title: Carboxylic acid effects on the size and catalytic activity of magnetite nanoparticles.
abstract: Magnetite nanoparticles (Fe3O4-NPs) were successfully synthesized in diethylene glycol in the presence of carboxylic acids. They were characterized using XRD, SEM and FTIR. Carboxylic acid plays a critical role in determining the morphology, particle size and size distribution of the resulting particles. The results show that as-prepared magnetite nanoparticles are monodisperse and highly crystalline. The nanoparticles can be easily dispersed in aqueous media and other polar solvents due to coated by a layer of hydrophilic polyol and carboxylic acid ligands in situ. Easily prepared Fe3O4-NPs have been shown to be an active, recyclable, and highly selective catalyst for the epoxidation of cyclic olefins with aqueous 30% H2O2.
authors.affiliation: Department of Chemistry, University of Zanjan, 45195-313 Zanjan, Islamic Republic of Iran. Electronic address: monfared@znu.ac.ir.
authors.forename: Hassan
authors.initials: H
authors.lastname: Hosseini-Monfared
authors.affiliation: Department of Chemistry, University of Zanjan, 45195-313 Zanjan, Islamic Republic of Iran.
authors.forename: Fatemeh
authors.initials: F
authors.lastname: Parchegani
authors.affiliation: Department of Chemistry, University of Zanjan, 45195-313 Zanjan, Islamic Republic of Iran.
authors.forename: Sohaila
authors.initials: S
authors.lastname: Alavi
keywords: Carboxylic acid; Epoxidation; Hydrogen peroxide; Magnetite nanoparticles