期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 557, 期 -, 页码 700-708出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2019.09.075
关键词
Photocatalytic H-2 production; g-C3N4; Au nanorods; Near-infrared; Visible
资金
- National Natural Science Foundation of China [51872173, 51772167]
- Taishan Scholarship of Young Scholars [tsqn201812068]
- Natural Science Foundation of Shandong Province [ZR2017JL020]
- Taishan Scholarship of Climbing Plan [tspd20161006]
- Key Research and Development Program of Shandong Province [2018GGX102028]
Recently, broad spectrum (visible and near-infrared (NIR)) light utilization has aroused widespread attention in the research of photocatalysis. While g-C3N4, highly stable, cheap and easily synthesized, shows H-2 evolution activity under visible light irradiation, it doesn't perform under NIR light irradiation. Here we report an Au nanorods (NRs)/g-C3N4 heterostructure with Au nanorods on g-C3N4's surface. The most exciting feature of designed Au NRs/g-C3N4 heterostructures is that Au nanorods themselves are excited by visible and NIR light, which produce hot electrons and inject into g-C3N4. The photocatalytic H-2 evolution rate of Au NRs/g-C3N4 heterostructures (350.6 mu mol g(-1) h(-1)) is nearly 4 times higher than that of g-C3N4 with Pt as cocatalyst (68.9 mu mol g(-1) h(-1)) under visible light illumination. The improved photocatalytic activity is ascribed to the increasing visible light-absorbing capacity of transverse surface plasmon resonance (TSPR) of Au nanorods and improved charge separation of Au NRs/g-C3N4 heterostructure. Even more important, Au NRs/g-C3N4 heterostructures achieve NIR photocatalytic H-2 evolution performance (63.1 mu mol g(-1) h(-1)), owing to the longitudinal SPR (TSPR) effect of Au nanorods induced NIR light harvesting ability. (C) 2019 Elsevier Inc. All rights reserved.
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