Journal
NANOSCALE
Volume 11, Issue 33, Pages 15633-15640Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9nr05086h
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Funding
- National Natural Science Foundation of China [21471039, 21571043, 21671047, 21871065]
- Natural Science Foundation of Heilongjiang Province [B2015001]
- DOE Office of Science [DE-SC0012704]
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In order to further enhance the performance of photocatalysts, cocatalysts are used to accelerate the photocatalytic reactions. Herein, ultrafine cobalt oxide (CoO) nanoparticles are synthesized through a novel bottom-up strategy and explored as an efficient non-noble cocatalyst to dramatically promote the photocatalytic hydrogen evolution rate of CdS nanorods. CdS/CoO heterostructures, consisting of highly dispersed 3-5 nm CoO nanoparticles anchored on the CdS nanorods, can provide a high photocatalytic hydrogen evolution rate of 6.45 mmol g(-1) h(-1) (similar to 36 times higher than that of bare CdS nanorods) in the visible-light region (>420 nm). Combined X-ray photoelectron spectroscopy and X-ray absorption near edge spectroscopy analyses suggest Co-S bond formation between CoO and CdS, which guarantees efficient migration and separation of photogenerated charge carriers. This work provides a new avenue for adopting CoO as an effective cocatalyst for enhanced photocatalytic hydrogen production in the visible-light region.
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