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Synthesis of a magnetic core–shell carbon nanotube@MgNi2FeO4.5 nanotube composite

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In this paper, a magnetic core–shell composite with MgNi2FeO4.5 nanotubes as core and carbon nanotubes (CNTs) as shell was synthesized by in situ growth of CNTs on the surface of MgNi2FeO4.5 nanotubes via a catalytic chemical vapor deposition method. The MgNi2FeO4.5 nanotubes were prepared using a mixed aqueous solution of Mg(NO3)2, Ni(NO3)2 and Fe(NO3)3 (molar ratio of 1:2:1) and anodic aluminum oxide as template. Both the growth temperature and time of CNTs brought about effect on the structure and magnetic property of the composite were investigated. X-ray diffraction, transmission electron microscope, field emission scanning electron microscope, Raman spectroscopy and vibrating sample magnetometer were used to characterize the as-prepared samples. The MgNi2FeO4.5 nanotubes are parallel arranged, and the exterior surface of which is wrapped by CNTs when the growth temperature exceeding 480 °C. Magnetic measurement demonstrates the composite with higher growth temperature and shorter growth time possesses more excellent magnetic property.

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This research is supported by the Key Research Project of Universities in Henan Province (No. 18B610004) and Henan Provincial Science and Technology Plan Project (No. 182102210334).

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Correspondence to Yong Cao.

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Cao, Y., Wang, Y., Dong, Z. et al. Synthesis of a magnetic core–shell carbon nanotube@MgNi2FeO4.5 nanotube composite. Chem. Pap. 74, 175–182 (2020).

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