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The Effect of Calcination Temperature on the Surface Evolution and Photocatalysis Activity of Co-Doped PVAc/TiO2 Composite Nanofibers

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Abstract:

The Fe3+,La3+ co-doped polyvinyl acetate(PVAc)/titanium dioxide(TiO2) composite nanofibers were firstly prepared by combining sol-gel method and electrospinning process, and then calcined under 300°Cand 600°C separately. The effect of calcination temperature on structures, surface morphologies, crystalline state, elemental composition and photocatalysis activity were characterized by scanning electron microscope (SEM), atomic force microscope (AFM), X-ray Diffraction (XRD) , energy dispersive X-ray spectroscopy (EDX) and ultraviolet-visible spectrophotometer(UV-Vis) respectively. The SEM and AFM images showed that the nanofibers were randomly distributed to form the fibrous web, the diameters and surface roughness of nanofibers were obviously changed as the calcination tempreture increasing. The EDX analysis and XRD spectra indicated the percentage of C,O,Ti elements varied as the increase of tempreture and the formation of anatase crystal form TiO2 nanofibers under 600°C.The UV-Vis curves revealed strong adsorption to methylene blue under 600°C calcination.

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Periodical:

Advanced Materials Research (Volume 331)

Pages:

14-18

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.331.14

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Online since:

September 2011

Authors:

Ning Wu, Ya Nan Jiao, Zhi Qing Yuan, Yun Xing Liang, Li Chen

Keywords:

Calcination Tempreture, Fe 3+ La 3+ Co-Doped, Photocatalysis Activity, PVAc/TiO2 Nanofiber, Surface Evolution

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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