Synthesis of well-dispersed TiO2/CNTs@CoFe2O4 nanocomposites and their photocatalytic properties
TiO2/CNTs@CoFe2O4 nanocomposites were successfully prepared using CNTs@CoFe2O4 composites as supports. All TiO2/CNTs@CoFe2O4 nanocomposites show better photo catalytic activities upon degradation of methylene blue than pure TiO2. [Display omitted] •Cobalt ferrite microsphere were successfully prepar...
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Veröffentlicht in: | Materials research bulletin 2018-05, Vol.101, p.83-89 |
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Sprache: | eng |
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Zusammenfassung: | TiO2/CNTs@CoFe2O4 nanocomposites were successfully prepared using CNTs@CoFe2O4 composites as supports. All TiO2/CNTs@CoFe2O4 nanocomposites show better photo catalytic activities upon degradation of methylene blue than pure TiO2.
[Display omitted]
•Cobalt ferrite microsphere were successfully prepared by using hydrothermal method.•Core/shell structured CNTs@CoFe2O4 composites were prepared using CVD technique with CoFe2O4 microspheres as catalysts.•TiO2/CNTs@CoFe2O4 nanocomposites were successfully prepared using CNTs@CoFe2O4 composites as supports.•TiO2/CNTs@CoFe2O4 composites show better photo catalytic activities than pure TiO2.
In this work, core/shell structured CNTs@CoFe2O4 composites were prepared using CVD technique with CoFe2O4 microspheres as catalysts. Titanium dioxide (TiO2) was successfully loaded on the surface of CNTs@CoFe2O4 composites to get TiO2/CNTs@CoFe2O4 nanocomposites. As-prepared nanocomposites were examined by scanning electron microscopy, X-ray diffraction and transmission electron microscopy. The results show a successful loading of TiO2 nanoparticles on CNTs@CoFe2O4 composites. The photocatalytic properties of TiO2/CNTs@CoFe2O4 nanocomposites for methylene blue were investigated under UV light irradiation. The degradation rate of methylene blue is 96% for TiO2/CNTs@CoFe2O4 nanocomposites with TiO2 mass ratio of 68.4%, while it is 71% for pure TiO2. CNTs play a key role in the charge recombination to enhance the electron hole separation. CoFe2O4 is beneficial for the recyclability of the composite catalysts by providing a magnetic field. |
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ISSN: | 0025-5408 1873-4227 |
DOI: | 10.1016/j.materresbull.2018.01.017 |