Efficient magnetically separable heterogeneous platinum catalyst bearing imidazolyl schiff base ligands for hydrosilylation

•A magnetically separable heterogeneous nano catalyst Fe3O4@SiO2-biIMI- PtCl2 was prepared.•This catalyst can mediate the hydrosilylation between 1-Octene and hydrosilane with a conversion% up to 99% and only beta adduct formed.•This catalyst shows good activity towards various substrates.•This catalyst can be reused for over 5 times without any lost in activity.