Kishore P N R, Jeevanandam P
Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India.
J Nanosci Nanotechnol. 2011 Apr;11(4):3445-53. doi: 10.1166/jnn.2011.3748.
Silver-iron oxide nanocomposites were synthesized by an easy thermal decomposition method using iron acetyl acetonate and silver acetate as precursors and oleic acid (OA) and oleyl amine (OLA) as the capping agents in a single step. The composite samples were characterized by X-ray diffraction (XRD), infrared spectroscopy, thermal gravimetric analysis (TGA), UV-Visible spectroscopy, scanning electron microscopy (SEM), and magnetic measurements. Powder XRD and UV-Visible spectroscopy results indicate the presence of nanocrystalline silver in the composite and the FT-IR results coupled with TGA results indicate the presence of ligand molecules on surface of the nanocomposites. The FE-SEM images show that the nanocomposite particles are mainly spherical in shape while the energy dispersive X-ray analysis studies indicate the presence of iron and oxygen in the composites. From the magnetic measurements, the composites were found to be superparamagnetic with characteristic blocking temperatures indicating the presence of iron oxide nanoparticles in the nanocomposites.
采用简便的热分解法,以乙酰丙酮铁和醋酸银为前驱体,油酸(OA)和油胺(OLA)为封端剂,一步合成了银-氧化铁纳米复合材料。通过X射线衍射(XRD)、红外光谱、热重分析(TGA)、紫外-可见光谱、扫描电子显微镜(SEM)和磁性测量对复合样品进行了表征。粉末XRD和紫外-可见光谱结果表明复合材料中存在纳米晶银,傅里叶变换红外光谱(FT-IR)结果与TGA结果表明纳米复合材料表面存在配体分子。场发射扫描电子显微镜(FE-SEM)图像显示纳米复合颗粒主要呈球形,而能量色散X射线分析研究表明复合材料中存在铁和氧。通过磁性测量,发现复合材料具有超顺磁性,其特征阻塞温度表明纳米复合材料中存在氧化铁纳米颗粒。
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