中文摘要：

超声条件下,在乙醇分散的3-氨丙基三乙氧基硅烷（APTES）功能化的磁性Fe3O4纳米粒子和氯铂酸的混合溶液中,滴加水合肼成功地制备了磁性Fe3O4/Pt复合纳米粒子。采用紫外吸收可见光谱（UV-Vis）,电子能谱仪（EDS）,透射电子显微镜（TEM）,光电子能谱（XPS）,超导量子干涉仪（SQUID）等方法对复合粒子的形态、结构、组成以及磁学性质进行了表征。结果表明：在此条件下制得的复合粒子粒度在50nm左右,室温下磁化强度可达17.2（A·m2）/kg。

英文摘要：

Magnetic composite nanoparticles Fe3O4/Pt were prepared via ultrasonic irradiation to the mixed solution of hexachloroplatinum acid hydrate solution and（3-aminopropyl）triethoxysilane（APTES）-coated Fe3O4 nanoparticles and subsequent dropping addition of hydrozine hydrate.The morphology,microstructure,composition and magnetic properties of the Fe3O4/Pt nanoparticles were characterized by ultraviolet-visible spectroscopy（UV-Vis）,energy dispersive spectroscopy（EDS）,transmission electron microscopy（TEM）,X-ray photoelectron spectroscopy（XPS） and superconducting quantum interference device（SQUID） magnetometry.Results show that Fe3O4/Pt nanoparticles obtained under the conditions possess saturation magnetization intensity of about 17.2（A·m2）/kg,and their average diameter is about 50 nm.