Bifunctional Fe₃O₄@C/YVO₄:Sm³⁺ composites with the core-shell structure

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• 作者：Jianhui Shi^a ; Lizhu Tong^a ; Xiaozhen Ren^a ; Quanhong Li^a ; Hong Ding^b ; Hua Yang^a ; ^{huayang86@sina.com}
• 关键词：Composite materials ; Coatings ; Luminescence ; Magnetic properties
• 刊名：Materials Chemistry and Physics
• 出版年：2013
• 出版时间：15 April, 2013
• 年：2013
• 卷：139
• 期：1
• 页码：73-78
• 全文大小：964 K

文摘

A novel Fe₃O₄@C/YVO₄:Sm³⁺ composites with magnetic and luminescent properties were reported. Firstly, the as-synthesized Fe₃O₄ nanoparticles were coated by carbon as a shell via a simple hydrothermal method. Furthermore, the Fe₃O₄@C nanoparticles were modified by YVO₄:Sm³⁺ phosphors through a simple sol-gel process to prepared the Fe₃O₄@C/YVO₄:Sm³⁺ microspheres. The characterization of as-prepared products were measured by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), photoluminescence (PL) spectra, and vibrating sample magnetometer (VSM). It is shown that Fe₃O₄@C/YVO₄:Sm³⁺ composites with well-crystallized and core-shell structure were prepared. Additionally, the Fe₃O₄@C/YVO₄:Sm³⁺ composites show excellent magnetic properties (13?emu/g) and luminescent properties, which made the composites useful for applications in biomedical devices such as magnetic bio-separation and drug/gene delivery.