Promoting Charge Separation in g-C3N4/Graphene/MoS2 Photocatalysts by Two-Dimensional Nanojunction for Enhanced Photocatalytic H2 Production
| Autor: | Ling-Xia Yang, Gaoliang Fang, Daqin Chen, Mingye Ding, Yong-Jun Yuan, Yan Yang, Zijian Li, Wangfeng Bai, Shiting Wu, Zhen-Tao Yu, Zhigang Zou, Dapeng Cao |
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| Rok vydání: | 2018 |
| Předmět: |
Photoluminescence
Materials science Graphene Graphitic carbon nitride Energy Engineering and Power Technology Quantum yield 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention Artificial photosynthesis chemistry.chemical_compound Chemical engineering chemistry law Materials Chemistry Electrochemistry Photocatalysis Chemical Engineering (miscellaneous) Charge carrier Electrical and Electronic Engineering 0210 nano-technology Ternary operation |
| Zdroj: | ACS Applied Energy Materials. 1:1400-1407 |
| ISSN: | 2574-0962 |
| DOI: | 10.1021/acsaem.8b00030 |
| Popis: | Graphitic carbon nitride (g-C3N4) is a promising photocatalyst for solar H2 generation, but the practical application of g-C3N4 is still limited by the low separation efficiency of photogenerated charge carriers. Herein, we report the construction of ternary g-C3N4/graphene/MoS2 two-dimensional nanojunction photocatalysts for enhanced visible light photocatalytic H2 production from water. As demonstrated by photoluminescence and transient photocurrent studies, the intimate two-dimensional nanojuction can efficiently accelerate the charge transfer, resulting in the high photocatalytic activity. The g-C3N4/graphene/MoS2 composite with 0.5% graphene and 1.2% MoS2 achieves a high H2 evolution rate of 317 μmol h–1 g–1, and the apparent quantum yield reaches 3.4% at 420 nm. More importantly, the ternary g-C3N4/graphene/MoS2 two-dimensional nanojunction photocatalyst exhibits much higher photocatalytic activity than the optimized Pt-loaded g-C3N4 photocatalyst. |
| Databáze: | OpenAIRE |
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