期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 200, 期 -, 页码 578-584出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2016.07.033
关键词
Photocatalysis; Co-catalyst; Hydrogen; Ni@C; Graphene layers
资金
- National Natural Science Foundation of China [21573068]
- SRF for ROCS, SEM
- SRFDP
- Program of Shanghai Subject Chief Scientist [15XD1501300]
- Fundamental Research Funds for the Central Universities [WD1313009, WD1514303]
- China Postdoctoral Science Foundation Funded Project [2016M591615]
- 111 Project [B14018]
Metallic nickel nanoparticles well dispersed in graphitized carbon matrix (Ni@C) by pyrolysis of metal organic frameworks and leaching treatment of hydrochloric acid could greatly enhance the photocatalytic activity of g-C3N4 under visible light irradiation. For 2.0 wt% Ni@Cig-C3N4, the average hydrogen evolution rate is 2.15 mmol h(-1) g(-1), which is around 88 times higher than that of pure g-C3N4, and even better than that of platinum-loaded g-C3N4. The remarkably improved photocatalytic activities through loading Ni@C can be attributed to the cooperative work of Ni nanoparticles and graphene layers, which facilitate the separation of photo-generated carriers and suppress the recombination of the electron-hole pairs. In addition, the hollow onion-like structure can restrain the formation of Ni-hydrogen bonds which modulates desorption of hydrogen. Our studies may open up a promising strategy to design economical noble-metal-free co-catalysts for efficient solar energy conversion. (C) 2016 Elsevier B.V. All rights reserved.
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