期刊
ENERGY & ENVIRONMENTAL SCIENCE
卷 10, 期 3, 页码 772-779出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ee03442j
关键词
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资金
- National Natural Science Foundation of China [21276104, 21376104]
- Natural Science Foundation of Guangdong Province, China [2014A030306010, 2014A030310302]
- NSFC/Hong Kong RGC [N_HKUST610/14]
- RGC of Hong Kong [16300915]
Here, we demonstrate that carbon quantum dots (CQDs), as a low cost, chemically stable, and environmentally friendly photosensitizer, can dramatically broaden the light absorption range to the entire visible range. Consequently, the NiOOH/FeOOH/CQD/BiVO4 (NFCB) photoanode has achieved a remarkable photocurrent density of 5.99 mA cm(-2) at 1.23 V vs. RHE under AM 1.5G in KH2PO4 aqueous solution without a hole scavenger (pH = 7) and a record high applied bias photon-to-current efficiency of 2.29% at 0.6 V vs. RHE for BiVO4-based photoanodes. This novel NFCB photoanode could operate stably for 10 h with a Faraday efficiency of similar to 95%, demonstrating the great potential of using CQDs for solar water splitting.
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