Construction of a controllable and dispersed Fe3O4-based catalyst using ZIFs as a spatial support for highly catalytic degradation of aflatoxin B1

A Fe3O4-based catalyst with controllable properties and good dispersity was constructed utilizing zeolitic imidazolate frameworks (ZIFs) as a spatial support. Fe3O4 was attached onto the ZIFs surface via a facile strategy and the resulting Fe3O4/ZIFs material was applied as peroxymonosulfate catalyst for highly effective aflatoxin B-1 (AFB(1)) degradation. The AFB(1) degradation efficiency can be regulated by controlling the surface area and pore distribution of Fe3O4/ZIFs. Fe3O4/ZIFs (1:8) exhibited good catalytic ability within a wide pH range (3-8). A degradation efficiency of 97.4 % was achieved within 30 min, with 80.3 % degraded within the first 5 min, which was attributed to the ZIFs support structure, effectively improving the dispersity and mass transfer efficiency of Fe3O4. O(2)(.-)and O-1(2) were the dominant active species in AFB1 degradation. Subsequently, the AFB(1) degradation pathway was proposed. This study provides a promising and novel approach to the enhancement of catalytic activity for efficient AFB(1) degradation.