科研之友
微信
新浪微博
Facebook
分享链接
摘要
In this study, iron-modified montmorillonite (Fe-Mt) was used to prepare the particle electrode, and its catalytic performance in three-dimensional electrode system was systematically investigated. The morphology and phase characteristics of Fe-Mt particle electrode were characterized by SEM-EDS and XRD, respectively, and the effects of different reaction conditions (pH, particle electrode dosage and cell voltage etc.) on the removal efficiency of methylene blue were analyzed. Furthermore, the mechanism of methylene blue oxidative removal by Fe-Mt particle electrode was discussed through free radical scavenging experiments, H2O2 production amount and total soluble iron ion concentration detection. The results showed that the Fe-Mt particle electrode can broaden the effective range of pH, and the removal efficiency of methylene blue increased by about 25% compared with the two-dimensional electrochemical system at pH 3.0, voltage of 5 V and particle electrode dosage of 10 g?L?1. The Fe-Mt particle electrode can directly or indirectly catalyze H2O2 to generate hydroxyl radicals, and combined with the coupling mechanism of adsorption-oxidative degradation to enhance the methylene blue removal efficiency. This study can provide a reference for broadening the application of montmorillonite-based catalytic materials in advanced oxidation systems.
- 单位
