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Enhanced Photocatalytic Activity of Electrospun TiO 2 Nanofibers with Optimal Anatase/Rutile Ratio
Author(s) -
Li Heping,
Zhang Wei,
Pan Wei
Publication year - 2011
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2011.04748.x
Subject(s) - photocatalysis , anatase , nanofiber , rutile , rhodamine b , materials science , calcination , chemical engineering , annealing (glass) , electrospinning , nanotechnology , chemistry , composite material , catalysis , organic chemistry , polymer , engineering
By way of electrospinning followed by annealing at different temperatures, TiO 2 nanofibers with different phases have been successfully fabricated. The corresponding ultraviolet photocatalytic activity was evaluated using rhodamine B degradation as a probe reaction. The photocatalytic activity of TiO 2 nanofibers is found to be enhanced when annealed at higher temperatures with amount of anatase phase transformed to rutile. An optimal annealing temperature exists on the photocatalytic activity of TiO 2 nanofibers, which increases with the increasing of the calcination temperature up to 600°C and then decreases. According to their phase transformations monitored by X ‐ray diffraction, the different crystalline structures could be the reason for the enhanced photocatalytic activity of these electrospun TiO 2 nanofibers.