Photochromic and photocatalytic properties of ultra-small PVP-stabilized WOsub.3./sub. nanoparticles

0534394 - FZÚ 2021 RIV CH eng J - Journal Article
Kozlov, D.A. - Shcherbakov, A.B. - Kozlova, T.O. - Angelov, Borislav - Kopitsa, G. P. - Garshev, A.V. - Baranchikov, A. E. - Ivanova, O.S. - Ivanov, V. K.
Photochromic and photocatalytic properties of ultra-small PVP-stabilized WOsub.3 nanoparticles.
Molecules. Roč. 25, č. 1 (2020), s. 1-16, č. článku 154. E-ISSN 1420-3049
Institutional support: RVO:68378271
Keywords : tungsten oxide * polyvinylpyrrolidone * ion exchange * photochromism * photocatalysis
OECD category: Biophysics
Impact factor: 4.412, year: 2020
Method of publishing: Open access

Tungsten oxide-based bulk and nanocrystalline materials are widely used as photocatalytic and photo- and electrochromic materials, as well as materials for biomedical applications. In our work, we focused our attention on the effect of sodium cations on the structure and photochromic properties of the WO3@PVP aqueous sols. To establish the effect, the sols were synthesized by either simple pH adjusting of sodium or ammonium tungstates' solutions, or using an ion exchange technique to remove the cations from the materials to the greatest possible extent. We showed that the presence of sodium cations in WO3@PVP favors the formation of reduced tungsten species (W+5) upon UV irradiation of the materials, strongly affecting their photochromic and photocatalytic properties.

Permanent Link: http://hdl.handle.net/11104/0312594