Indicator for detecting a photocatalyst
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Abstract
This invention relates to an indicator for detecting a photocatalyst wherein the indicator comprises at least one redox-sensitive material and either at least one electron donor or at least one electron acceptor. The invention also relates to a method for detecting a photocatalyst using an indicator. In particular, the photocatalyst may be a semiconductor such as titanium dioxide on a glass substrate.
35 Citations
76 Claims
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1-38. -38. (canceled)
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39. An indicator for detecting a photocatalyst material, the indicator comprising:
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at least one redox sensitive material which displays different physical properties in the oxidised and reduced forms; and
either at least one electron donor or at least one electron acceptor;
wherein the at least one redox sensitive material and either the at least one electron donor or the at least one electron acceptor are substantially in contact with one another; and
wherein in use irradiation of any photocatalyst material with light of greater than or equal to the energy necessary to electronically excite the photocatalyst material, the redox sensitive material becomes reduced and changes colour and/or luminescence light intensity. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 75)
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63. A method of detecting a photocatalyst material comprising the steps of providing an indicator comprising:
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at least one redox-sensitive material which displays different physical properties in the oxidised and reduced forms;
either at least one electron donor or at least one electron acceptor;
wherein the at least one redox sensitive material and either the at least one electron donor or the at least one electron acceptor are substantially in contact with one another; and
wherein in use irradiation of any photocatalyst material with light of greater than or equal to the energy necessary to electronically excite the photocatalyst material, the photosensitive material becomes reduced and changes colour and/or luminescent light intensity. - View Dependent Claims (64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74)
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76. A method of detecting a photocatalyst material comprising the steps of providing an indicator comprising:
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at least one redox-sensitive material which displays different physical properties in the oxidised and reduced forms;
either at least one electron donor or at least one electron acceptor;
wherein the at least one redox sensitive material and either the at least one electron donor or the at least one electron acceptor are substantially in contact with one another; and
wherein in use irradiation of any photocatalyst material with light of greater than or equal to the energy necessary to electronically excite the photocatalyst material, the photosensitive material becomes reduced and changes colour and/or luminescent light intensity and wherein when the photocatalyst material is only coated to one side of glass the indicator may not only identify the presence of the phtocatalyst material but also which side of the glass is coated.
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Specification