Well-defined Fe3O4@MIL-100(Fe) hollow nanoflower heterostructures for selective dection and monitoring of benzoylurea insecticides from food and water.

[Display omitted] • The Fe 3 O 4 @MIL-100(Fe) with hollow nanoflower (HFs) morphology had been synthesized. • The shell thickness of MOF in Fe 3 O 4 @MIL-100(Fe) HFs is controllable. • The Fe 3 O 4 @MIL-100(Fe) HFs composite was used as adsorbent of solid-phase extraction. • The Fe 3 O 4 @MIL-100(Fe) HFs exhibited excellent enrichment performance for BUs. Developing a platform for the selective detection and effective monitor of toxic contaminants is a major challenge to address organic contaminants contamination in environmental science. Here, for the first time, the thickness-controllable Fe 3 O 4 @MIL-100(Fe) heterogeneous materials with special hollow nanoflower (HFs) morphology had been synthesized. The morphology and shell thickness of the nano-petal could be tuned by changing the reaction time. The resultant Fe 3 O 4 @MIL-100(Fe) HFs exhibited the hollow nanoflower shapes and exposed abundant accessible active sites. The enrichment performance of Fe 3 O 4 @MIL-100(Fe) HFs was approximately 1.4–1.7 times that of spherical Fe 3 O 4 @MIL-100(Fe) composite for benzoylurea insecticides (BUs). Furthermore, the optimal sample achieved the wide linearity (0.05–500 ng mL−1) and low limits of detection, (0.003–0.01 ng mL−1) for BUs. The research provides a new strategy for highly sensitive detection and monitoring of harmful pollutant levels in the environment. [ABSTRACT FROM AUTHOR]