Zhen He,Chen Yu,Jiaming Liu,Zengcheng Miao,Yuxin Wang
Sb-doped SnO2(SnO2-Sb) coatings show superiority in degrading toxic and refractory organic pollutants. SnO2-Sb coatings can be prepared by oxidizing electrodeposited Sn-Sb coatings through an annealing process. The properties and structure of SnO2-Sb coatings can be tailored by adjusting the preparation parameters. This study examines the effects of crucial preparation parameters on the performance of SnO2-Sb coatings, with the aim of enhancing their properties.Determining the coatings’ cross-sectional and surface characteristics was accomplished using various characterization techniques. A thorough investigation of the prepared samples’ phase and element components was also carried out. Based on the findings, the surface roughness of the prepared Sn-Sb precoating changed with increasing current density, yet the primary surface features of the SnO2-Sb coatings were hardly altered by the annealing process. Without lowering the coating thickness, the appropriate current density of 30 mA/cm2produced a rough and active coating surface. Our study’s proper annealing temperature of 600 °C transformed Sn-Sb precoating into SnO2-Sb coating and achieved excellent coating quality.While changes in the Sb content affected the morphology of the prepared SnO2-Sb coatings, the mixed oxide coatings’ cassiterite SnO2phase was unaffected. These results may provide insights into the optimized use of SnO2-Sb coatings in various applications.Keywords:SnO2-Sb;electrodeposition;structures
Yongyang Chen,Fulin Li,Xiaochun Dong,Dan Guo,Yixuan Huang,Shanping Li
Efficient and stable rGO@Ti/SnO 2 –Sb composite electrodes were prepared by the sol-gel method. The microscopic morphology , crystal structure, and electrochemical properties of the rGO@Ti/SnO 2 -Sb composite electrodes were characterized by a range of characterization techniques. The electrocatalytic oxidation activity of the electrodes was evaluated by the degradation efficiency of the fluoroquinolone antibiotic norfloxacin (NOR). Simultaneously, the effects of different experimental conditions on the degradation efficiency of NOR were also investigated, such as calcination temperatures, brushing times, initial pH, initial electrolyte concentration , etc. The enhanced electrocatalytic oxidation activity can be attributed to the excellent electron transfer efficiency, higher electrode specific surface area, and stronger adhesion of the electrode coating to the substrate. Additionally, the possible NOR degradation pathway was deduced through the main intermediates, and the mechanism of NOR degradation was discussed based on experimental and characterization results. This work provides a simple and effective method to prepare highly active composite electrodes for electrocatalytic oxidation to remove organic pollutants from water.
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