Construction of a novel magnetic metal–organic framework fluorescent sensor for selective detection and magnetic separation of 4-nitrophenol

The Fe 3 O 4 @SiO 2 @MOF can detect the concentration of 4-nitrophenol within 30 s, and has a good linear relationship with 4-nitrophenol in the concentration range of 5–200 μM ( R 2 = 0.9946), and the detection limit is 2.2 μM (S/N = 3).