| Title: | "Synthesis, Characterization and Visible-Light Photocatalytic Activity of Solid and TiO(2)-Supported Uranium Oxycompounds" |
| Author(s): | Lyulyukin M; Filippov T; Cherepanova S; Solovyeva M; Prosvirin I; Bukhtiyarov A; Kozlov D; Selishchev D; |
| Address: | "Department of Unconventional Catalytic Processes, Boreskov Institute of Catalysis, 630090 Novosibirsk, Russia. Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa 32000, Israel. Department of Catalysts Study, Boreskov Institute of Catalysis, 630090 Novosibirsk, Russia. Department of Physicochemical Methods of Research, Boreskov Institute of Catalysis, 630090 Novosibirsk, Russia" |
| ISSN/ISBN: | 2079-4991 (Print) 2079-4991 (Electronic) 2079-4991 (Linking) |
| Abstract: | "In this study, various solid uranium oxycompounds and TiO(2)-supported materials based on nanocrystalline anatase TiO(2) are synthesized using uranyl nitrate hexahydrate as a precursor. All uranium-contained samples are characterized using N(2) adsorption, XRD, UV-vis, Raman, TEM, XPS and tested in the oxidation of a volatile organic compound under visible light of the blue region to find correlations between their physicochemical characteristics and photocatalytic activity. Both uranium oxycompounds and TiO(2)-supported materials are photocatalytically active and are able to completely oxidize gaseous organic compounds under visible light. If compared to the commercial visible-light TiO(2) KRONOS((R)) vlp 7000 photocatalyst used as a benchmark, solid uranium oxycompounds exhibit lower or comparable photocatalytic activity under blue light. At the same time, uranium compounds contained uranyl ion with a uranium charge state of 6+, exhibiting much higher activity than other compounds with a lower charge state of uranium. Immobilization of uranyl ions on the surface of nanocrystalline anatase TiO(2) allows for substantial increase in visible-light activity. The photonic efficiency of reaction over uranyl-grafted TiO(2), 12.2%, is 17 times higher than the efficiency for commercial vlp 7000 photocatalyst. Uranyl-grafted TiO(2) has the potential as a visible-light photocatalyst for special areas of application where there is no strict control for use of uranium compounds (e.g., in spaceships or submarines)" |
| Keywords: | Led VOC oxidation photocatalysis titanium dioxide uranyl nitrate visible light; |
| Notes: | "PubMed-not-MEDLINELyulyukin, Mikhail Filippov, Tikhon Cherepanova, Svetlana Solovyeva, Maria Prosvirin, Igor Bukhtiyarov, Andrey Kozlov, Denis Selishchev, Dmitry eng 20-73-10135/Russian Science Foundation/ Switzerland 2021/05/01 Nanomaterials (Basel). 2021 Apr 19; 11(4):1036. doi: 10.3390/nano11041036" |
