳极在有机化合物降解应用方面具有前景。
