Bimetallic metal–organic frameworks-derived mesoporous CdxZn1−xS polyhedrons for enhanced photocatalytic hydrogen evolution
| Autor: | Shijian Zhou, Jian Wang, Yan Kong, Yun Wang, Feihu Mu |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
010405 organic chemistry Mechanical Engineering Sulfidation 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Metal Chemical engineering Mechanics of Materials visual_art visual_art.visual_art_medium Photocatalysis General Materials Science Metal-organic framework Hydrogen evolution 0210 nano-technology Mesoporous material Bimetallic strip Conduction band |
| Zdroj: | Journal of Materials Research. 34:1773-1784 |
| ISSN: | 2044-5326 0884-2914 |
| Popis: | A bimetallic metal-organic frameworks (MOFs)-templated strategy was developed to fabricate mesoporous CdxZn1−xS polyhedrons with improved photocatalytic hydrogen evolution activity, and the formation mechanism of these mesoporous polyhedrons was discussed in detail. Incorporating Cd atoms, the Brunauer–Emmett–Teller surface areas of mesoporous CdxZn1−xS polyhedrons were significantly increased (271 m2/g), providing more exposed active sites compared with ZnS. In addition, suitable conduction band potential (< −0.55 eV) of the mesoporous CdxZn1−xS polyhedrons was also beneficial for the photocatalysis. Impressively, by the co-effects of mesoporous structure and modified conduction band, the mesoporous CdxZn1−xS polyhedrons exhibited better photocatalytic activity for hydrogen evolution than most reported photocatalysts without noble metals. The maximum hydrogen evolution rate of the CSZ3 reached 4.10 mmol/(h g) under visible-light irradiation and without any cocatalyst condition. This facile strategy for the construction of mesoporous CdxZn1−xS polyhedrons provided a deep insight to fabricate other metal sulfides for a variety of photochemical applications. |
| Databáze: | OpenAIRE |
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