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Visible radiation type photocatalyst and production method thereof

  • US 6,908,881 B1
  • Filed: 08/13/1999
  • Issued: 06/21/2005
  • Est. Priority Date: 08/21/1998
  • Status: Expired due to Fees
First Claim
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1. A catalyst having activity under an irradiation of visible light in a wavelength region from about 400 to 600 nm, comprising titanium dioxide having stable oxygen defects and exhibiting NOx oxidation activity under the irradiation of a visible light at least in the wavelength region of from about 400 to 600 nm;

  • and said titanium dioxide further having a peak area ratio (O1s/Ti2p) of a peak area obtained by X-ray photoelectron spectroscopy assigned to the 1s electrons of oxygen (O1s) participating in the bonds with titanium to a peak area obtained by X-ray photoelectron spectroscopy assigned to the 2p electrons of titanium (Ti2p) of 1.99 or lower.

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