Green construction of magnetic MnFe2O4/ZIF-8 nanocomposite utilizing extract of Melissa officinalis plant for the photo-degradation of tetracycline under UV illumination

Abstract

The current work explores the photocatalytic degradation of tetracycline utilizing ZIF-8 grafted with MnFe2O4 through a facile green approach. The complete degradation was achieved at optimized circumstances (pH = 9, catalyst concentration = 0.5 g/L, contact time = 180 min, and 20 mg/L of tetracycline dose). The photocatalytic decontamination reaction of the as-made catalyst was more adherence to the pseudo-first-order model. Recycling experiments demonstrated the excellent stability of the MnFe2O4/ZIF-8 composite after six regeneration runs. Furthermore, the as-constructed composite can simultaneously eliminate tetracycline, COD, and TOC from real wastewater by 84%, 65%, and 50%, respectively, revealing its robust potential in addressing water contamination concerns.

Keywords

• Green synthesis
• Photocatalytic oxidation
• Tetracycline
• Kinetic
• MnFe2O4/ZIF-8 magnetic nanocomposite