Synthesis and magnetic characteristics of core-shell Fe3O4 nano-particles with highly efficient performances

被引：0
作者：
Yuwen, Xinyuan [1 ]
Hu, Xiaorui [1 ]
Yan, Haihong [1 ]
Ren, R. [1 ]
Wang, Yilin [1 ]
Zhao, Fuhai [1 ]
Chu, Xunchao [1 ]
机构：
[1] Xi An Jiao Tong Univ, Dept Opt Informat, Phys, MOE KLNSMC Mech, Xian 712000, Peoples R China
来源：
OPTOELECTRONICS AND ADVANCED MATERIALS-RAPID COMMUNICATIONS | 2020年 / 14卷 / 11-12期
基金：
中国国家自然科学基金;
关键词：
Magnetic nano structures; Magnetic core shell; Synthesis; Heterostructure; HYDROTHERMAL SYNTHESIS; NANOTUBES SYNTHESIS; NANOPARTICLES; ABSORPTION; FE;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The core-shell Fe3O4@SiO2 and Fe3O4@SiO2@TiO2 nanoparticles were prepared by the chemical co-precipitation method and chemical conversion process, and characterized by X ray diffraction (XRD), transmission electron microscopy (TEM), saturated magnetization (VSM), FTIR and adsorbent spectrum, and UV visible spectroscopy. VSM indicated the Fe3O4@SiO2 nano spheres had saturated magnetization of 33.5 emu/g and coercive force of 85 Oe. XRD patterns 2 theta peaks of Fe3O4 matched well with lattice planes of the face centered cubic lattice of JCPDS Card. The Fe3O4@SiO2 diffraction angles of 30.28 degrees, 35.58 degrees, 43.24 degrees, 57.26 degrees, and 62.71 degrees corresponded to SiO2 (220), (311), (400), (511), and (440) crystal faces, respectively. Compared to the room temperature spectrum , FTIR spectra confirmed the peaks at 1325 and 1152 cm(-1) were ascribed to O=S=O stretching vibrations. The result may be attributed to that the surface modified Fe3O4 and the utilization of visible light and hinder the recombination process.
引用
收藏
页码：563 / 568
页数：6
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