Influence of rGO and Preparation Method on the Physicochemical and Photocatalytic Properties of TiO<sub>2</sub>/Reduced Graphene Oxide Photocatalysts
In this study, a series of TiO<sub>2</sub>/rGO photocatalysts were obtained with a two-step procedure: a solvothermal method and calcination at 300–900 °C in an argon atmosphere. It was noted that the presence of rGO in photocatalysts had an important role in the changes in crystallite s...
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2021-11-01
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| author | Agnieszka Wanag Ewelina Kusiak-Nejman Adam Czyżewski Dariusz Moszyński Antoni W. Morawski |
| author_facet | Agnieszka Wanag Ewelina Kusiak-Nejman Adam Czyżewski Dariusz Moszyński Antoni W. Morawski |
| author_sort | Agnieszka Wanag |
| collection | DOAJ |
| description | In this study, a series of TiO<sub>2</sub>/rGO photocatalysts were obtained with a two-step procedure: a solvothermal method and calcination at 300–900 °C in an argon atmosphere. It was noted that the presence of rGO in photocatalysts had an important role in the changes in crystallite size and specific surface area. In TiO<sub>2</sub>/rGO samples, different surface functional groups, such as C−C<sub>graph,</sub> C−C<sub>aliph,</sub> C−OH, C=O, and CO(O), were found. It was observed that rGO modification suppressed the anatase-to-rutile phase transformation. The photocatalytic activity of the obtained nanomaterials was investigated through the decomposition of methylene blue under UV and artificial solar light irradiation. It was found that the adsorption degree played an important role in methylene blue decomposition. The experimental results revealed that TiO<sub>2</sub>/rGO samples exhibited superior removal efficiency after calcination for methylene blue compared toTiO<sub>2</sub> without rGO, as well as a commercial photocatalyst KRONOClean 7000. It was noted that photocatalytic activity increased with the increase in the calcination temperature. The highest activity was observed for the sample calcined at 700 °C, which consisted of 76% anatase and 24% rutile. This study clearly demonstrated that TiO<sub>2</sub>/rGO samples calcined in argon can be used as efficient photocatalysts for the application of methylene blue decomposition. |
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| last_indexed | 2024-03-10T05:38:13Z |
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| spelling | doaj.art-5220a404ff7f475ca1eec1c1b36fa0da2023-11-22T22:45:38ZengMDPI AGCatalysts2073-43442021-11-011111133310.3390/catal11111333Influence of rGO and Preparation Method on the Physicochemical and Photocatalytic Properties of TiO<sub>2</sub>/Reduced Graphene Oxide PhotocatalystsAgnieszka Wanag0Ewelina Kusiak-Nejman1Adam Czyżewski2Dariusz Moszyński3Antoni W. Morawski4Department of Inorganic Chemical Technology and Environment Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Pułaskiego 10, 70-322 Szczecin, PolandDepartment of Inorganic Chemical Technology and Environment Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Pułaskiego 10, 70-322 Szczecin, PolandDepartment of Inorganic Chemical Technology and Environment Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Pułaskiego 10, 70-322 Szczecin, PolandDepartment of Inorganic Chemical Technology and Environment Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Pułaskiego 10, 70-322 Szczecin, PolandDepartment of Inorganic Chemical Technology and Environment Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Pułaskiego 10, 70-322 Szczecin, PolandIn this study, a series of TiO<sub>2</sub>/rGO photocatalysts were obtained with a two-step procedure: a solvothermal method and calcination at 300–900 °C in an argon atmosphere. It was noted that the presence of rGO in photocatalysts had an important role in the changes in crystallite size and specific surface area. In TiO<sub>2</sub>/rGO samples, different surface functional groups, such as C−C<sub>graph,</sub> C−C<sub>aliph,</sub> C−OH, C=O, and CO(O), were found. It was observed that rGO modification suppressed the anatase-to-rutile phase transformation. The photocatalytic activity of the obtained nanomaterials was investigated through the decomposition of methylene blue under UV and artificial solar light irradiation. It was found that the adsorption degree played an important role in methylene blue decomposition. The experimental results revealed that TiO<sub>2</sub>/rGO samples exhibited superior removal efficiency after calcination for methylene blue compared toTiO<sub>2</sub> without rGO, as well as a commercial photocatalyst KRONOClean 7000. It was noted that photocatalytic activity increased with the increase in the calcination temperature. The highest activity was observed for the sample calcined at 700 °C, which consisted of 76% anatase and 24% rutile. This study clearly demonstrated that TiO<sub>2</sub>/rGO samples calcined in argon can be used as efficient photocatalysts for the application of methylene blue decomposition.https://www.mdpi.com/2073-4344/11/11/1333photocatalysisTiO<sub>2</sub>reduced graphene oxidesolvothermal and calcination methodadsorptionUV and artificial solar light |
| spellingShingle | Agnieszka Wanag Ewelina Kusiak-Nejman Adam Czyżewski Dariusz Moszyński Antoni W. Morawski Influence of rGO and Preparation Method on the Physicochemical and Photocatalytic Properties of TiO<sub>2</sub>/Reduced Graphene Oxide Photocatalysts Catalysts photocatalysis TiO<sub>2</sub> reduced graphene oxide solvothermal and calcination method adsorption UV and artificial solar light |
| title | Influence of rGO and Preparation Method on the Physicochemical and Photocatalytic Properties of TiO<sub>2</sub>/Reduced Graphene Oxide Photocatalysts |
| title_full | Influence of rGO and Preparation Method on the Physicochemical and Photocatalytic Properties of TiO<sub>2</sub>/Reduced Graphene Oxide Photocatalysts |
| title_fullStr | Influence of rGO and Preparation Method on the Physicochemical and Photocatalytic Properties of TiO<sub>2</sub>/Reduced Graphene Oxide Photocatalysts |
| title_full_unstemmed | Influence of rGO and Preparation Method on the Physicochemical and Photocatalytic Properties of TiO<sub>2</sub>/Reduced Graphene Oxide Photocatalysts |
| title_short | Influence of rGO and Preparation Method on the Physicochemical and Photocatalytic Properties of TiO<sub>2</sub>/Reduced Graphene Oxide Photocatalysts |
| title_sort | influence of rgo and preparation method on the physicochemical and photocatalytic properties of tio sub 2 sub reduced graphene oxide photocatalysts |
| topic | photocatalysis TiO<sub>2</sub> reduced graphene oxide solvothermal and calcination method adsorption UV and artificial solar light |
| url | https://www.mdpi.com/2073-4344/11/11/1333 |
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