ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Synthesis of a magnetic core–shell carbon nanotube@MgNi₂FeO_4.5 nanotube composite

Yong Cao, Yixin Wang, Ziming Dong, Xiangyang Zhang, Chenhao Xiao, and Guoting Li

North China University of Water Resources and Electric Power, Zhengzhou, People’s Republic of China

E-mail: caoyangel@126.com

Abstract: In this paper, a magnetic core–shell composite with MgNi₂FeO_4.5 nanotubes as core and carbon nanotubes (CNTs) as shell was synthesized by in situ growth of CNTs on the surface of MgNi₂FeO_4.5 nanotubes via a catalytic chemical vapor deposition method. The MgNi₂FeO_4.5 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 MgNi₂FeO_4.5 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.

Keywords: Carbon nanotubes ; MgNi₂FeO_4.5 nanotubes ; Chemical vapor deposition ; Magnetic property 

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-019-00867-x

Chemical Papers 74 (1) 175–182 (2020)