Fe_3O_4/AuNPs磁性复合粒子的制备与表征  

Synthesis and characterization of Fe_3O_4/AuNPs magnetic composite nanoparticles

作　　者：代昭[1] 杨坤[1] 黄丹丹[1] 初园园[1] 

机构地区：[1]天津工业大学环境与化学工程学院,天津300387

出　　处：《天津工业大学学报》2015年第3期28-31,共4页Journal of Tiangong University

基　　金：国家自然科学基金资助项目(21172171;21206124)

摘　　要：通过溶剂热法合成了较大粒径的磁性Fe3O4纳米粒子,使用3-氨丙基三乙氧基硅烷(APTES)在乙醇/异丙醇体系中将其表面功能化一层氨基,随后将金纳米粒子(Au NPs)自组装于Fe3O4粒子表面,得到了Fe3O4/Au NPs纳米粒子;采用透射电子显微镜(TEM)、X-射线衍射(XRD)、振动样品磁强计(VSM)和紫外-可见光吸收光谱仪(UV-Vis)对复合粒子的形态、结构及性质进行表征.结果表明:所制备的Fe3O4磁纳米粒子粒径均一,平均粒径约为250 nm,形状几乎都呈球形,磁性Fe3O4/Au NPs复合粒子包覆均匀、具有良好的的分散性和磁化率,同时兼有磁性和金纳米粒子的特性.Fe3O4 magnetic nanoparticles with large particle size were synthesized by a solvothermal method, and then modified by （3-aminopropyl）triethoxysilane （APTES） in the system of ethanol and isopropanol, which can functionalized the surface a layer of amino groups. Then, magnetic Fe3O4/Au nanoparticles were prepared by connecting gold nanoparticles under the condition of ultrasound. These composite particles have been characterized by transmission electron microscopy （TEM）, X-ray powder diffraction （XRD）, vibrating sample magnetometer（VSM） and ultraviolet-visible spectrophotometer （UV-Vis）. The result shows that the prepared Fe3O4 nanoparticles have a uniform particle size and spherical shape, the average size is 250 nm. Fe3O4/Au composite particles coated evenly, have a good dispersibility and magnetic susceptibility, possess magnetism and characteristics of gold nanoparticles at the same time.

关 键 词：FE3O4 金纳米粒子(AuNPs) 磁性纳米粒子 复合粒子 

分 类 号：TB331[一般工业技术—材料科学与工程]