title: Monodisperse magnetic core/shell microspheres with Pd nanoparticles-incorporated-carbon shells.
abstract: This work reports a hard self-template method to synthesize core/shell like Fe3O4@C microparticles, in which the Pd nanocrystals can be alternatively incorporated into the carbon shells. The Fe3O4@polyaniline core/shell microspheres were first synthesized as the precursor by in situ polymerization of aniline onto the surface of the Fe3O4 microspheres. In a subsequent carbonization of the precursor under a vacuum oven, the Fe3O4 core was preserved and the polyaniline shell transferred into carbon shells enveloping the magnetic sphere, forming magnetic Fe3O4@C microspheres. The Pd ions could be impregnated into the polyaniline shell, and thus the obtained composites were transformed into Fe3O4@C/Pd microspheres under the same vacuum heating progress. The as-obtained system demonstrates superparamagnetic characteristics, which would benefit its potential application in nanocatalysts. This strategy provides an efficient approach for tailoring core/shell materials with desired functionalities and structures by adjusting the precursors and structure-directing agents.
authors: School of Medical Engineering, Hefei University of Technology, Hefei, 230009, P.R. China. hjxu@hfut.edu.cn.
authors: Qunling
authors: Q
authors: Fang
authors: Qing
authors: Q
authors: Cheng
authors: Huajian
authors: H
authors: Xu
authors: Shouhu
authors: S
authors: Xuan
mesh_terms: D000814:Aniline Compounds / Q000737:chemistry; D002384:Catalysis; D052203:Ferrosoferric Oxide / Q000737:chemistry; D053768:Metal Nanoparticles / Q000737:chemistry*; D008863:Microspheres; D008958:Models, Molecular; D008968:Molecular Conformation; D010165:Palladium / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry
chemical_list: D000814:Aniline Compounds; D012997:Solvents; C416807:polyaniline; D010165:Palladium; D052203:Ferrosoferric Oxide