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
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oai:doaj.org-article:5220a404ff7f475ca1eec1c1b36fa0da2021-11-25T17:05:59ZInfluence of rGO and Preparation Method on the Physicochemical and Photocatalytic Properties of TiO<sub>2</sub>/Reduced Graphene Oxide Photocatalysts10.3390/catal111113332073-4344https://doaj.org/article/5220a404ff7f475ca1eec1c1b36fa0da2021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4344/11/11/1333https://doaj.org/toc/2073-4344In 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.Agnieszka WanagEwelina Kusiak-NejmanAdam CzyżewskiDariusz MoszyńskiAntoni W. MorawskiMDPI AGarticlephotocatalysisTiO<sub>2</sub>reduced graphene oxidesolvothermal and calcination methodadsorptionUV and artificial solar lightChemical technologyTP1-1185ChemistryQD1-999ENCatalysts, Vol 11, Iss 1333, p 1333 (2021) |
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| collection |
DOAJ |
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EN |
| topic |
photocatalysis TiO<sub>2</sub> reduced graphene oxide solvothermal and calcination method adsorption UV and artificial solar light Chemical technology TP1-1185 Chemistry QD1-999 |
| spellingShingle |
photocatalysis TiO<sub>2</sub> reduced graphene oxide solvothermal and calcination method adsorption UV and artificial solar light Chemical technology TP1-1185 Chemistry QD1-999 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 |
| 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. |
| format |
article |
| 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 |
| title |
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_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_sort |
influence of rgo and preparation method on the physicochemical and photocatalytic properties of tio<sub>2</sub>/reduced graphene oxide photocatalysts |
| publisher |
MDPI AG |
| publishDate |
2021 |
| url |
https://doaj.org/article/5220a404ff7f475ca1eec1c1b36fa0da |
| work_keys_str_mv |
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