title: Controlled assembly of Fe3O4 magnetic nanoparticles on graphene oxide.
abstract: We describe a facile approach to controllable assembly of monodisperse Fe(3)O(4) nanoparticles (NPs) on chemically reduced graphene oxide (rGO). First, reduction and functionalization of GO by polyetheylenimine (PEI) were achieved simultaneously by simply heating the PEI and GO mixture at 60 °C for 12 h. The process is environmentally friendly and convenient compared with previously reported methods. Meso-2,3-dimercaptosuccinnic acid (DMSA)-modified Fe(3)O(4) NPs were then conjugated to the PEI moiety which is located on the periphery of the GO sheets via formation of amide bonds between COOH groups of DMSA molecules bound on the surface of the Fe(3)O(4) NPs and amine groups of PEI. The magnetic GO composites were characterized by means of TEM, AFM, UV-vis, FTIR, Raman, TGA, and VSM measurements. Finally, preliminary results of using the Fe(3)O(4)-rGO composites for efficient removal of tetracycline, an antibiotic that is often found as a contaminant in the environment, are reported.
authors.affiliation: Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou, 215123, PR China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Zhang
authors.forename: Biao
authors.initials: B
authors.lastname: Chen
authors.forename: Liming
authors.initials: L
authors.lastname: Zhang
authors.forename: Jie
authors.initials: J
authors.lastname: Huang
authors.forename: Fenghua
authors.initials: F
authors.lastname: Chen
authors.forename: Zupei
authors.initials: Z
authors.lastname: Yang
authors.forename: Jianlin
authors.initials: J
authors.lastname: Yao
authors.forename: Zhijun
authors.initials: Z
authors.lastname: Zhang
mesh_terms: D003460:Crystallization / Q000379:methods*; D005290:Ferric Compounds / Q000138:chemical synthesis*; D006108:Graphite / Q000737:chemistry*; D046911:Macromolecular Substances / Q000737:chemistry; D008280:Magnetics; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D013499:Surface Properties
chemical_list: D005290:Ferric Compounds; D046911:Macromolecular Substances; C000499:ferric oxide; D006108:Graphite