期刊
GREEN ENERGY & ENVIRONMENT
卷 6, 期 4, 页码 538-545出版社
KEAI PUBLISHING LTD
DOI: 10.1016/j.gee.2020.05.011
关键词
Nitrogen fixation; Z-Scheme heterojunction; g-C3N4; Photocatalysis
类别
资金
- National Natural Science Foundation of China [21776118, 21808090]
- Natural Science Foundation of Jiangsu Province [BK20190981]
- Jiangsu Fund for Distinguished Young Scientists [BK20190045]
- China Postdoctoral Science Foundation [2019M661765]
- High-tech Research Key laboratory of Zhenjiang [SS2018002]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- high-performance computing platform of Jiangsu University
2D g-C3N4 composites with modifying ultrathin sheet MnO2-x were prepared and used as nitrogen fixation photocatalyst, leading to an increased NH3 generation rate. The presence of ultrathin sheet MnO2-x shortened the gap of the carriers to the surface of photocatalyst, improving the speed of electron transfer, while the construction of Z-scheme heterojunction boosted the separation and migration of photogenerated carriers, enhancing the nitrogen reduction reaction (NRR) performance.
Reducing nitrogen to ammonia with solar energy has become a wide concern when it comes to photocatalysis research. It is considered to be one of the more promising alternate options for the conventional Haber-Bosch cycle. Herein, 2D g-C3N4 composites with modifying ultrathin sheet MnO2-x were prepared and used as nitrogen fixation photocatalyst. With the assistance of the nature of MnO2-x, the generation rate of NH3 reached 225 mu mol g(-1) h(-1), which is more than twice over the rate of pristine 2D g-C3N4 (107 mu mol g(-1) h(-1)). The presence of ultrathin sheet MnO2-x shortens the gap of the carriers to the surface of photocatalyst. Thus the speed of electron transfer gets increased. Besides, the construction of Z-scheme heterojunction boosts the separation and migration of photogenerated carriers. As a result, the nitrogen reduction reaction (NRR) performance gets enhanced. The work may provide an example of promoting the NRR performance of non-metallic compound. (C) 2021, Institute of Process Engineering, Chinese Academy of Sciences. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co., Ltd.
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