High electrochemical activity of a Ti/SnO2–Sb electrode electrodeposited using deep eutectic solvent. (January 2020)

• Record Type: Journal Article
• Authors: Sun, Yi; Cheng, Shaoan; Mao, Zhengzhong; Lin, Zhufan; Ren, Xiangrong; Yu, Zhen
• Is Part Of: Chemosphere. Volume 239(2020)
• Publication Date: 2020-01
• Subjects: Deep eutectic solvent -- Electrodeposition -- Sb doped SnO2 -- Electrochemical oxidation; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2019.124715
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract: Electrodeposition is an economical and efficient way to prepare Ti/SnO2 –Sb electrode for electrochemical oxidizing pollutants in wastewater. The solvent used for electrodeposition has a great effect on electrode performance. The conventional Ti/SnO2 –Sb electrode electrodeposited using aqueous solvent has poor electrochemical activity and short service life. In this study, a Ti/SnO2 –Sb electrode was prepared via electrodeposition using a deep eutectic solvent (DES). This new Ti/SnO2 –Sb-DES electrode performed a rate constant of 0.571 h −1 for methylene blue decolorization and long accelerated service life of 12.9 h (100 mA cm −2 ; 0.5 M H2 SO4 ), which were 1.7 times and 3.2 times as high as that of the electrode prepared in aqueous solvent, respectively. The enhanced properties were related to the 1.3 times increased electrochemically active surface area of Ti/SnO2 –Sb-DES electrode which had a rough, multilayer and uniform surface structure packed with nano-sized coating particles. In conclusion, this study developed a facile, green and efficient pathway to prepare Ti/SnO2 –Sb electrode with high performance. Highlights: A Ti/SnO2 –Sb electrode was prepared using deep eutectic solvent (DES). Ti/SnO2 –Sb-DES electrode showed a rough surface with high electrochemical activity. Rate constant for methylene blue degradation of Ti/SnO2 –Sb-DES increased by 70%. Accelerated service life of Ti/SnO2 –Sb-DES increased by 2.2 times.