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Title: La-doped TiO2 hollow fibers and their photocatalytic activity under UV and visible light
Authors: Yao, Shuhua
Jia, Xueying
Jiao, Lulu
Zhu, Chuang
Shi, Zhongliang
Keywords: Photocatalysts;Titania;Lanthanum doping;Fiber templates;Photocatalytic activity;Methyl orange
Issue Date: 7-Aug-2012
Abstract: A series of La-doped TiO2 photocatalytic material with a hollow fiber structure has been successfully prepared using La(NO3)3·6H2O and Ti(OC4H9)4 as precursors and cotton fiber as the template. Scanning electron microscopy, X-ray diffraction, N2 adsorption-desorption measurements, UV-vis diffuse absorption spectra and X-ray photoelectron spectroscopy have been used to characterize the morphology, crystal structure, surface structure and optical absorption properties of the samples. The photocatalytic activity of the samples with varying amounts of La-doped has been studied by photodegradation of methyl orange in water under UV and visible light. Results show that La doping restrains the growth of grain size and extends the photoabsorption edge of TiO2 hollow fiber into the visible light region. The fiber structured material shows better photocatalytic properties for the degradation of methyl orange than pure TiO2 under UV and visible light. The amount of La-doping significantly affected the catalytic property. Under the experiment conditions, the photocatalytic activity of 0.5 mol% La-doped TiO2 fiber is optimal amongst the studied samples. The prepared La-doped TiO2 fiber is a low energy consuming, high activity and green environmental-friendly catalytic material.
Page(s): 1049-1056
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.51A(08) [August 2012]

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