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Photocatalytic water splitting

A technology of photocatalysis and photocatalysis, applied in the direction of physical/chemical process catalyst, inorganic chemistry, electrolysis process, etc., can solve problems such as difficult separation and not very effective

Inactive Publication Date: 2013-05-08
特温特大学
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the dispersion of these composite nanoassemblies, it will be difficult to separate the generated hydrogen and oxygen, and there is a possibility of recombination to generate water
Furthermore, this system will not be very efficient in visible light-induced water splitting

Method used

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Examples

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Embodiment Construction

[0026]In one embodiment, the thin conductive isolation layer is mechanically supported by one or more perforated supports. This is particularly advantageous when the electrically conductive isolating layer is so thin that it has low mechanical stability itself. The perforated carrier may be provided on one or both surfaces of the conductive isolation layer. Since the support is perforated, it enables the photocatalyst to directly contact the conductive isolation layer, which is of course desirable in terms of efficient electron transfer.

[0027] The perforated support has a thickness in the range of 50-1000 μm, preferably in the range of 100-750 μm, which can be determined by scanning and / or transmission electron microscopy. A suitable and practical carrier is, for example, a silicon carrier, such as a silicon wafer. If necessary, the carrier can be perforated, such as by a standard etching process (process, process). In many cases it is advantageous to produce an electric...

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Abstract

The invention is directed to a method for photocatalytic water splitting, and to an apparatus for carrying out said method. The method of the invention comprises - oxidising water with an oxygen evolution photocatalyst by irradiation with light, causing an electron to be generated in the conduction band of the oxygen evolution photocatalyst and a hole to be generated in the valence band of the oxygen evolution photocatalyst; - reducing water with a hydrogen evolution photocatalyst by irradiation with light, causing an electron to be generated in the conduction band of the hydrogen evolution photocatalyst and a hole to be generated in the valence band of the hydrogen evolution photocatalyst; wherein said oxygen evolution photocatalyst is in contact with a first side of an electrically conductive separator layer and said hydrogen evolution photocatalyst is in contact with a second side of said electrically conductive separator layer, and wherein the electron from the conduction band of the photo-excited oxygen evolution photocatalyst recombines with the hole from the valence band of the photo-excited hydrogen evolution photocatalyst via charge transfer through the electrically conductive separator layer.

Description

technical field [0001] The invention relates to a method for the photocatalytic splitting of water, and a device for carrying out said method. Background technique [0002] Global energy challenges are universal and a shift to alternative sustainable energy sources is inevitable, especially sunlight. The obvious prerequisite is that the energy source should be available twenty-four hours a day. Since solar energy is only available during the day, it would be very beneficial to store the energy in a suitable manner. Storage in the form of hydrogen would be a very attractive way to do this. The ideal way to produce hydrogen is to use water as a hydrogen source along with solar energy for conversion. Therefore, photocatalytic water splitting (which is the light-induced conversion of water into hydrogen and oxygen) has attracted much attention as one of the most promising hydrogen production processes. [0003] Efficient water splitting using photocatalysts has been a great ...

Claims

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Application Information

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IPC IPC(8): C01B3/04C01B13/02
CPCC01B13/0207C01B3/042Y02E60/364Y02E60/36B01J23/44C01B3/04C01B13/02C25B1/55
Inventor 吉多·米尔威尔弗雷德·格拉尔德·范德尔维尔马希尔·彼得·德容
Owner 特温特大学
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