二氧化锰纳米微球在电Fenton反应中的应用

通过简单的水热法制备了比表面积较高的MnO₂纳米微球，以之替代Fenton试剂中的Fe试剂，采用类电Fenton反应降解染料亚甲基蓝（MB），研究其处理效果。实验结果表明:当MB溶液初始浓度为30 mg/L时，电压为10.6 V，MnO₂浓度为80 mg/L，H₂O₂浓度为20.4 g/L，保持pH为4条件下，MB在40 min内的降解率达到94.08%。分析了反应前后MnO₂的变化并提出其反应机理。该研究成果可为电Fenton技术的应用提供新的思路和理论依据。

APPLICATION OF MANGANESE DIOXIDE NANOSPHERES IN ELECTRO-FENTON REACTION

In this work, a nano MnO₂ microsphere with high large specific surface area has been successfully prepared by a facile hydrothermal process. Then it was used to replace Fe2+ in Fenton reagent. Methylene blue (MB) was degraded by electro-like Fenton reaction. The experimental results showed that when the initial concentration of methylene blue solution was 30 mg/L, the optimal degradation condition was voltage of 5.3 V, 80 mg/L MnO₂, H₂O₂ solution content of 20.4 g/L, pH of 4. Then the degradation rate of MB reached 94.08% within 40 min.The changes of MnO₂ before and after the reaction were discussed and the reaction mechanism was proposed.This study could provide theoretical basis and guidance for electro-Fenton technology in practical application.