Synthesis and Photocatalytic Properties of Modified TiO2 Nanopores and Nanotubes
CYSENI 2013: 10th International Conference of Young Scientists on Energy Issues: Abstracts 2013
Reinis Drunka, Jānis Grabis, Aloizijs Patmalnieks

Titanium diokside is very promissing material for photocatalyse, degradation of organic compounds, splitting of water, for manifacturine self-cleaning materials and dye- sensitized solar cells. It is generally concluded that the photocatalytic activity depends on the specifice surface area, degree of crystalization of the titania particles, phase composion and presence of dopants, witch promotes absorbtion of visible light. Self-organized TiO2 nanotube-layers were formed by electrochemical anodization of titania foil in a (NH4)2SO4/HF electrolyte. Doped with sulfur nanotubes and nanopores were prepared by their treatment at 3800C in H2S flow or by using method of micro arc oxidation in sulfur containing electrolyte. Doped with nitrogen nanotubes were obtained by their treatment at 500 0C per 2h in N2 flow. Doped with tungsten oxide nanotubes were prepared by anodization of TiO2 foil mechanically rubbed with tungsten particles or by additional anodization of the as-prepared TiO2 nanotubes in peroxitungstic acid sol and ethanol-water electrolyte. The catalytic activity was determined by degradation of MB solution under UV and visible light illumination. The photocatalytic activity of the prepared TiO2 nanotubes depends on the preparation conditions, the presence of WO3, S and N increases their activity. During illumination the degradation of MB reaches 85–90% depending on applied dopants. The prepared photocatalysts have higher activity with respect to pure TiO2 nanotubes. Sulfur doped nanotubes have higher activity with respect to nitrogen and WO3 doped nanotubes.


Atslēgas vārdi
titania nanotubes, sulfur, nitrogen, tungsten oxide dopants, methylene blue decomposition 1
Hipersaite
http://cyseni.com/archives/abstracts/CYSENI_2013_abstracts.zip

Drunka, R., Grabis, J., Patmalnieks, A. Synthesis and Photocatalytic Properties of Modified TiO2 Nanopores and Nanotubes. No: CYSENI 2013: 10th International Conference of Young Scientists on Energy Issues: Abstracts, Lietuva, Kaunas, 29.-31. maijs, 2013. Kaunas: Lietuvos energetikos institutas, 2013, 1.-1.lpp.

Publikācijas valoda
English (en)
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