The multifunctional composites Fe₃O₄/GO/NH₂-MIL-53(Fe) with excellent adsorption-degradation performance was prepared for the removal of Aflatoxin B₁ (AFB₁). The adsorption function of Fe₃O₄/GO/NH₂-MIL-53(Fe) was based on the large specific surface area and abundant adsorption sites. The degradation function of Fe₃O₄/GO/NH₂-MIL-53(Fe) was based on the activation of H₂O₂ by the catalytic active center formed by the coordination of metal ions and oxygen-containing groups in the system, resulting in hydroxyl radicals (·OH), superoxide anion radicals (O^2-) and singlet oxygen (¹O₂). The adsorption of nanozyme accelerated the degradation reaction process, and the adsorption site was further exposed as the degradation process progressed. The synergistic effect realized the efficient removal of AFB₁. Construction of Fe₃O₄/GO/NH₂-MIL-53(Fe) as the carbon-doped iron-based nanozyme provided novel approaches of the removal for risks control of AFB₁. Accompanied by the AFB₁ adsorption, the advanced oxidation of nanozyme to the AFB₁ degradation provided a promising way for the synergistic removal of AFB₁.

Keywords: Aflatoxin B(1); Iron-metal centers; Nanozyme; Oxygenated functional groups; Synergistic removal.

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