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Ostyn NR, Sree SP, Li J, Feng JY, Roeffaers MBJ, De Feyter S, Dendooven J, Detavernier C, Martens JA. Covalent graphite modification by low-temperature photocatalytic oxidation using a titanium dioxide thin film prepared by atomic layer deposition. Catal Sci Technol 2021. [DOI: 10.1039/d1cy00941a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Remote photocatalytic graphite oxidation proceeds efficiently via a transparent titania photocatalyst thin film coating activating the surface with oxygen functional groups.
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Affiliation(s)
- Niels R. Ostyn
- Centre for Surface Chemistry and Catalysis: Characterization and Application Team (COK-KAT), KU Leuven, Celestijnenlaan 200F, box 2461, B-3001 Heverlee, Belgium
| | - Sreeprasanth Pulinthanathu Sree
- Centre for Surface Chemistry and Catalysis: Characterization and Application Team (COK-KAT), KU Leuven, Celestijnenlaan 200F, box 2461, B-3001 Heverlee, Belgium
| | - Jin Li
- Conformal Coating of Nanostructures (CoCooN), Department of Solid State Sciences, Ghent University, Krijgslaan 281/S1, B-9000 Ghent, Belgium
| | - Ji-Yu Feng
- Conformal Coating of Nanostructures (CoCooN), Department of Solid State Sciences, Ghent University, Krijgslaan 281/S1, B-9000 Ghent, Belgium
| | - Maarten B. J. Roeffaers
- Centre for Membrane Separations, Adsorption, Catalysis, and Spectroscopy for Sustainable Solutions (cMACS), KU Leuven, Celestijnenlaan 200F, box 2461, B-3001 Heverlee, Belgium
| | - Steven De Feyter
- Division of Molecular Imaging and Photonics, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Heverlee, Belgium
| | - Jolien Dendooven
- Conformal Coating of Nanostructures (CoCooN), Department of Solid State Sciences, Ghent University, Krijgslaan 281/S1, B-9000 Ghent, Belgium
| | - Christophe Detavernier
- Conformal Coating of Nanostructures (CoCooN), Department of Solid State Sciences, Ghent University, Krijgslaan 281/S1, B-9000 Ghent, Belgium
| | - Johan A. Martens
- Centre for Surface Chemistry and Catalysis: Characterization and Application Team (COK-KAT), KU Leuven, Celestijnenlaan 200F, box 2461, B-3001 Heverlee, Belgium
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Ostyn NR, Steele JA, De Prins M, Sree SP, Chandran CV, Wangermez W, Vanbutsele G, Seo JW, Roeffaers MBJ, Breynaert E, Martens JA. Low-temperature activation of carbon black by selective photocatalytic oxidation. NANOSCALE ADVANCES 2019; 1:2873-2880. [PMID: 36133590 PMCID: PMC9416906 DOI: 10.1039/c9na00188c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Accepted: 05/21/2019] [Indexed: 06/15/2023]
Abstract
Carbon black is chemically modified by selective photocatalytic oxidation, removing amorphous carbon and functionalizing the graphitic fraction to produce porous, graphitized carbon black, commonly used as an adsorbent in chromatography. In contrast to pyrolytic treatments, this photocatalytic modification proceeds under mild reaction conditions using oxygen, nitric oxide, water vapor and a titanium dioxide photocatalyst at 150 °C. The photo-oxidation can be performed both with the photocatalyst in close proximity (contact mode) or physically separated from the carbon. Structural analysis of remotely photo-oxidized carbon black reveals increased hydrophilic properties as compared to pyrolysis at 700 °C in a N2 atmosphere. Carbon black photo-oxidation selectively mineralizes sp3-hybridized carbon, leading to enhanced graphitization. This results in an overall improved structural ordering by enriching carbon black with sp2-hybridized graphitic carbon showing decreased interplanar distance, accompanied by a twofold increase in the specific surface area. In addition, the photo-oxidized material is activated by the presence of oxygen functionalities on the graphitic carbon fraction, further enhancing the adsorptive properties.
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Affiliation(s)
- Niels R Ostyn
- Centre for Surface Chemistry and Catalysis, KU Leuven Celestijnenlaan 200F, box 2461 3001 Heverlee Belgium +32 16 32 16 37
| | - Julian A Steele
- Centre for Surface Chemistry and Catalysis, KU Leuven Celestijnenlaan 200F, box 2461 3001 Heverlee Belgium +32 16 32 16 37
| | - Michiel De Prins
- Centre for Surface Chemistry and Catalysis, KU Leuven Celestijnenlaan 200F, box 2461 3001 Heverlee Belgium +32 16 32 16 37
| | | | - C Vinod Chandran
- Centre for Surface Chemistry and Catalysis, KU Leuven Celestijnenlaan 200F, box 2461 3001 Heverlee Belgium +32 16 32 16 37
| | - Wauter Wangermez
- Centre for Surface Chemistry and Catalysis, KU Leuven Celestijnenlaan 200F, box 2461 3001 Heverlee Belgium +32 16 32 16 37
| | - Gina Vanbutsele
- Centre for Surface Chemistry and Catalysis, KU Leuven Celestijnenlaan 200F, box 2461 3001 Heverlee Belgium +32 16 32 16 37
| | - Jin Won Seo
- Department of Materials Engineering, KU Leuven Kasteelpark Arenberg 44 3001 Heverlee Belgium
| | - Maarten B J Roeffaers
- Centre for Surface Chemistry and Catalysis, KU Leuven Celestijnenlaan 200F, box 2461 3001 Heverlee Belgium +32 16 32 16 37
| | - Eric Breynaert
- Centre for Surface Chemistry and Catalysis, KU Leuven Celestijnenlaan 200F, box 2461 3001 Heverlee Belgium +32 16 32 16 37
| | - Johan A Martens
- Centre for Surface Chemistry and Catalysis, KU Leuven Celestijnenlaan 200F, box 2461 3001 Heverlee Belgium +32 16 32 16 37
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Verbruggen SW. TiO2 photocatalysis for the degradation of pollutants in gas phase: From morphological design to plasmonic enhancement. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2015. [DOI: 10.1016/j.jphotochemrev.2015.07.001] [Citation(s) in RCA: 165] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Caretti I, Keulemans M, Verbruggen SW, Lenaerts S, Van Doorslaer S. Light-Induced Processes in Plasmonic Gold/TiO2 Photocatalysts Studied by Electron Paramagnetic Resonance. Top Catal 2015. [DOI: 10.1007/s11244-015-0419-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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