ZnO/ZnFe2O4/zeolite composite catalyst for peroxymonosulfate oxidation and photocatalysis

Magnetic ZnO/ZnFe2O4/Zeolite (ZFZ) catalysts were prepared by a solvothermal-microwave method and used for advanced oxidation processes. Careful investigations indicate ZFZ has a core-shell structure with ZnO/ ZnFe2O4 nanoparticles covered on the surface of Na-A zeolite. The specific saturation magnetization of ZFZ is up to 15.276 emu/g, which is sufficient for efficient magnetic separation. Experiments on advanced oxidation degradation of Rhodamine B indicate that ZFZ have remarkable catalytic activity for peroxymonosulfate oxidation. The degradation rate increased more than 3 times under UV-light irradiation, suggesting that ZFZ has stronger photocatalysis. The highest decomposition rate could reach 98.55 %. And after 5 cycles, a 79.11 % degradation rate still remained.

Automated summary

Magnetic ZnO/ZnFe2O4/Zeolite (ZFZ) catalysts were synthesized using a solvothermal-microwave method and applied in advanced oxidation processes. The core-shell structured ZFZ with ZnO/ZnFe2O4 nanoparticles on Na-A zeolite surface exhibited a specific saturation magnetization of 15.276 emu/g, enabling efficient magnetic separation. The catalyst showed remarkable catalytic activity for peroxymonosulfate oxidation, with a degradation rate increasing more than 3 times under UV-light irradiation. The highest decomposition rate reached 98.55%, and 79.11% degradation rate remained after 5 cycles.