Defective Grey TiO<sub>2</sub> with Minuscule Anatase–Rutile Heterophase Junctions for Hydroxyl Radicals Formation in a Visible Light-Triggered Photocatalysis
The novelty of this work was to prepare a series of defect-rich colored TiO<sub>2</sub> nanostructures, using a peroxo solvothermal-assisted, high-pressure nitrogenation method. Among these solids, certain TiO<sub>2</sub> materials possessed a trace quantity of anatase–rutile...
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MDPI AG
2021-12-01
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| Series: | Catalysts |
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| Online Access: | https://www.mdpi.com/2073-4344/11/12/1500 |
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| author | Sanjay Gopal Ullattil Janez Zavašnik Ksenija Maver Matjaž Finšgar Nataša Novak Tušar Albin Pintar |
| author_facet | Sanjay Gopal Ullattil Janez Zavašnik Ksenija Maver Matjaž Finšgar Nataša Novak Tušar Albin Pintar |
| author_sort | Sanjay Gopal Ullattil |
| collection | DOAJ |
| description | The novelty of this work was to prepare a series of defect-rich colored TiO<sub>2</sub> nanostructures, using a peroxo solvothermal-assisted, high-pressure nitrogenation method. Among these solids, certain TiO<sub>2</sub> materials possessed a trace quantity of anatase–rutile heterojunctions, which are beneficial in obtaining high reaction rates in photocatalytic reactions. In addition, high surface area (above 100 m<sup>2</sup>/g), even when utilizing a high calcination temperature (500 °C), and absorption of light at higher wavelengths, due to the grey color of the synthesized titania, were observed as an added advantage for photocatalytic hydroxyl radical formation. In this work, we adopted a photoluminescent probe method to monitor the temporal evolution of hydroxyl radicals. As a result, promising hydroxyl radical formations were observed for all the colored samples synthesized at 400 and 500 °C, irrespective of the duration of calcination. |
| first_indexed | 2024-03-10T04:27:04Z |
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| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-10T04:27:04Z |
| publishDate | 2021-12-01 |
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| spelling | doaj.art-ba20e6dee39b4502a5a1970b7893b9602023-11-23T07:34:32ZengMDPI AGCatalysts2073-43442021-12-011112150010.3390/catal11121500Defective Grey TiO<sub>2</sub> with Minuscule Anatase–Rutile Heterophase Junctions for Hydroxyl Radicals Formation in a Visible Light-Triggered PhotocatalysisSanjay Gopal Ullattil0Janez Zavašnik1Ksenija Maver2Matjaž Finšgar3Nataša Novak Tušar4Albin Pintar5Laboratory for Environmental Sciences and Engineering, Department of Inorganic Chemistry and Technology, National Institute of Chemistry, Hajdrihova 19, SI-1001 Ljubljana, SloveniaDepartment for Gaseous Electronics, Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, SloveniaLaboratory for Environmental Sciences and Engineering, Department of Inorganic Chemistry and Technology, National Institute of Chemistry, Hajdrihova 19, SI-1001 Ljubljana, SloveniaFaculty of Chemistry and Chemical Engineering, University of Maribor, Smetanova 17, SI-2000 Maribor, SloveniaLaboratory for Environmental Sciences and Engineering, Department of Inorganic Chemistry and Technology, National Institute of Chemistry, Hajdrihova 19, SI-1001 Ljubljana, SloveniaLaboratory for Environmental Sciences and Engineering, Department of Inorganic Chemistry and Technology, National Institute of Chemistry, Hajdrihova 19, SI-1001 Ljubljana, SloveniaThe novelty of this work was to prepare a series of defect-rich colored TiO<sub>2</sub> nanostructures, using a peroxo solvothermal-assisted, high-pressure nitrogenation method. Among these solids, certain TiO<sub>2</sub> materials possessed a trace quantity of anatase–rutile heterojunctions, which are beneficial in obtaining high reaction rates in photocatalytic reactions. In addition, high surface area (above 100 m<sup>2</sup>/g), even when utilizing a high calcination temperature (500 °C), and absorption of light at higher wavelengths, due to the grey color of the synthesized titania, were observed as an added advantage for photocatalytic hydroxyl radical formation. In this work, we adopted a photoluminescent probe method to monitor the temporal evolution of hydroxyl radicals. As a result, promising hydroxyl radical formations were observed for all the colored samples synthesized at 400 and 500 °C, irrespective of the duration of calcination.https://www.mdpi.com/2073-4344/11/12/1500grey titaniaanatase–rutile heterojunctionsperoxo solvothermal-assistedhigh-pressure nitrogenationphotoluminescence probe methodhydroxyl radical generation |
| spellingShingle | Sanjay Gopal Ullattil Janez Zavašnik Ksenija Maver Matjaž Finšgar Nataša Novak Tušar Albin Pintar Defective Grey TiO<sub>2</sub> with Minuscule Anatase–Rutile Heterophase Junctions for Hydroxyl Radicals Formation in a Visible Light-Triggered Photocatalysis Catalysts grey titania anatase–rutile heterojunctions peroxo solvothermal-assisted high-pressure nitrogenation photoluminescence probe method hydroxyl radical generation |
| title | Defective Grey TiO<sub>2</sub> with Minuscule Anatase–Rutile Heterophase Junctions for Hydroxyl Radicals Formation in a Visible Light-Triggered Photocatalysis |
| title_full | Defective Grey TiO<sub>2</sub> with Minuscule Anatase–Rutile Heterophase Junctions for Hydroxyl Radicals Formation in a Visible Light-Triggered Photocatalysis |
| title_fullStr | Defective Grey TiO<sub>2</sub> with Minuscule Anatase–Rutile Heterophase Junctions for Hydroxyl Radicals Formation in a Visible Light-Triggered Photocatalysis |
| title_full_unstemmed | Defective Grey TiO<sub>2</sub> with Minuscule Anatase–Rutile Heterophase Junctions for Hydroxyl Radicals Formation in a Visible Light-Triggered Photocatalysis |
| title_short | Defective Grey TiO<sub>2</sub> with Minuscule Anatase–Rutile Heterophase Junctions for Hydroxyl Radicals Formation in a Visible Light-Triggered Photocatalysis |
| title_sort | defective grey tio sub 2 sub with minuscule anatase rutile heterophase junctions for hydroxyl radicals formation in a visible light triggered photocatalysis |
| topic | grey titania anatase–rutile heterojunctions peroxo solvothermal-assisted high-pressure nitrogenation photoluminescence probe method hydroxyl radical generation |
| url | https://www.mdpi.com/2073-4344/11/12/1500 |
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