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  • Title: Enhanced visible-light-driven photocatalysis of surface nitrided electrospun TiO2 nanofibers.
    Author: Li H, Zhang W, Huang S, Pan W.
    Journal: Nanoscale; 2012 Feb 07; 4(3):801-6. PubMed ID: 22159152.
    Abstract:
    Enhanced visible-light-driven photocatalysis of TiO(2) nanofibers have been prepared by the electrospinning method combined with a surface nitridation process. The visible-light-driven photo-catalytic activity of surface nitrided TiO(2) (N-TiO(2)) nanofibers has been evaluated using rhodamine B indicator, and it was found that the visible-light-driven photocatalytic activity of the electrospun TiO(2) nanofibers could be enhanced by nitridation in NH(3) atmosphere. The optimal visible-light photocatalytic activity of N-TiO(2) nanofibers exceeded that of pure TiO(2) nanofibers by a factor of more than 12. The nitridation temperature under NH(3) flow was found to play an important part in the performance of N-TiO(2) nanofibers, and the optimum temperature is 500 °C. Structure, morphology and photoluminescence of these nanofibers were studied by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), scanning electron microscope (SEM) and photoluminescence (PL) spectroscopy. The mechanism of the enhancement of visible-light-driven photocatalytic activity by surface nitridation has been discussed.
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