Enhancement of catalytic performance by regulating the surface properties of Fe3O4 composites

As magnetic catalyst material, great studies have been made to improve the catalytic performance of Fe 3 O 4 nanoparticles by changing the structure, but little attention has been paid to the relationship between the surface properties (the electronegativity, electron transport capacity) and the catalytic performance of Fe 3 O 4 nanoparticles. Therefore, this work was devoted to the investigation of the relationship by loading Fe 3 O 4 nanoparticles on graphene oxide(GO) grafted with N,N,N',N'-Tetrakis (2-hydroxyethy)ethylenediamine (THEED), which was denoted as TG@Fe 3 O 4 . N atoms in THEED and GO have strong electronegativity and electron mobility respectively, which greatly change the surface properties of the Fe 3 O 4 composite. A large number of characterization methods have proved that the original structure of the produced Fe 3 O 4 nanoparticles has not been changed, and the Zeta potential and cyclic voltammetry curves confirmed that the surface properties of Fe 3 O 4 composite have been improved. In the Fenton degradation experiment of MB, TG@Fe 3 O 4 can make the degradation rate of MB reach 100% in 8 min, which verified that the strong electronegativity and electron transport capacity were beneficial to the improvement of the catalytic performance of Fe 3 O 4 composite.