期刊
CHEMISTRYSELECT
卷 2, 期 9, 页码 2681-2686出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/slct.201700419
关键词
hydrogen; noble metal-free; photocatalysis; TiO2/CdS/Cu2-xS; water splitting
资金
- National Natural Science Foundation of China [21471039, 21571043, 21671047]
- Fundamental Research Funds for the Central Universities (PIRS) [HIT A201502, HIT. BRETIII. 201223]
- China Postdoctoral Science Foundation [2014 M560253]
- Postdoctoral Scientific Research Fund of Heilongjiang Province [LBH-Q14062, LBH-Z14076]
- Natural Science Foundation of Heilongjiang Province [B2015001]
Solar-driven photocatalytic water splitting is a promising technology to produce H-2 energy. Herein, we demonstrate the fabrication of a ternary catalyst, H-TiO2/CdS/Cu2-xS, by chemical bath deposition and ion exchange for efficient photocatalytic water splitting, based on hydrogenated TiO2 (H-TiO2) with roughened surface and hollow structures. The as-prepared H-TiO2/CdS/Cu2-xS ternary structure can make use of the full solar spectrum and have a better response to the near infrared region. The tuned bandgap alignments in this ternary heterostructure enable efficient separation of photogenerated electrons and holes, leading to a hydrogen production rate as high as 261.54 mu molg(-1)h(-1) without noble metal as co-catalyst. Meanwhile, a photocatalytic hydrogen production rate of 210.63 mu molg(-1)h(-1) can be maintained after five cycles. We believe this fabricated noble metal-free ternary heterostructure catalyst has a great potential in solar energy conversion with improved solar energy absorption and efficient electron-hole separation.
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