title: Spectroscopic characterization of magnetic Fe3O4@Au core shell nanoparticles.
abstract: The magnetic nanoparticles iron oxide (Fe3O4) nanoparticles and iron oxide/gold core-shell (Fe3O4/Au) nanoparticles were synthesized and their catalytic photo-degradation activity towards malathion as example of organophosphorus pesticides were reported. Iron oxide (Fe3O4) magnetic nanoparticle was successfully prepared through co-precipitation method by the reduction of ferric chloride (FeCl3) using ascorbic acid. The morphology of the prepared nanoparticles was characterized by the TEM and XRD (X-ray diffraction) techniques. Degradation of 10 ppm of malathion in the presence of these nanoparticles under UV radiation was monitored using (HPLC) and UV-visible spectra. Fe3O4/Au nanoparticles showed higher efficiency in photo-degradation of malathion than Fe3O4 ones.
authors.affiliation: Chemistry Department, Faculty of Science, Assiut University, Assiut 71516, Egypt. Electronic address: dinafouad93@hotmail.com.
authors.forename: Dina M
authors.initials: DM
authors.lastname: Fouad
authors.affiliation: Chemistry Department, Faculty of Science, Assiut University, Assiut 71516, Egypt. Electronic address: w.ahmed53@yahoo.com.
authors.forename: Waleed A
authors.initials: WA
authors.lastname: El-Said
authors.affiliation: National Institute of Laser Enhanced Science, NILES, Cairo University, Egypt. Electronic address: Mohamed_mona@hotmail.com.
authors.forename: Mona B
authors.initials: MB
authors.lastname: Mohamed
mesh_terms: D052203:Ferrosoferric Oxide / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D058185:Magnetite Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D008294:Malathion / Q000737:chemistry; D010782:Photolysis; D013056:Spectrophotometry, Ultraviolet; D014961:X-Ray Diffraction
chemical_list: D058185:Magnetite Nanoparticles; D006046:Gold; D008294:Malathion; D052203:Ferrosoferric Oxide
keywords: Electron microscopy; Magnetic properties; Nanostructures