A novel Prussian blue‐magnetite composite synthesized by self‐template method and its application in reduction of hydrogen peroxide

Abstract

A novel Prussian blue (PB)‐Fe 3 O 4 composite has been prepared for the first time by self‐template method using PB as the precursor. According to this method, Fe 3 O 4 nanoparticles distributed uniformly on the surface of PB cube. The feed ratio of sodium acetate to PB has been proved to be a key factor for magnetic properties and electro‐catalysis properties of the composite. Under the experimental conditions, the saturation magnetization value ( Ms ) of PB‐Fe 3 O 4 –2 composite was 22 emug −1 , while the Ms value of other samples reduced. The composites also showed a good peroxidase‐like activity for the oxidation of substrate 3,3,5,5‐tetramethylbenzidine (TMB) in the presence of H 2 O 2 . The catalytic reduction of hydrogen peroxide capacity was PB‐Fe 3 O 4 –1> PB‐Fe 3 O 4 –2> PB‐Fe 3 O 4 –3> PB‐Fe 3 O 4 –0, which confirmed the Fe(II) centres in PB surface and Fe 3 O 4 nanoparticles had synergistic effect on catalytic reduction of hydrogen peroxide.