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Towards the improvement of methane production in CO2 photoreduction using Bi2WO6/TiO2 heterostructures
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David P. Serrano,
Víctor A. de la Peña O’Shea
Applied Catalysis B: Environmental, Volume: 324, Start page: 122206
Swansea University Author:
James Durrant
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DOI (Published version): 10.1016/j.apcatb.2022.122206
Abstract
Russelite bismuth tungstate (Bi2WO6) has been widely reported for the photocatalytic degradation and mineralization of a myriad of pollutants as well as organic compounds. These materials present perovskite-like structure with hierarchical morphologies, which confers excellent optoelectronic propert...
| Published in: | Applied Catalysis B: Environmental |
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| ISSN: | 0926-3373 |
| Published: |
Elsevier BV
2023
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| Online Access: |
Check full text
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa62022 |
| Abstract: |
Russelite bismuth tungstate (Bi2WO6) has been widely reported for the photocatalytic degradation and mineralization of a myriad of pollutants as well as organic compounds. These materials present perovskite-like structure with hierarchical morphologies, which confers excellent optoelectronic properties as potentials candidates for photocatalytic solar fuels production. Here, we propose the development of Bi2WO6/TiO2 heterojunctions for CO2 photoreduction, as a promising solution to produce fuels, alleviate global warming and tackle fossil fuel shortage. Our results show an improvement of the photocatalytic activity of the heterojunctions compared to the pristine semiconductors. Near Ambient Pressure X-ray Photoelectron Spectroscopy (NAP-XPS) experiments reveals a preferential CO2 adsorption over TiO2. On the other hand, transient absorption spectroscopy measurements show that the charge transfer pathway in Bi2WO6/TiO2 hybrids leads to longer-lived photogenerated carriers in spatially separated redox active sites, which favour the reduction of CO2 into highly electron demanding fuels and chemicals, such as CH4 and C2H6. |
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| Keywords: |
CO2 photoreduction; Bi2WO6/TiO2 heterojunction; CH4 production; Charge dynamics studies |
| College: |
Faculty of Science and Engineering |
| Funders: |
Financial support has been received from the European Research Council (ERC), through HYMAP project (grant agreement No. 648319), under the European Union’s Horizon 2020 research and innovation program, as well as from the Marie Sklodowska-Curie grant agreement No. 754382. L.C. acknowledges funding from the project ARMONIA (PID2020–119125RJ-I00) funded by MCIN/AEI/10.13039/501100011033. Financial support has also been received from AEI-MINECO/FEDER (Nympha Project, PID2019–106315RB-I00), “Comunidad de Madrid” regional government, and the European Structural Funds (FotoArt-CM project, S2018/NMT-4367). Authors also acknowledge financial support from the grant PLEC2021–007906 funded by MCIN/AEI/10.13039/501100011033 and the “European Union NextGenerationEU/PRTR”. |
| Start Page: |
122206 |