Metal chalcogenides (CuS or MoS2)-modified TiO2 as highly efficient bifunctional photocatalyst nanocomposites for green H2 generation and dye degradation
Abstract Herein, we report the modification of TiO2 nanostructures with two different metal chalcogenides (CuS or MoS2). The effect of the preparation scheme (hydrothermal and coprecipitation methods) and the mass ratio of metal chalcogenides were investigated. The as-synthesized photocatalyst nanoc...
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Nature Portfolio
2023-05-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-023-34743-2 |
| _version_ | 1797822904539283456 |
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| author | Reem A. El-Gendy Haitham M. El-Bery Mostafa Farrag Dina M. Fouad |
| author_facet | Reem A. El-Gendy Haitham M. El-Bery Mostafa Farrag Dina M. Fouad |
| author_sort | Reem A. El-Gendy |
| collection | DOAJ |
| description | Abstract Herein, we report the modification of TiO2 nanostructures with two different metal chalcogenides (CuS or MoS2). The effect of the preparation scheme (hydrothermal and coprecipitation methods) and the mass ratio of metal chalcogenides were investigated. The as-synthesized photocatalyst nanocomposites were fully characterized by various techniques. Moreover, the photo/electrochemical analysis were performed to investigate the photoelectric properties and photocatalytic mechanism. The photocatalytic performance was evaluated using two test reactions. In the case of H2 generation via water splitting, it was found that 0.5 wt% CuS-TiO2 synthesized via the coprecipitation method exhibited an initial hydrogen evolution rate (HER) of 2.95 mmol h−1 g−1. While, the optimized 3 wt% MoS2-TiO2 synthesized by the hydrothermal method, showed an HER of 1.7 mmol h−1 g−1. Moreover, the degradation efficiency of methylene blue dye was 98% under UV–Vis light irradiation within 2 h over 0.5 CT_PP and 3MT_HT. Under visible irradiation, the degradation efficiency was 100% and 96% for 3MT_PP and 0.5CT_HT in the presence of H2O2, respectively. This study has proven that metal chalcogenides can act as effective, stable, and low-cost bifunctional co-catalysts to enhance the overall photocatalytic performance. |
| first_indexed | 2024-03-13T10:16:06Z |
| format | Article |
| id | doaj.art-c4b34cc2761e4f0aba0f979d97a94b65 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-03-13T10:16:06Z |
| publishDate | 2023-05-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-c4b34cc2761e4f0aba0f979d97a94b652023-05-21T11:15:02ZengNature PortfolioScientific Reports2045-23222023-05-0113111510.1038/s41598-023-34743-2Metal chalcogenides (CuS or MoS2)-modified TiO2 as highly efficient bifunctional photocatalyst nanocomposites for green H2 generation and dye degradationReem A. El-Gendy0Haitham M. El-Bery1Mostafa Farrag2Dina M. Fouad3Advanced Multifunctional Materials Laboratory, Chemistry Department, Faculty of Science, Assiut UniversityAdvanced Multifunctional Materials Laboratory, Chemistry Department, Faculty of Science, Assiut UniversityDepartment of Chemistry, Faculty of Science, Assiut UniversityDepartment of Chemistry, Faculty of Science, Assiut UniversityAbstract Herein, we report the modification of TiO2 nanostructures with two different metal chalcogenides (CuS or MoS2). The effect of the preparation scheme (hydrothermal and coprecipitation methods) and the mass ratio of metal chalcogenides were investigated. The as-synthesized photocatalyst nanocomposites were fully characterized by various techniques. Moreover, the photo/electrochemical analysis were performed to investigate the photoelectric properties and photocatalytic mechanism. The photocatalytic performance was evaluated using two test reactions. In the case of H2 generation via water splitting, it was found that 0.5 wt% CuS-TiO2 synthesized via the coprecipitation method exhibited an initial hydrogen evolution rate (HER) of 2.95 mmol h−1 g−1. While, the optimized 3 wt% MoS2-TiO2 synthesized by the hydrothermal method, showed an HER of 1.7 mmol h−1 g−1. Moreover, the degradation efficiency of methylene blue dye was 98% under UV–Vis light irradiation within 2 h over 0.5 CT_PP and 3MT_HT. Under visible irradiation, the degradation efficiency was 100% and 96% for 3MT_PP and 0.5CT_HT in the presence of H2O2, respectively. This study has proven that metal chalcogenides can act as effective, stable, and low-cost bifunctional co-catalysts to enhance the overall photocatalytic performance.https://doi.org/10.1038/s41598-023-34743-2 |
| spellingShingle | Reem A. El-Gendy Haitham M. El-Bery Mostafa Farrag Dina M. Fouad Metal chalcogenides (CuS or MoS2)-modified TiO2 as highly efficient bifunctional photocatalyst nanocomposites for green H2 generation and dye degradation Scientific Reports |
| title | Metal chalcogenides (CuS or MoS2)-modified TiO2 as highly efficient bifunctional photocatalyst nanocomposites for green H2 generation and dye degradation |
| title_full | Metal chalcogenides (CuS or MoS2)-modified TiO2 as highly efficient bifunctional photocatalyst nanocomposites for green H2 generation and dye degradation |
| title_fullStr | Metal chalcogenides (CuS or MoS2)-modified TiO2 as highly efficient bifunctional photocatalyst nanocomposites for green H2 generation and dye degradation |
| title_full_unstemmed | Metal chalcogenides (CuS or MoS2)-modified TiO2 as highly efficient bifunctional photocatalyst nanocomposites for green H2 generation and dye degradation |
| title_short | Metal chalcogenides (CuS or MoS2)-modified TiO2 as highly efficient bifunctional photocatalyst nanocomposites for green H2 generation and dye degradation |
| title_sort | metal chalcogenides cus or mos2 modified tio2 as highly efficient bifunctional photocatalyst nanocomposites for green h2 generation and dye degradation |
| url | https://doi.org/10.1038/s41598-023-34743-2 |
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