锆掺杂磁性沸石的制备及其催化降解甲基橙性能研究

Preparation of Zirconium-Doped Magnetic Zeolites and Study on Its Catalytic Degradation Performance of Methyl Orange

摘要: 本研究采用高能球磨法制备了锆掺杂磁性沸石(ZFZ)，并将其用于催化过一硫酸盐(PMS)降解甲基橙(MO)染料溶液。通过进行不同的反应体系，不同氧化剂用量、催化剂用量、pH值、循环实验和自由基淬灭实验来评估ZFZ的催化性能。实验结果表明：在催化剂添加量为0.15 g/L、PMS添加量为1.5 mmol/L、pH为9时，催化效果最好可达到75.18%。经过5次循环实验，MO的降解率仍能保持在70%以上，表明催化剂具有良好的循环稳定性。自由基淬灭实验结果表明$O_2^{·-}$ 和¹O₂在MO的催化降解过程中起主要作用。

Abstract: Zirconium-doped magnetic zeolite (ZFZ) was prepared by high-energy ball grinding method and used to catalyze the degradation of methyl orange (MO) dye solution by peroxymonosulfate (PMS). The catalytic performance of ZFZ was evaluated by performing different reaction systems, different amounts of oxidants, catalyst, pH, cycle experiments and free radical quenching experiments. The experimental results show that the best catalytic effect can reach 75.18% when the catalyst addition amount is 0.15 g/L, PMS addition amount is 1.5 mmol/L, and pH is 9. After 5 cycles, the degradation rate of MO remained above 70%, indicating a good cycle stability of the catalyst. The results of radical quenching experiments indicate that $O_2^{·-}$ and ¹O₂ play a major role in the catalytic degradation of MO.