期刊
NANOTECHNOLOGY
卷 31, 期 16, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1361-6528/ab6747
关键词
LSPR; multiband emissions; plasmonic semiconductor
资金
- National Natural Science Foundation of China [11874101, 11874055]
- Program for New Century Excellent Talents in University [NCET-13-0702]
- Science and Technology Project of Liaoning Province [2012222009]
- Program for Liaoning Innovation Team in University [LT2016011]
- Natural Science Foundation of Liaoning Province [20170540200, 2018055007]
- Science and Technique Foundation of Dalian [2017RD12]
- Fundamental Research Funds for the Central Universities [0220-110010]
The core-shell CeO2:Er,Yb@W18O49 heterojunction is successfully synthesized via the facile solvothermal method. The octahedral CeO2:Er,Yb nanocrystal's core exhibits green (H-2(11/2), S-4(3/2) -> I-4(15/2)), red (F-4(9/2) -> I-4(15/2)) and NIR (I-4(11/2) -> I-4(15/2) and I-4(13/2) -> I-4(15/2)) emission under 980 nm laser diode excitation, and the multiband emissions are absorbed by the W18O49 nanowire's shell, re-exciting its higher energy localized surface plasmon resonances (LSPR). With the excitation of 980 nm, the photocatalytic property of CeO2:Er,Yb@W18O49 for hydrogen (H-2) evolution from ammonia borane (BH3NH3), a three-fold increase compared to W18O49, is researched. The application of natural sunlight for the production of H-2 is studied, and an obvious H-2 production enhancement compared to the use of W18O49 (two-fold) is also observed. This remarkable enhancement in the catalytic activity of CeO2:Er,Yb@W18O49 heterostructures is ascribed to the re-excitation of LSPR by multiband emissions of CeO2:Er,Yb.
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