摘要：

采用水热法制备了Ag₂O/Ag₂MoO₄复合催化剂，并对其进行表征。成功构建了Ag₂O/Ag₂MoO₄-H₂O₂催化体系降解有机染料孔雀石绿（MG）。实验结果表明，在催化剂投加量为0.5 g/L，H₂O₂浓度为50 mmol/L，溶液初始pH为4.5，反应温度为25℃，MG质量浓度为30 mg/L的最佳反应条件下，催化体系对MG的催化降解率高达99.8%。所制备的Ag₂O/Ag₂MoO₄催化剂能在较宽的pH范围内（2.5~6.5）保持很好的催化活性，且催化剂具有优异的稳定性，经过5次重复使用后，MG的降解率仍可达到93%以上。

关键词: Ag₂O/Ag₂MoO₄, 高级氧化, 孔雀石绿, 降解

Abstract:

A composite catalyst Ag₂O/Ag₂MoO₄ was prepared by hydrothermal synthesis method and characterized. A catalyst system of Ag₂O/Ag₂MoO₄-H₂O₂ for degradation malachite green(MG) was constructed successfully. The experimental results showed that degradation ratio of MG reached 99.8% with Ag₂O/Ag₂MoO₄-H₂O₂ system under optimal experimental conditions(catalyst dosage 0.5 g/L, H₂O₂ concentration 50 mmol/L, pH 4.5 and 250℃). Moreover, the catalytic activity of catalyst could still be excellent over a wide pH range from 2.5 to 6.5 in Ag₂O/Ag₂MoO₄-H₂O₂ system. In addition, the catalysts maintained excellent stable catalytic performance after five cycling runs, and the degradation ratio of MG was still above 93%.

Key words: Ag₂O/Ag₂MoO₄, advanced oxidation, malachite green, degradation

中图分类号: 

• X703.1