期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 37, 期 3, 页码 2224-2230出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2011.11.004
关键词
Graphene; TiO2-graphene; Solvothermal reduction; Hydrogen production
资金
- National Nature Science Foundation of China [50802051]
- National Key Basic Research and Development Program of China [2009CB220004]
- Chinese Postdoctoral Science Foundation [20060400055]
TiO2 (P25)-graphene (P25-GR) hybrids were prepared via solvothermal reaction of graphene oxide and P25 using ethanol as solvent. The as-prepared P25-GR nanocomposites were characterized by X-ray diffraction, Raman spectroscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, photoluminescence emission spectroscopy and ultraviolet-visible (UV-vis) diffuse reflectance spectroscopy. The results indicated that P25-GR nanocomposites possessed enhanced light absorption ability and charge separation efficiency. As photocatalysts, P25-GR hybrids were much better than the bare P25, when they were used in the hydrogen evolution from aqueous methanol solution under Xe-lamp illumination. A significant enhancement in the rate of hydrogen production was achieved through using P25-GR as photocatalysts, comparing to bare P25. The optimum mass ratio of GR to P25 in the hybrids was 0.5 wt%. The higher mass ratio of GR in P25-GR would decrease the photocatalytic activity of P25. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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