Metal-organic frameworks with peroxidase-like activity for efficient removal of aflatoxin B1

Abstract

Aflatoxin B₁ (AFB₁), a naturally produced toxin existing in major food crops, is highly toxic and carcinogenic to human and animals. In this study, a reusable material, Pd@PCN-222 with great adsorption performance and peroxidase-like activity was synthesized for the removal of AFB₁. Pd@PCN-222 exhibited great adsorption performance owing to hierarchical porous structure. Pd@PCN-222 also could catalyze the AFB₁ in the presence of H₂O₂ due to the Fe-tetrakis (4-carboxyphenyl) porphyrin and Pd as effective peroxidase active site, which improved the removal efficiency of AFB₁. Pd@PCN-222 was applied for the removal of AFB₁ with a removal rate of 96.52% in 2 h. Owing to the advantages of high removal efficiency and reusability, Pd@PCN-222 had great application potential in AFB₁ removal.

Keywords: Aflatoxin B(1); Degradation; Metal-organic frameworks; Peroxidase-like activity; Removal.