| Title: | Kinetic Aspects of Benzene Degradation over TiO(2)-N and Composite Fe/Bi(2)WO(6)/TiO(2)-N Photocatalysts under Irradiation with Visible Light |
| Author(s): | Lyulyukin M; Kovalevskiy N; Bukhtiyarov A; Kozlov D; Selishchev D; |
| Address: | "Boreskov Institute of Catalysis, Novosibirsk 630090, Russia. Ecology and Nature Management Department, Aircraft Engineering Faculty, Novosibirsk State Technical University, Novosibirsk 630073, Russia" |
| ISSN/ISBN: | 1422-0067 (Electronic) 1422-0067 (Linking) |
| Abstract: | "In this study, composite materials based on nanocrystalline anatase TiO(2) doped with nitrogen and bismuth tungstate are synthesized using a hydrothermal method. All samples are tested in the oxidation of volatile organic compounds under visible light to find the correlations between their physicochemical characteristics and photocatalytic activity. The kinetic aspects are studied both in batch and continuous-flow reactors, using ethanol and benzene as test compounds. The Bi(2)WO(6)/TiO(2)-N heterostructure enhanced with Fe species efficiently utilizes visible light in the blue region and exhibits much higher activity in the degradation of ethanol vapor than pristine TiO(2)-N. However, an increased activity of Fe/Bi(2)WO(6)/TiO(2)-N can have an adverse effect in the degradation of benzene vapor. A temporary deactivation of the photocatalyst can occur at a high concentration of benzene due to the fast accumulation of non-volatile intermediates on its surface. The formed intermediates suppress the adsorption of the initial benzene and substantially increase the time required for its complete removal from the gas phase. An increase in temperature up to 140 degrees C makes it possible to increase the rate of the overall oxidation process, and the use of the Fe/Bi(2)WO(6)/TiO(2)-N composite improves the selectivity of oxidation compared to pristine TiO(2)-N" |
| Keywords: | *Benzene *Light Titanium/chemistry Kinetics Catalysis Bi2WO6 N-doped TiO2 benzene degradation composite photocatalyst photocatalysis thermoactivation visible light; |
| Notes: | "MedlineLyulyukin, Mikhail Kovalevskiy, Nikita Bukhtiyarov, Andrey Kozlov, Denis Selishchev, Dmitry eng 20-73-10135/Russian Science Foundation/ 19-33-60019/Russian Foundation for Basic Research/ Switzerland 2023/03/30 Int J Mol Sci. 2023 Mar 16; 24(6):5693. doi: 10.3390/ijms24065693" |
