Heterojunction Design between WSe<sub>2</sub> Nanosheets and TiO<sub>2</sub> for Efficient Photocatalytic Hydrogen Generation
Design and fabrication of efficient and stable photocatalysts are critically required for practical applications of solar water splitting. Herein, a series of WSe<sub>2</sub>/TiO<sub>2</sub> nanocomposites were constructed through a facile mechanical grinding method, and all...
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MDPI AG
2022-12-01
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| Online Access: | https://www.mdpi.com/2073-4344/12/12/1668 |
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| author | Xu Guo Xing Liu Jing Shan Guangtao Zhao Shengzhong (Frank) Liu |
| author_facet | Xu Guo Xing Liu Jing Shan Guangtao Zhao Shengzhong (Frank) Liu |
| author_sort | Xu Guo |
| collection | DOAJ |
| description | Design and fabrication of efficient and stable photocatalysts are critically required for practical applications of solar water splitting. Herein, a series of WSe<sub>2</sub>/TiO<sub>2</sub> nanocomposites were constructed through a facile mechanical grinding method, and all of the nanocomposites exhibited boosted photocatalytic hydrogen evolution. It was discovered that the enhanced photocatalytic performance was attributed to the efficient electron transfer from TiO<sub>2</sub> to WSe<sub>2</sub> and the abundant active sites provided by WSe<sub>2</sub> nanosheets. Moreover, the intimate heterojunction between WSe<sub>2</sub> nanosheets and TiO<sub>2</sub> favors the interfacial charge separation. As a result, a highest hydrogen evolution rate of 2.28 mmol/g·h, 114 times higher than pristine TiO<sub>2</sub>, was obtained when the weight ratio of WSe<sub>2</sub>/(WSe<sub>2</sub> + TiO<sub>2</sub>) was adjusted to be 20%. The designed WSe<sub>2</sub>/TiO<sub>2</sub> heterojunctions can be regarded as a promising photocatalysts for high-throughput hydrogen production. |
| first_indexed | 2024-03-09T17:13:37Z |
| format | Article |
| id | doaj.art-b6ff387a9d2c474ea079f7120b43690e |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-09T17:13:37Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
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| spelling | doaj.art-b6ff387a9d2c474ea079f7120b43690e2023-11-24T13:52:59ZengMDPI AGCatalysts2073-43442022-12-011212166810.3390/catal12121668Heterojunction Design between WSe<sub>2</sub> Nanosheets and TiO<sub>2</sub> for Efficient Photocatalytic Hydrogen GenerationXu Guo0Xing Liu1Jing Shan2Guangtao Zhao3Shengzhong (Frank) Liu4Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710119, ChinaShaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710119, ChinaShaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710119, ChinaShaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710119, ChinaShaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710119, ChinaDesign and fabrication of efficient and stable photocatalysts are critically required for practical applications of solar water splitting. Herein, a series of WSe<sub>2</sub>/TiO<sub>2</sub> nanocomposites were constructed through a facile mechanical grinding method, and all of the nanocomposites exhibited boosted photocatalytic hydrogen evolution. It was discovered that the enhanced photocatalytic performance was attributed to the efficient electron transfer from TiO<sub>2</sub> to WSe<sub>2</sub> and the abundant active sites provided by WSe<sub>2</sub> nanosheets. Moreover, the intimate heterojunction between WSe<sub>2</sub> nanosheets and TiO<sub>2</sub> favors the interfacial charge separation. As a result, a highest hydrogen evolution rate of 2.28 mmol/g·h, 114 times higher than pristine TiO<sub>2</sub>, was obtained when the weight ratio of WSe<sub>2</sub>/(WSe<sub>2</sub> + TiO<sub>2</sub>) was adjusted to be 20%. The designed WSe<sub>2</sub>/TiO<sub>2</sub> heterojunctions can be regarded as a promising photocatalysts for high-throughput hydrogen production.https://www.mdpi.com/2073-4344/12/12/1668photocatalystsWSe<sub>2</sub> nanosheetsTiO<sub>2</sub>nanocompositeshydrogen |
| spellingShingle | Xu Guo Xing Liu Jing Shan Guangtao Zhao Shengzhong (Frank) Liu Heterojunction Design between WSe<sub>2</sub> Nanosheets and TiO<sub>2</sub> for Efficient Photocatalytic Hydrogen Generation Catalysts photocatalysts WSe<sub>2</sub> nanosheets TiO<sub>2</sub> nanocomposites hydrogen |
| title | Heterojunction Design between WSe<sub>2</sub> Nanosheets and TiO<sub>2</sub> for Efficient Photocatalytic Hydrogen Generation |
| title_full | Heterojunction Design between WSe<sub>2</sub> Nanosheets and TiO<sub>2</sub> for Efficient Photocatalytic Hydrogen Generation |
| title_fullStr | Heterojunction Design between WSe<sub>2</sub> Nanosheets and TiO<sub>2</sub> for Efficient Photocatalytic Hydrogen Generation |
| title_full_unstemmed | Heterojunction Design between WSe<sub>2</sub> Nanosheets and TiO<sub>2</sub> for Efficient Photocatalytic Hydrogen Generation |
| title_short | Heterojunction Design between WSe<sub>2</sub> Nanosheets and TiO<sub>2</sub> for Efficient Photocatalytic Hydrogen Generation |
| title_sort | heterojunction design between wse sub 2 sub nanosheets and tio sub 2 sub for efficient photocatalytic hydrogen generation |
| topic | photocatalysts WSe<sub>2</sub> nanosheets TiO<sub>2</sub> nanocomposites hydrogen |
| url | https://www.mdpi.com/2073-4344/12/12/1668 |
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