Abstract
Magnetic Co1−x N x Fe2O4/Carbon nanotube (CNTs) nanocomposite was successfully prepared by hydrothermal method and used for the adsorption of pentachlorophenol. The properties of Co1−x N x Fe2O4/CNTs were characterized by scanning and transmission electron microscopy, energy dispersive X-ray spectroscopy, X-ray diffractometry, Brunauer-Emmett-Teller surface area determination, and magnetic measurement. Results showed that the Co1−x N x Fe2O4 nanoparticles with amorphous structure are dispersed uniformly on the CNTs, which enhanced the adsorption capacity. The Co1−x N x Fe2O4/CNTs as a magnetic material are easy to separate from the aqueous solution in magnetic field. The adsorption capacity and magnetization were improved by controlling the Ni content and calcination temperature. In addition, the Co1−x N x Fe2O4/CNTs loaded with pentachlorophenol (PCP) could be regenerated by microwave radiation and the regeneration efficiency reached 110% after six regeneration cycles.
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