Photoactive coating, coated article, and method of making same
First Claim
Patent Images
1. A method of forming a photoactive coating, comprising the step of:
- depositing a precursor composition by chemical vapor deposition over at least a portion of a float glass ribbon in a molten metal bath, the precursor composition comprising;
a photoactive coating precursor material; and
at least one other precursor material comprising a dopant that increases photoactivity of the photoactive coating over that of the photoactive coating without the dopant.
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Abstract
A method of forming a photocatalytic coating includes depositing a precursor composition over at least a portion of a substrate surface by a coating device. The precursor composition includes a titania precursor material and at least one other precursor material having a metal selected from boron, strontium, zirconium, lead, barium, calcium, hafnium, lanthanum, and mixtures thereof. Sufficient other precursor material is added to the composition such that a molar ratio of the selected metal to titanium in the applied photocatalytic coating is in the range of about 0.001 to about 0.05.
189 Citations
59 Claims
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1. A method of forming a photoactive coating, comprising the step of:
depositing a precursor composition by chemical vapor deposition over at least a portion of a float glass ribbon in a molten metal bath, the precursor composition comprising;
a photoactive coating precursor material; and
at least one other precursor material comprising a dopant that increases photoactivity of the photoactive coating over that of the photoactive coating without the dopant. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of forming a photoactive coating, comprising the step of:
depositing a precursor composition over at least a portion of a substrate surface, the precursor composition comprising;
a titania precursor material; and
at least one metal alkoxide having a boiling point less than 200°
C.- View Dependent Claims (14, 15)
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16. A method of forming a photoactive coating, comprising the steps of:
depositing a precursor composition over at least a portion of a substrate surface, the precursor composition comprising;
a titania precursor material; and
at least one other precursor material having a metal selected from boron, strontium, zirconium, lead, barium, calcium, hafnium, lanthanum, and mixtures thereof; and
adding sufficient other precursor material to the composition such that a molar ratio of the selected metal to titanium in the applied photoactive coating is in the range of about 0.001 to about 0.05. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A method of forming a photocatalytic coating, comprising the steps of:
depositing a precursor composition over at least a portion of a substrate surface, the precursor composition comprising titanium isopropoxide and at least one other organometallic precursor material selected from triethyl borate, strontium isopropoxide, tetra-n-butyl lead, zirconium-2-methyl-2-butoxide, and lanthanum isopropoxide. - View Dependent Claims (32)
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33. A method of depositing a photocatalytic coating over a substrate, comprising the steps of:
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positioning a chemical vapor deposition coating device over a float glass ribbon in a float chamber;
directing a precursor composition from the coating device onto the ribbon, the precursor composition comprising a titania precursor material and at least one other precursor material having a metal selected from boron, strontium, lead, barium, calcium, hafnium, lanthanum, and mixtures thereof;
adding sufficient other precursor material to the composition such that a molar ratio of the selected metal to titanium in the applied photocatalytic coating is in the range of about 0.001 to about 0.05; and
heating the substrate to a temperature sufficient to decompose the precursor materials to form the photocatalytic coating.
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34. A method of increasing the photocatalytic activity of a titania coating, comprising the steps of:
adding to the titania coating at least one metal selected from boron, strontium, zirconium, lead, barium, calcium, hafnium, and lanthanum, such that a molar ratio of the selected metal to titanium in the photocatalytic coating is in the range of about 0.001 to about 0.05.
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35. A method of forming a photocatalytic coating, comprising the steps of:
depositing a precursor composition over at least a portion of a substrate, the precursor composition comprising titanium tetrachloride, a source of organic oxygen, and a boron containing precursor material. - View Dependent Claims (36, 37, 38, 39, 40)
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41. An article, comprising,
a substrate having at least one surface; - and
a photocatalytic coating deposited over at least a portion of the substrate surface, wherein the photocatalytic coating comprises titania and at least one additional material comprising at least one metal selected from boron, strontium, zirconium, lead, barium, calcium, hafnium, and lanthanum, and wherein the additional material is present in the coating in an amount such that a molar ratio of the selected metal to titanium in the photocatalytic coating is in the range of about 0.001 to about 0.05. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59)
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Specification