Photocatalytic Properties of Hollow BiFeO3 Spheres
| Autor: | E. V. Vladimirova, A. V. Dmitriev, M. V. Kuznetsov, L. Yu. Buldakova, Inna V. Baklanova, M. V. Kandaurov |
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| Rok vydání: | 2019 |
| Předmět: |
Argon
Band gap General Chemical Engineering chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Catalysis chemistry.chemical_compound chemistry X-ray photoelectron spectroscopy Chemical engineering Photocatalysis Irradiation 0210 nano-technology Bismuth ferrite Visible spectrum |
| Zdroj: | Russian Journal of Applied Chemistry. 92:113-121 |
| ISSN: | 1608-3296 1070-4272 |
| DOI: | 10.1134/s10704272190100166 |
| Popis: | Single-phase hollow bismuth ferrite microspheres ∼1 µm in diameter were synthesized by ultrasonic spray pyrolysis in a stream of air or argon. All the samples exhibited photocatalytic activity exceeding that of the standard TiO2 catalyst under UV irradiation. The samples synthesized in an argon stream exhibit catalytic activity under irradiation with a blue light. A comprehensive study showed that the appearance of the catalytic activity under the action of visible light was not associated with the powder particle morphology, oxygen defectiveness, and a change in the band gap width. An X-ray photoelectron spectroscopic study revealed decreased content of adsorbed oxygen on the surface of BiFeO3 synthesized in an argon stream. Possible mechanisms responsible for the appearance of the photocatalytic activity in the visible range are discussed. |
| Databáze: | OpenAIRE |
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