Immobilization of Phosphomolybdate Anions on the Surface of Magnetite Nanoparticles Modified with Quaternary Phosphonium Cations

Abstract

A new hybrid nanomaterial was developed by immobilization of phosphomolybdate anions on the surface of modified magnetite nanoparticles with quaternary phosphonium cations. Silica coated magnetic nanoparticles supported phosphonium cations, Ph3P+-SCMNPs, were prepared by covalent attachment of chloropropylsilyl groups on the surface of silica coated magnetite nanoparticles and next reaction with triphenylphosphine. Then, reaction of the prepared Ph3P+-SCMNPs nanomaterial with H3PMo12O40 resulted in the preparation of PMo-Ph3P+-SCMNPs hybrid nanomaterial. The PMo-Ph3P+-SCMNPs hybrid nanomaterial was characterized with different physicochemical methods such as FT-IR and ICP-AES spectroscopies, XRD, VSM, SEM, and TEM analyses. VSM analysis showed superparamagnetic properties of the prepared nanomaterial. TEM and SEM analyses indicated the aggregated nanoparticles with about 15 nm average size.