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XINYUAN YUWEN1, XIAORUI HU1, HAIHONG YAN1, R. REN1,* , YILIN WANG1, FUHAI ZHAO1, XUNCHAO CHU1
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 mag netization of 33.5 emu/g and coercive force of 85 Oe. XRD patterns 2θ 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 °°, 35 .58°, 43.24°, 57.26°, and 62.71° 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 cm1 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.
Magnetic nano structures, Magnetic core shell, Synthesis , Heterostructure.
XINYUAN YUWEN, XIAORUI HU, HAIHONG YAN, R. REN, YILIN WANG, FUHAI ZHAO, XUNCHAO CHU, Synthesis and magnetic characteristics of core-shell Fe3O4 nano-particles with highly efficient performances, Optoelectronics and Advanced Materials - Rapid Communications, 14, 11-12, November-December 2020, pp.563-568 (2020).
Submitted at: June 11, 2020
Accepted at: Nov. 25, 2020
Optoelectronics and Advanced Materials - Rapid Communications
(2023): 0.5 - 2023 Journal Citation Reports (Clarivate Analytics, 2024)
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