Photocatalytic activity of magnetically separable La-doped TiO2/CoFe2O4 nanofibers prepared by two-spinneret electrospinning

A novel magnetically separable composite photocatalyst—〈La-doped TiO 2 〉/CoFe 2 O 4 nanofiber—was prepared by a two-spinneret electrospinning method combined with sol–gel method. The nanofibers were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron m...

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Bibliographic Details
Published in:Journal of materials science 2012, Vol.47 (1), p.465-472
Main Authors: Li, Xiu-Yan, Wang, Jiao-Na, Zhang, Lian-Lian, Li, Cong-Ju
Format: Article
Language:English
Subjects:
Catalytic activity
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Cobalt ferrites
Crystallography and Scattering Methods
Diameters
Electron microscopes
Electrospinning
Magnetic properties
Magnetometers
Materials Science
Methylene blue
Nanofibers
Organic compounds
Oxidation
Photocatalysis
Photodegradation
Photoelectrons
Polymer Sciences
Sol-gel processes
Solid Mechanics
Spectrum analysis
Titanium dioxide
X ray photoelectron spectroscopy
X-ray spectroscopy
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Summary:A novel magnetically separable composite photocatalyst—〈La-doped TiO 2 〉/CoFe 2 O 4 nanofiber—was prepared by a two-spinneret electrospinning method combined with sol–gel method. The nanofibers were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM), Energy dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), and vibrating sample magnetometer (VSM). It was shown that the diameter of 〈1.0% La-doped TiO 2 〉/CoFe 2 O 4 nanofibers was 100–150 nm after calcination at 600 °C for 2 h. EDS and XPS measurements on the photocatalytic material indicated the existence of La 3+ oxidation states in 〈1.0% La-doped TiO 2 〉/CoFe 2 O 4 nanofibers. The photocatalytic activity of as-prepared nanofibers was evaluated using methylene blue (MB) as a model organic compound and the result revealed that the 〈1.0% La-doped TiO 2 〉/CoFe 2 O 4 nanofibers have an efficient photocatalytic property, and the degradation rate of MB could reach 93% in 150 min. Moreover, the magnetic property of the nanofibers has also been characterized, and the nanofibers show a good magnetic response, which indicates that the possibility of the magnetic nanofibers’ potential recycling property.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-011-5821-0