Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 183, Issue -, Pages 176-184Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2015.10.040
Keywords
Oxynitride semiconductors; Photocatalysis; Solid-state; Z-scheme; Energy conversion
Funding
- Natural Science Foundation of China [21271055, 21471040]
- Fundamental Research Funds for the Central Universities [HIT.IBRSEM.A.201410]
- Open Project of State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology [QAK201304]
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Achieving ideal photocatalytic systems by mimicking Z-scheme mechanism in natural photosynthesis results in highly efficient artificial photosynthesis. A new oxynitride-based solid state Z-scheme photocatalytic system containing (GaxZn(1-x))(NxO(1-x)) and Nb3.49N4.56O0.44 was constructed. Nb-3.49 N4.56O0.44/(GaxZn(1-x))(NxO(1-x))(6.0) exhibits the highest rate for complete reduction of Cr(VI) within 30 min under simulated sunlight irradiation as well as extremely high apparent quantum efficiency of 68% at 350 nm 24.4% at 420 nm for photocatalytic water oxidation: A similar solid state Z-scheme photocatalytic system was also obtained when. compositing Nb3.49N4.56O0.44 with TaON. It's expected that Nb3.49N4.56O0.44 can also be composed with other oxynitride semiconductor to construct more oxynitride-based solid state Z-scheme photocatalytic systems. (C) 2015 Elsevier B.V. All rights reserved.
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