期刊
CERAMICS INTERNATIONAL
卷 41, 期 9, 页码 11625-11631出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2015.05.122
关键词
Nickel ferrite; Carbon nanotubes; Photocatalysis; Dye
资金
- Natural Science Foundation of Zhejiang Province, China [LY15E080002, LY14B070011]
- Natural Science Foundation of China, China [51208331]
- China Scholarship Council, China [201308330411]
- Innovative Research Team on Plant Evolutionary Ecology
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(+)), center dot OH radicals and O-2(center dot-) 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. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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