Bulletin of the Korean Chemical Society

  • 제34권7호
  • /
  • Pages.2056-2062
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  • 2013
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  • 0253-2964(pISSN)
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  • 1229-5949(eISSN)
대한화학회 (Korean Chemical Society)
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Preparation of Dihydroxy Naphthalene/TiO2 Complex via Surface Modification and Their Photocatalytic H2 Production Performances Under Visible Light

  • Hu, Shaozheng (Institute of Eco-environmental Sciences, Liaoning Shihua University) ;
  • Li, Fayun (Institute of Eco-environmental Sciences, Liaoning Shihua University) ;
  • Fan, Zhiping (Institute of Eco-environmental Sciences, Liaoning Shihua University)
  • 투고 : 2013.03.18
  • 심사 : 2013.04.12
  • 발행 : 2013.07.20
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초록

The dihydroxy naphthalene/$TiO_2$ complexes with different substitution patterns were prepared by surface modification. X-ray diffraction, UV-Vis spectroscopy, photoluminescence, and X-ray photoelectron spectroscopy were used to characterize the prepared composite materials. The results indicated that the surface modification did not influence the crystallization of $TiO_2$. The visible-light absorbances of prepared dihydroxy naphthalene/$TiO_2$ complexes could be assigned to the ligand-to-metal charge transfer. The obtained catalyst exhibited outstanding photocatalytic activity and stability under visible light. A linear relationship existed between the percentages of hydroxynaphthalenes coordinated on $TiO_2$ surface and $H_2$ production ability. The substitution pattern of dihydroxy naphthalene and $CH_3OH$ content could also influence the photocatalytic performance remarkably. The photocatalytic $H_2$ production ability was further improved after loading with ultra low concentration of Pt, 0.02 wt %. The possible mechanism was proposed.

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