Member having photocatalytic function and method for manufacture thereof
First Claim
1. A member having a photocatalytic function comprising:
- a substrate;
an undercoat layer provided on said substrate; and
a photocatalyst layer formed on said undercoat layer, wherein said undercoat layer is crystalline, said photocatalyst layer is constituted of a crystalline phase, and no dead layer which is observed as a halo pattern in an electron diffraction image is substantially present between said undercoat layer and said photocatalyst layer.
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Accused Products
Abstract
A photocatalyst layer (TiO2) is formed on the surface of a substrate (glass plate) through the intermediary of a monoclinic undercoat layer (ZrO2), and no dead layer is substantially present between the photocatalyst layer and the undercoat layer. Also, by providing a peel preventing layer between the substrate and the undercoat layer, it is possible to eliminate film peeling between the photocatalyst layer and the substrate, defects and discoloration. In the above-described TiO2 layer, metal such as tin (Sn), zinc (Zn), molybdenum (Mo) or iron (Fe) is doped. The phrase “no dead layer is substantially present” means that the thickness of the dead layer is 20 nm or less. The thickness of the photocatalyst layer is preferably from 1 nm to 1,000 nm, more preferably from 1 nm to 500 nm.
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Citations
34 Claims
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1. A member having a photocatalytic function comprising:
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a substrate;
an undercoat layer provided on said substrate; and
a photocatalyst layer formed on said undercoat layer, wherein said undercoat layer is crystalline, said photocatalyst layer is constituted of a crystalline phase, and no dead layer which is observed as a halo pattern in an electron diffraction image is substantially present between said undercoat layer and said photocatalyst layer.
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2. A member having a photocatalytic function comprising:
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a substrate;
a peel preventing layer, whose main component is an oxide, an oxynitride or a nitride of at least one of silicon and tin, provided on the surface of said substrate;
an undercoat layer provided on said peel preventing layer; and
a photocatalyst layer formed on the surface of said undercoat layer, wherein said undercoat layer is crystalline, said photocatalyst layer is constituted of a crystalline phase, and no dead layer which is observed as a halo pattern in an electron diffraction image is substantially present between said undercoat layer and said photocatalyst layer. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A method for manufacturing a photocatalytic member comprising the steps of:
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forming a peel preventing layer whose main component is an oxide, an oxynitride or a nitride containing at least one of silicon and tin on the surface of a substrate;
forming a monoclinic zirconium oxide layer at low temperature on said peel preventing layer; and
forming a photocatalyst layer constituted of a crystalline phase on said monoclinic zirconium oxide layer. - View Dependent Claims (33, 34)
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Specification