Near-Field Photocatalyst Including Zinc Oxide Nanowire
AssigneesSeoul National University R&Db Foundation, Postech Foundation
InventorsGyu-chul Yi, Motoichi Ohtsu, Takashi Yatsui
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Abstract
Disclosed is a near-field photocatalyst using a ZnO (ZnO) nanowire. The photocatalyst is advantageous in that low-priced zinc is used instead of titanium, conventionally used as a photocatalyst to reduce expenses, and that it is possible to obtain overvoltage which is sufficient to generate hydrogen using an optical near field formed around an end of a ZnO nanowire without the application of additional external voltage, thus the use of a costly electrode, such as platinum, is avoided and a process is simplified.
Claims20
A near-field photocatalyst using an optical near field formed around an end of a nanowire, comprising:
- a substrate;
- and
- a base formed on the substrate and including nanomaterial which includes one or more selected from ZnO, TiO2, GaP, ZrO2, Si CdS, KTaO2, KTaNBO, CdSe, SrTiO3, Nb2O3, Fe2O3, WO2, SaO2 or mixture thereof as a main component and which has a shape of a nanowire including a nanoneedle, a nanorod, or a nanotube.
A method of generating hydrogen using a photocatalyst, the photocatalyst comprising:
- a substrate;
- and
- a base including nanomaterial which has a shape of a nanowire including a nanoneedle, a nanorod, or a nanotube on the substrate and which has ZnO as a main component.
A device for generating hydrogen, comprising:
- a photocatalyst comprising:
- a substrate;
- and
- a base including nanomaterial which has a shape of a nanowire including a nanoneedle, a nanorod, or a nanotube on the substrate and which has ZnO as a main component.
A method of purifying wastewater or air using a photocatalyst, the photocatalyst comprising:
- a substrate;
- and
- a base including nanomaterial which has a shape of a nanowire including a nanoneedle, a nanorod, or a nanotube on the substrate and which has ZnO as a main component.
A device for purifying wastewater or air, comprising:
- a photocatalyst comprising:
- a substrate;
- and
- a base including nanomaterial which has a shape of a nanowire including a nanoneedle, a nanorod, or a nanotube on the substrate and which has ZnO as a main component.
Dependencies are inferred from the claim text.