Broadening the Action Spectrum of TiO<sub>2</sub>-Based Photocatalysts to Visible Region by Substituting Platinum with Copper
In this study, TiO<sub>2</sub>-based photocatalysts modified with Pt and Cu/CuO<sub>x</sub> were synthesized and studied in the photocatalytic reduction of CO<sub>2</sub>. The morphology and chemical states of synthesized photocatalysts were studied using UV-Vis d...
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MDPI AG
2022-05-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/9/1584 |
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| author | Andrey A. Saraev Anna Yu. Kurenkova Evgeny Yu. Gerasimov Ekaterina A. Kozlova |
| author_facet | Andrey A. Saraev Anna Yu. Kurenkova Evgeny Yu. Gerasimov Ekaterina A. Kozlova |
| author_sort | Andrey A. Saraev |
| collection | DOAJ |
| description | In this study, TiO<sub>2</sub>-based photocatalysts modified with Pt and Cu/CuO<sub>x</sub> were synthesized and studied in the photocatalytic reduction of CO<sub>2</sub>. The morphology and chemical states of synthesized photocatalysts were studied using UV-Vis diffuse reflectance spectroscopy, high-resolution transmission electron microscopy, and X-ray photoelectron spectroscopy. A series of light-emitting diodes (LEDs) with maximum intensity in the range of 365–450 nm was used to determine the action spectrum of photocatalysts. It is shown for, the first time, that the pre-calcination of TiO<sub>2</sub> at 700 °C and the use of Cu/CuO<sub>x</sub> instead of Pt allow one to design a highly efficient photocatalyst for CO<sub>2</sub> transformation shifting the working range to the visible light (425 nm). Cu/CuO<sub>x</sub>/TiO<sub>2</sub> (calcined at 700 °C) shows a rate of CH<sub>4</sub> formation of 1.2 ± 0.1 µmol h<sup>−1</sup> g<sup>−1</sup> and an overall CO<sub>2</sub> reduction rate of 11 ± 1 µmol h<sup>−1</sup> g<sup>−1</sup> (at 425 nm). |
| first_indexed | 2024-03-10T03:51:53Z |
| format | Article |
| id | doaj.art-a9400c240e4d4390bb12d0365bc9d67a |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T03:51:53Z |
| publishDate | 2022-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-a9400c240e4d4390bb12d0365bc9d67a2023-11-23T08:56:27ZengMDPI AGNanomaterials2079-49912022-05-01129158410.3390/nano12091584Broadening the Action Spectrum of TiO<sub>2</sub>-Based Photocatalysts to Visible Region by Substituting Platinum with CopperAndrey A. Saraev0Anna Yu. Kurenkova1Evgeny Yu. Gerasimov2Ekaterina A. Kozlova3Federal Research Center, Boreskov Institute of Catalysis SB RAS, Lavrentieva Ave. 5, 630090 Novosibirsk, RussiaFederal Research Center, Boreskov Institute of Catalysis SB RAS, Lavrentieva Ave. 5, 630090 Novosibirsk, RussiaFederal Research Center, Boreskov Institute of Catalysis SB RAS, Lavrentieva Ave. 5, 630090 Novosibirsk, RussiaFederal Research Center, Boreskov Institute of Catalysis SB RAS, Lavrentieva Ave. 5, 630090 Novosibirsk, RussiaIn this study, TiO<sub>2</sub>-based photocatalysts modified with Pt and Cu/CuO<sub>x</sub> were synthesized and studied in the photocatalytic reduction of CO<sub>2</sub>. The morphology and chemical states of synthesized photocatalysts were studied using UV-Vis diffuse reflectance spectroscopy, high-resolution transmission electron microscopy, and X-ray photoelectron spectroscopy. A series of light-emitting diodes (LEDs) with maximum intensity in the range of 365–450 nm was used to determine the action spectrum of photocatalysts. It is shown for, the first time, that the pre-calcination of TiO<sub>2</sub> at 700 °C and the use of Cu/CuO<sub>x</sub> instead of Pt allow one to design a highly efficient photocatalyst for CO<sub>2</sub> transformation shifting the working range to the visible light (425 nm). Cu/CuO<sub>x</sub>/TiO<sub>2</sub> (calcined at 700 °C) shows a rate of CH<sub>4</sub> formation of 1.2 ± 0.1 µmol h<sup>−1</sup> g<sup>−1</sup> and an overall CO<sub>2</sub> reduction rate of 11 ± 1 µmol h<sup>−1</sup> g<sup>−1</sup> (at 425 nm).https://www.mdpi.com/2079-4991/12/9/1584photocatalysisCO<sub>2</sub> reductionTiO<sub>2</sub>CH<sub>4</sub> productionvisible lightultraviolet light |
| spellingShingle | Andrey A. Saraev Anna Yu. Kurenkova Evgeny Yu. Gerasimov Ekaterina A. Kozlova Broadening the Action Spectrum of TiO<sub>2</sub>-Based Photocatalysts to Visible Region by Substituting Platinum with Copper Nanomaterials photocatalysis CO<sub>2</sub> reduction TiO<sub>2</sub> CH<sub>4</sub> production visible light ultraviolet light |
| title | Broadening the Action Spectrum of TiO<sub>2</sub>-Based Photocatalysts to Visible Region by Substituting Platinum with Copper |
| title_full | Broadening the Action Spectrum of TiO<sub>2</sub>-Based Photocatalysts to Visible Region by Substituting Platinum with Copper |
| title_fullStr | Broadening the Action Spectrum of TiO<sub>2</sub>-Based Photocatalysts to Visible Region by Substituting Platinum with Copper |
| title_full_unstemmed | Broadening the Action Spectrum of TiO<sub>2</sub>-Based Photocatalysts to Visible Region by Substituting Platinum with Copper |
| title_short | Broadening the Action Spectrum of TiO<sub>2</sub>-Based Photocatalysts to Visible Region by Substituting Platinum with Copper |
| title_sort | broadening the action spectrum of tio sub 2 sub based photocatalysts to visible region by substituting platinum with copper |
| topic | photocatalysis CO<sub>2</sub> reduction TiO<sub>2</sub> CH<sub>4</sub> production visible light ultraviolet light |
| url | https://www.mdpi.com/2079-4991/12/9/1584 |
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