title: Green biosynthesis and characterization of magnetic iron oxide (Fe₃O₄) nanoparticles using seaweed (Sargassum muticum) aqueous extract.
abstract: The synthesis of nanoparticles has become a matter of great interest in recent times due to their various advantageous properties and applications in a variety of fields. The exploitation of different plant materials for the biosynthesis of nanoparticles is considered a green technology because it does not involve any harmful chemicals. In this study, iron oxide nanoparticles (Fe3O4-NPs) were synthesized using a rapid, single step and completely green biosynthetic method by reduction of ferric chloride solution with brown seaweed (BS, Sargassum muticum) water extract containing sulphated polysaccharides as a main factor which acts as reducing agent and efficient stabilizer. The structural and properties of the Fe3O4-NPs were investigated by X-ray diffraction, Fourier transform infrared spectroscopy, field emission scanning electron microscopy (FESEM), energy dispersive X-ray fluorescence spectrometry (EDXRF), vibrating sample magnetometry (VSM) and transmission electron microscopy. The average particle diameter as determined by TEM was found to be 18 ± 4 nm. X-ray diffraction showed that the nanoparticles are crystalline in nature, with a cubic shape. The nanoparticles synthesized through this biosynthesis method can potentially useful in various applications.
authors.affiliation: Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia.
authors.forename: Mahnaz
authors.initials: M
authors.lastname: Mahdavi
authors.forename: Farideh
authors.initials: F
authors.lastname: Namvar
authors.forename: Mansor Bin
authors.initials: MB
authors.lastname: Ahmad
authors.forename: Rosfarizan
authors.initials: R
authors.lastname: Mohamad
mesh_terms: D002712:Chlorides / Q000737:chemistry; D005290:Ferric Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D010316:Particle Size; D010936:Plant Extracts / Q000737:chemistry*; D044647:Sargassum / Q000737:chemistry*; D012624:Seaweed / Q000737:chemistry*
chemical_list: D002712:Chlorides; D005290:Ferric Compounds; D010936:Plant Extracts; C000499:ferric oxide; C024555:ferric chloride