Facile preparation of nitrogen-doped nanostructured titania microspheres by a new method of Thermally Assisted Reactions in Aqueous Spraysстатья

Статья опубликована в высокорейтинговом журнале
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 27 марта 2014 г.

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[1] Facile preparation of nitrogen-doped nanostructured titania microspheres by a new method of thermally assisted reactions in aqueous sprays / T. Alexey, T. German, M. Anton et al. // Journal of Materials Chemistry. — 2014. — Vol. 2, no. 9. — P. 3102–3109. N-doped titania nanocrystalline microspheres with controlled visible light absorption were obtained via a new promising preparation method. TiO2 was obtained utilizing a heterogeneous hydrolysis of TiCl4 vapour with water or reactive aqueous solution aerosol droplets, followed by immediate calcination of hydrolysis products in a preheated flow reactor. Thus prepared none-agglomerated microspheres with the diameter within 0.5 – 3 microns were found to consist of anatase or rutile nanocrystalls, depending on parameters of the synthesis. Doped titania samples with a different content of nitrogen atoms were synthesized using water solutions with various concentration of urea in hydrolyzing aerosols. N- species were found to be a major form of nitrogen impurity. A plausible mechanism of the nitrogen incorporation into the titanium dioxide was proposed. The photocatalytic activity of the obtained powders under uv-visible or visible illumination was found to have a complex dependence of the calcination temperature and their doping level. [ DOI ]

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