摘要：

采用研磨-焙烧工艺制备了CuFe₂O₄/g-C₃N₄复合催化剂，并在可见光下进行了CuFe₂O₄/g-C₃N₄非均相光Fenton体系降解水中罗丹明B（RhB）的研究。结果表明，当复合催化剂CuFe₂O₄掺杂量为50%，复合催化剂投加量为1 g/L，H₂O₂浓度为10 mmol/L，pH=7，温度为20℃（室温）时，RhB去除率可达92.3%，反应活化能为9.97 kJ/mol。自由基猝灭实验证明，·OH和h⁺是起主要降解作用的活性物种。循环实验证实，CuFe₂O₄/g-C₃N₄具有良好的稳定性。天然日光驱动下该体系对高浓度RhB废水（800 mg/L）的脱色率和COD去除率分别可达100%和90.52%。

关键词: 高级氧化, 非均相光Fenton, 天然日光, CuFe₂O₄/g-C₃N₄, 罗丹明B

Abstract:

A composite catalyst of CuFe₂O₄/g-C₃N₄ was prepared by grinding-roasting method, and its catalytic performance for photo-Fenton was tested with rhodamine B(RhB) under visible light. The results showed that the removal rate of RhB could reach 92.3% and the activation energy was 9.97 kJ/mol with the condition of CuFe₂O₄ content of composite catalyst 50%, the dosage of composite catalyst 1 g/L, the concentration of H₂O₂ 10 mmol/L, pH=7 and the temperature 20℃(room temperature). The results of free radical scavenge experiments showed that both ·OH and h⁺ played an important role in the degradation reaction. It was confirmed that CuFe₂O₄/g-C₃N₄ had good stability by cycling experiment. Under the action of natural sunlight, the decolorization rate and COD removal rate of high concentration RhB wastewater(800 mg/L) could reach 100% and 90.52%, respectively.

Key words: AOP, heterogeneous photo-Fenton, solar light, CuFe₂O₄/g-C₃N₄, RhB

中图分类号: 

• X703