GO/CoFe2O4催化过硫酸盐降解邻苯二甲酸二丁酯效能

Efficiency of dibutyl phthalate degradation by GO/CoFe2O4 catalytic oxidation of peroxymonosulfate

摘要:

为高效地去除水中环境激素类污染物, 采用共沉淀法合成了氧化石墨烯负载钴尖晶石铁氧体(GO/CoFe₂O₄)催化剂, 催化过硫酸盐(PMS)去除水中邻苯二甲酸二丁酯(DBP).采用SEM、TEM、XPS、XRD对催化剂进行表征, 研究不同条件下催化PMS去除水中DBP的效果, 提出催化PMS反应机理.结果表明, GO/CoFe₂O₄为颗粒状尖晶石结构, 室温下, DBP初始浓度为2 μmol/L、催化剂投量为0.1 g/L、PMS浓度为20 μmol/L、pH为7时, GO/CoFe₂O₄催化PMS体系对DBP的去除率可达89%, 使用5次后催化效果仅降低5%.该新型复合催化剂高效、具有磁性、方便回收, 具有良好的工程应用前景.

Abstract:

GO/CoFe₂O₄ was synthesized by coprecipitation to remove the environmental pollutants efficiently in the water. Dibutyl phthalate (DBP) was removed using the GO/CoFe₂O₄-catalyzed peroxymonosulfate (PMS). GO/CoFe₂O₄ was characterized by SEM, TEM, XPS and XRD. DBP removal efficiency was studied under different conditions in the water. The results showed that, at room temperature, the removal rate of DBP in the anometer spinel granulated GO/CoFe₂O₄/PMS oxidation reaction system, with the initial DBP concentration of 2 μmol/L, catalysts dosage of 0.1 g/L, PMS concentration of 20 μmol/L and pH of 7.0. The removal efficiency of DBP only decreased 5% after 5 times. The new composite catalyst had a potential engineering application prospect due to its high efficiency and easy recovery.