title: Magnetic solid-phase extraction of brominated flame retardants from environmental waters with graphene-doped Fe3O4 nanocomposites.
abstract: Graphene-doped Fe3O4 nanocomposites were prepared by a solvothermal reaction of an iron source with graphene. The nanocomposites were characterized by transmission electron microscopy, atomic force microscopy, X-ray diffraction, superconducting quantum interference, Raman spectroscopy, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy. This nanomaterial has been used as a magnetic solid-phase extraction sorbent to extract trace brominated flame retardants from environmental waters. Various extraction parameters were optimized including dosage and reusability of the nanocomposites, and pH of sample matrix. The reliability of the magnetic solid-phase extraction protocol based on graphene-doped Fe3O4 nanocomposites was evaluated by investigating the recoveries of 2,4,6-tribromophenol, tetrabromobisphenol A, 4-bromodiphenyl ether, and 4,4'-dibromodiphenyl ether in water samples. Good recoveries (85.0-105.0%) were achieved with the relative standard deviation ranging from 1.1-7.1%. Moreover, it is speculated from characterization and magnetic solid-phase extraction experiment that there is not only π-π stacking but also possible hydrophobic interaction between the graphene-doped Fe3O4 nanocomposites and analytes.
authors.affiliation: Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of Biomedical Materials, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing, China.|State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry & Chemical Engineering and Center of Materials Analysis, Nanjing University, Nanjing, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Yang
authors.affiliation: State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry & Chemical Engineering and Center of Materials Analysis, Nanjing University, Nanjing, China.
authors.forename: Jun-qin
authors.initials: JQ
authors.lastname: Qiao
authors.affiliation: Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of Biomedical Materials, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing, China.
authors.forename: Shi-hai
authors.initials: SH
authors.lastname: Cui
authors.affiliation: State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry & Chemical Engineering and Center of Materials Analysis, Nanjing University, Nanjing, China.
authors.forename: Jia-yuan
authors.initials: JY
authors.lastname: Li
authors.affiliation: State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry & Chemical Engineering and Center of Materials Analysis, Nanjing University, Nanjing, China.
authors.forename: Jin-jin
authors.initials: JJ
authors.lastname: Zhu
authors.affiliation: State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry & Chemical Engineering and Center of Materials Analysis, Nanjing University, Nanjing, China.
authors.forename: He-xing
authors.initials: HX
authors.lastname: Yin
authors.affiliation: State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry & Chemical Engineering and Center of Materials Analysis, Nanjing University, Nanjing, China.
authors.forename: Cheng-yan
authors.initials: CY
authors.lastname: Zhan
authors.affiliation: State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry & Chemical Engineering and Center of Materials Analysis, Nanjing University, Nanjing, China.
authors.forename: Hong-zhen
authors.initials: HZ
authors.lastname: Lian
mesh_terms: D001966:Bromine / Q000737:chemistry*; D052203:Ferrosoferric Oxide / Q000737:chemistry*; D005411:Flame Retardants / Q000302:isolation & purification*; D006108:Graphite / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D008280:Magnetics; D018625:Microscopy, Atomic Force; D046529:Microscopy, Electron, Transmission; D053761:Nanocomposites; D052616:Solid Phase Extraction / Q000379:methods*; D013057:Spectrum Analysis / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification*; D014961:X-Ray Diffraction
chemical_list: D005411:Flame Retardants; D014874:Water Pollutants, Chemical; D006108:Graphite; D001966:Bromine; D052203:Ferrosoferric Oxide
keywords: Brominated flame retardants; Graphene; Hydrophobic interactions; Magnetic nanocomposites; Solid-phase extraction