| Title: | "Visible-Light-Active N-Doped TiO(2) Photocatalysts: Synthesis from TiOSO(4), Characterization, and Enhancement of Stability Via Surface Modification" |
| Author(s): | Kovalevskiy N; Svintsitskiy D; Cherepanova S; Yakushkin S; Martyanov O; Selishcheva S; Gribov E; Kozlov D; Selishchev D; |
| Address: | "Department of Unconventional Catalytic Processes, Boreskov Institute of Catalysis, Novosibirsk 630090, Russia. Department of Heterogeneous Catalysis, Boreskov Institute of Catalysis, Novosibirsk 630090, Russia. Department of Physicochemical Methods of Research, Boreskov Institute of Catalysis, Novosibirsk 630090, Russia. Engineering Center, Boreskov Institute of Catalysis, Novosibirsk 630090, Russia" |
| ISSN/ISBN: | 2079-4991 (Print) 2079-4991 (Electronic) 2079-4991 (Linking) |
| Abstract: | "This paper describes the chemical engineering aspects for the preparation of highly active and stable nanocomposite photocatalysts based on N-doped TiO(2). The synthesis is performed using titanium oxysulfate as a low-cost inorganic precursor and ammonia as a precipitating agent, as well as a source of nitrogen. Mixing the reagents under a control of pH leads to an amorphous titanium oxide hydrate, which can be further successfully converted to nanocrystalline anatase TiO(2) through calcination in air at an increased temperature. The as-prepared N-doped TiO(2) provides the complete oxidation of volatile organic compounds both under UV and visible light, and the action spectrum of N-doped TiO(2) correlates to its absorption spectrum. The key role of paramagnetic nitrogen species in the absorption of visible light and in the visible-light-activity of N-doped TiO(2) is shown using the EPR technique. Surface modification of N-doped TiO(2) with copper species prevents its intense deactivation under highly powerful radiation and results in a nanocomposite photocatalyst with enhanced activity and stability. The photocatalysts prepared under different conditions are discussed regarding the effects of their characteristics on photocatalytic activity under UV and visible light" |
| Keywords: | Epr N-doped TiO2 action spectrum copper (Cu) nanocomposite photocatalytic oxidation stability visible light; |
| Notes: | "PubMed-not-MEDLINEKovalevskiy, Nikita Svintsitskiy, Dmitry Cherepanova, Svetlana Yakushkin, Stanislav Martyanov, Oleg Selishcheva, Svetlana Gribov, Evgeny Kozlov, Denis Selishchev, Dmitry eng 20-73-10135/Russian Science Foundation/ Switzerland 2022/12/12 Nanomaterials (Basel). 2022 Nov 23; 12(23):4146. doi: 10.3390/nano12234146" |
