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Article having photocatalytic activity

  • US 6,833,089 B1
  • Filed: 08/02/2000
  • Issued: 12/21/2004
  • Est. Priority Date: 08/05/1999
  • Status: Expired due to Fees
First Claim
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1. An article having photocatalytic activity which comprises a substrate, a first n-type semiconductor film as a primer layer formed over a surface of the substrate, and a photocatalyst film made of an n-type semiconductor and formed on the primer layer, said first n-type semiconductor film as the primer layer (i) having an energy band gap larger than that of said photocatalyst film and (ii) being an oxide semiconductor film consisting of at least one metal oxide selected from the group consisting of niobium oxide and zirconium oxide.

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