期刊
RSC ADVANCES
卷 9, 期 44, 页码 25638-25646出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9ra03532j
关键词
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资金
- National Natural Science Foundation of China [NSFC 51402198, 21671139, 21201123]
- National Key R&D Program of China [2018YFF01011400]
- Natural Science Foundation of Liaoning Province [20170540715]
- Fundamental Research of Educational Bureau of Liaoning Province [LQ2017005]
- Liaoning Excellent Talents in University [LR2016016]
- Science and Technology Innovation Program for Middle-aged and Young Scientist of Shenyang [RC180066, RC180086]
- Open Funds of the State Key Laboratory of Rare Earth Resource Utilization [RERU2018015, RERU2019009]
The solar-to-fuel conversion using a photocatalyst is an ideal method to solve the energy crisis and global warming. In this contribution, photocatalytic H-2 production and organic pollutant removal using g-C3N4/CuS composite was demonstrated. Well dispersed CuS nanoparticles (NPs) with a size of about 10 nm were successfully grown on the surface of g-C3N4 nanosheet via a facile hydrothermal method. The as-prepared g-C3N4/CuS nanocomposite at an optimized loading exhibited a much higher visible light photoactivity, giving up to 2.7 times and 1.5 times enhancements in comparison to pure g-C3N4 for photocatalytic H-2 production and methylene orange (MO) degradation, respectively. These enhanced photocatalytic activities are attributed to the interfacial transfer of photogenerated electrons and holes between g-C3N4 and CuS, which leads to effective charge separation on both parts. That is, under the visible light irradiation, electrons in the valence band (VB) of g-C3N4 can directly transfer to the CuS NPs, which can act as an electron sink and co-catalyst to promote the separation and transfer of photo-generated electrons, thus significantly improving the photocatalytic efficiency.
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