Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/32598
Title: Synthesis and photocatalytic performance of the electrospun Bi 2Fe4O9 nanofibers
Authors: Qi, S
Zuo, R
Wang, Y 
Chan-Wong, LW 
Issue Date: 2013
Publisher: Springer
Source: Journal of materials science, 2013, v. 48, no. 11, p. 4143-4150 How to cite?
Journal: Journal of materials science 
Abstract: Bi2Fe4O9 nanofibers were successfully synthesized by an electrospinning method combined with a sol-gel process. The as-spun nanofibers were annealed at different temperatures ranging from 500 to 700 C and a pure orthorhombic phase was obtained at 700 C. The thermo-decomposition behavior, structure, morphology, optical property, and the specific surface area of the nanofibers were characterized by thermogravimetry and differential scanning calorimetry, X-ray diffraction, field emission scanning electron microscopy, UV-vis diffuse reflectance spectroscopy and photoluminescene spectroscopy, and specific surface analyzer, respectively. The results indicated that the diameter and morphology of the fiber changed with different calcination temperatures. Moreover, the results of UV-vis diffuse reflectance spectroscopy revealed that the Bi2Fe4O 9 nanofiber could be a photocatalyst under a visible light irradiation and the bandgap value was determined to be 2.1 eV based on the Kubelka-Munk theory. The photocatalytic activity of the obtained nanofibers was evaluated by the degradation of methyl orange. A favorable degradation rate of 45 % was obtained for the sample annealed at 600 C under the illumination of visible light for 3 h and an enhanced efficiency up to 70 % with recycling stability could be obtained with the aid of H2O2 for the pure-phase sample annealed at 700 C. These results demonstrated that the electrospun Bi2Fe4O9 nanofibers could be a promising visible light photocatalyst.
URI: http://hdl.handle.net/10397/32598
ISSN: 0022-2461
EISSN: 1573-4803
DOI: 10.1007/s10853-013-7227-7
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