Construction of carbon-doped iron-based nanozyme for efficient adsorption and degradation to synergistic removal of aflatoxin B1

The multifunctional composites Fe 3 O 4 /GO/NH 2 -MIL-53(Fe) with excellent adsorption-degradation performance was prepared for the removal of Aflatoxin B 1 (AFB 1 ). The adsorption function of Fe 3 O 4 /GO/NH 2 -MIL-53(Fe) was based on the large specific surface area and abundant adsorption sites. The degradation function of Fe 3 O 4 /GO/NH 2 -MIL-53(Fe) was based on the activation of H 2 O 2 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 ( 1 O 2 ). 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 AFB 1 . Construction of Fe 3 O 4 /GO/NH 2 -MIL-53(Fe) as the carbon-doped iron-based nanozyme provided novel approaches of the removal for risks control of AFB 1 . Accompanied by the AFB 1 adsorption, the advanced oxidation of nanozyme to the AFB 1 degradation provided a promising way for the synergistic removal of AFB 1 .