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
Hauptverfasser: Sohail, Muhammad, Xue, Haoliang, Jiao, Qingze, Li, Hansheng, Khan, Khakemin, Wang, Shanshan, Feng, Caihong, Zhao, Yun
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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.
ISSN:0025-5408
1873-4227
DOI:10.1016/j.materresbull.2018.01.017