Constructing Anatase TiO2 Nanosheets with Exposed (001) Facets/Layered MoS2 Two-Dimensional Nanojunctions for Enhanced Solar Hydrogen Generation
| Autor: | Hongwei Lu, Yong-Jun Yuan, Zhigang Zou, Jiasong Zhong, Daqin Chen, Bin Hu, Zhi-Jun Ye, Yong-Hui Li, Zhen-Tao Yu |
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| Rok vydání: | 2015 |
| Předmět: |
Anatase
Materials science business.industry Composite number Quantum yield Nanotechnology Phot 02 engineering and technology General Chemistry engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Catalysis 0104 chemical sciences Semiconductor Chemical engineering engineering Photocatalysis Noble metal 0210 nano-technology business |
| Zdroj: | ACS Catalysis. 6:532-541 |
| ISSN: | 2155-5435 |
| DOI: | 10.1021/acscatal.5b02036 |
| Popis: | Cocatalysts have been extensively used to accelerate the rate of hydrogen evolution in semiconductor-based photocatalytic systems, but the influence of interface state between semiconductor and cocatalyst has been rarely investigated. Here, we demonstrate a feasible strategy of two-dimensional (2D) nanojuctions to enhance solar hydrogen generation of the MoS2/TiO2 system. Loading of 2D MoS2 nanosheets on the surface of 2D anatase TiO2 nanosheets with exposed (001) facets greatly increases the interfacial contact. At an optimal ratio of 0.50 wt % MoS2, the 2D-2D MoS2/TiO2 photocatalyst shows the highest H2 evolution rate of 2145 μmol h–1 g–1, which is almost 36.4 times higher than that of pure TiO2 nanosheets. The apparent quantum yield of hydrogen evolution system reaches 6.4% at 360 nm. More importantly, the 2D-2D MoS2/TiO2 composite exhibits photocatalytic activity much higher than those of noble metal (such as Pt, Rh, Ru, Pd, and Au) loaded TiO2 photocatalysts. The decisive factor in improving the phot... |
| Databáze: | OpenAIRE |
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