43. Novel magnetic NiFe2O4/multi-walled carbon nanotubes hybrids: Facile synthesis, characterization, and application to the treatment of dyeing wastewater
writer：H.-Y. Zhu, R. Jiang, S.-H. Huang, J. Yao, F.-Q. Fu, J.-B. Li
keywords：Nickel ferrite; Carbon nanotubes; Photocatalysis; Dye
source：期刊
specific source：Ceramics Inernational
Issue time：2015年
Novel magnetically recyclable spinel nickel
ferrite/multi-walled carbon nanotubes hybrids (NiFe2O4/MWCNTs
hybrids) with different MWCNTs content were prepared by a facile one-step
hydrothermal method. The as-prepared NiFe2O4/MWCNTs
hybrids were characterized by powder X-ray diffraction (XRD), UV–vis diffuse
reflectance spectra (DRS), scanning electron microscope (SEM) and vibrating sample magnetometer
(VSM). Photocatalytic activity of NiFe2O4/MWCNTs hybrids
was investigated by photocatalytic decolorization of Congo Red (CR) in aqueous
solution under simulated solar light irradiation. NiFe2O4/MWCNTs
yielded efficient decolorization of CR solution with an apparent rate constant
of 0.01433 min-1, which was 2.18 times that of NiFe2O4. Significantly
enhanced activity of NiFe2O4/MWCNTs hybrids resulted from
the synergistic contribution of both high adsorption capacity towards CR and the participation of holes (h+),
?OH radicals and O2?? radicals. In
addition, the NiFe2O4/MWCNTs hybrids can be recovered
conveniently using an external magnet. As a result, the novel NiFe2O4/MWCNTs could gain a promising application in
treatment of various dyestuff wastewaters on a large scale.