Journal
JOURNAL OF POWER SOURCES
Volume 298, Issue -, Pages 30-37Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2015.08.040
Keywords
Surface charge transfer complex; Dye co-sensitization; Photocatalytic hydrogen production; Visible/near-infrared-light utilization; Stability
Funding
- Natural Science Foundation of China [21271146, 21271144, 21171134, 20973128, 20871096]
- Funds for Creative Research Groups of Hubei Province [2014CFA007]
- Fundamental Research Funds for the Central Universities of China [2042014kf0228]
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This work introduces a new strategy for visible/near-infrared (NIR) light responsive H-2 production over TiO2 nanoparticles co-sensitized with zinc phthalocyanine derivative (Zn-tri-PcNc) and surface ligand-to-metal charge transfer (LMCT) complex, which is in situ formed on the TiO2 nanoparticles' surfaces by using ascorbic acid (AA). The in situ formed surface LMCT complex (AA-TiO2) exhibits obvious visible-light-responsive photoactivity (126.2 pmol/h) for H-2 production with a high apparent quantum yield (AQY) of 16.1% at 420 nm monochromatic light irradiation. Moreover, the co-sensitized TiO2 nanoparticles (Zn-tri-PcNc-TiO2-AA) shows a much higher photoactivity (162.2 mu mol/h) for H-2 production than the surface LMCT complex, and broader spectral responsive region (400-800 nm) with a relatively high AQY value (0.97%) at 700 nm monochromatic light irradiation. The present result reveals a possible substitute for the conventional Ru(II)-bipyridyl complexes or organic dyes as sensitizer of semiconductors in the field of solar fuel conversion. (C) 2015 Elsevier B.V. All rights reserved.
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