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The Effect of Calcination Temperature on Structure and Photocatalytic Properties of WO3/TiO2 Nanocomposites

Abstract

Series ofWO3/TiO2 nanocompositeswere obtained by hydrothermal method followed by calcination in the temperature range from 400∘C to 900∘C. The characteristics of photocatalysts by X-ray diffractometry (XRD), scanning electron microscope (SEM), and diffuse reflectance spectroscopy (DRS) showed that increasing the calcination temperature from 400 to 900∘C resulted in change of photocatalytic activity under UV-Vis light.Moreover, the amount ofWO3 crystalline phase and amorphous phase inWO3/TiO2 aggregates, as revealed by XRD analysis, was dependent on the calcination temperature.TheWO3/TiO2 samples with 8 mol% load ofWO3 in respect to TiO2 calcinated at 500 and 800∘C possess the highest photocatalytic activity in reaction of phenol degradation, which is about 1.2 and 1.5 times that with calcination at 400∘C. The increase in calcination temperature above 400∘C resulted in increase of WO3 crystallinity and reduction of the amount of amorphous phase in the nanocomposite structure. Moreover, the annealing of nanocomposites above 700∘C decreases the value of optical band gap energies of obtainedWO3/TiO2 nanomaterials.

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Details

Category:
Articles
Type:
artykuł w czasopiśmie wyróżnionym w JCR
Published in:
Journal of Nanomaterials no. 2016, pages 1 - 8,
ISSN: 1687-4110
Language:
English
Publication year:
2016
Bibliographic description:
Mioduska J., Zielińska-Jurek A., Janczarek M., Hupka J.: The Effect of Calcination Temperature on Structure and Photocatalytic Properties of WO3/TiO2 Nanocomposites// Journal of Nanomaterials. -Vol. 2016, (2016), s.1-8
DOI:
Digital Object Identifier (open in new tab) 10.1155/2016/3145912
Verified by:
Gdańsk University of Technology

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