Catalyst for production of hydrogen from water by photocatalytic decomposition and preparation method of catalyst

A technology for producing hydrogen and catalysts from water, which is applied in physical/chemical process catalysts, chemical instruments and methods, hydrogen production, etc., can solve the problems of high production cost and low catalytic efficiency of catalysts, and achieves low cost and photocatalytic hydrogen production capacity. Strong and suitable for mass production

Active Publication Date: 2018-12-21
BEIJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The first object of the present invention is to provide a catalyst for photocatalytic decomposition of water to produce hydrogen, so as to solve the technical problems of low catalyst efficiency and high production cost in the prior art

Method used

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  • Catalyst for production of hydrogen from water by photocatalytic decomposition and preparation method of catalyst
  • Catalyst for production of hydrogen from water by photocatalytic decomposition and preparation method of catalyst
  • Catalyst for production of hydrogen from water by photocatalytic decomposition and preparation method of catalyst

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preparation example Construction

[0046] The present invention also provides a preparation method of the catalyst for photocatalytically decomposing water to produce hydrogen, comprising the following steps:

[0047] The molybdenum disulfide array is grown in-situ in the titanium dioxide nano-pit array, and the reduction stripping is carried out to obtain the obtained product.

[0048] In a preferred embodiment of the present invention, the in-situ growth method includes: depositing a metal molybdenum layer on the titanium dioxide nano-pit array, and performing a sulfidation reaction under the protection of an inert gas.

[0049] In a preferred embodiment of the present invention, the thickness of the metal molybdenum layer is 40-60 nm.

[0050] In a preferred embodiment of the present invention, the method of the vulcanization reaction includes: placing the titanium dioxide nano-pit array deposited with the metal molybdenum layer in a sulfur-containing atmosphere under heating conditions to carry out the vulc...

Embodiment 1

[0056] The preparation method of the catalyst for photocatalytic decomposition of water to produce hydrogen described in this embodiment, the steps are as follows:

[0057] (a) Take a titanium foil with a thickness of 0.05 mm, ultrasonically clean it in acetone, ethanol and deionized water for 30 minutes, and dry it to obtain a clean titanium foil;

[0058] (b) Immerse the clean titanium foil obtained in step (a) into 3mol / L HF (solute) / H 3 PO 4 (Solvent) In the electrolyte, titanium foil and platinum foil are respectively used as the working electrode and the counter electrode, oxidized at a constant voltage of 10V for 4h, cleaned with ethanol, and dried to obtain a honeycomb-shaped array of titanium dioxide nano-pit arrays arranged in an orderly manner; The scanning electron micrograph of described titania nanopit array is as figure 1 shown;

[0059] (c) Depositing a metal molybdenum layer 40nm on the titanium dioxide nano-pit array obtained in step (b) by electron beam e...

Embodiment 2

[0062] The preparation method of the catalyst for photocatalytic decomposition of water to produce hydrogen described in this embodiment, the steps are as follows:

[0063] (a) Take a titanium foil with a thickness of 0.05 mm, ultrasonically clean it in acetone, ethanol and deionized water for 30 minutes, and dry it to obtain a clean titanium foil;

[0064] (b) Immerse the clean titanium foil obtained in step (a) into 3mol / L HF (solute) / H 3 PO 4 (Solvent) In the electrolyte, titanium foil and platinum foil are respectively used as the working electrode and the counter electrode, oxidized at a constant voltage of 10V for 4h, cleaned with ethanol, and dried to obtain a honeycomb-shaped array of titanium dioxide nano-pit arrays arranged in an orderly manner;

[0065] (c) Depositing a metal molybdenum layer of 40 nm on the titanium dioxide nano-pit array obtained in step (b) by electron beam evaporation to obtain a titanium dioxide nano-pit array deposited with a molybdenum layer...

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Abstract

The invention relates to the technical field of hydrogen produced from water by photocatalytic decomposition, in particular to a catalyst for production of hydrogen from water by photocatalytic decomposition and a preparation method of the catalyst. The catalyst for production of hydrogen from water by photocatalytic decomposition comprises a titanium dioxide nano-hollow array and a molybdenum disulfide array grown in the nano-hollow array, and reduction stripping is performed on the molybdenum disulfide array. The preparation method comprises following steps: growing the molybdenum disulfidearray in situ in the titanium dioxide nano-hollow array and performing the reduction stripping to obtain the catalyst for production of hydrogen from water by photocatalytic decomposition. The catalyst for production of hydrogen from water by photocatalytic decomposition provided by the invention has strong light absorption capability, wide light absorption range, high photon-generated carrier activity, and strong photocatalytic hydrogen production ability; the catalyst realizes non-metal plasma resonance light absorption on the basis of intrinsic absorption of materials, greatly improves utilization rate of solar energy and exhibits excellent performance in hydrogen production from seawater.

Description

technical field [0001] The invention relates to the technical field of photocatalytic decomposition of water to produce hydrogen, in particular to a catalyst for photocatalytic decomposition of water to produce hydrogen and a preparation method thereof. Background technique [0002] Fossil energy is currently the most dependent energy source, but the non-renewability and overuse of chemical fuels not only exacerbate the risks of future energy sources, but also bring about problems such as air pollution and global warming. Therefore, it is imminent to develop clean and renewable new energy sources. Similar to natural gas, hydrogen energy has the advantages of no pollution, abundant raw materials, and high calorific value. It is considered to be one of the better strategies to solve the current energy crisis facing mankind. There are many ways to prepare hydrogen, among which the use of solar energy to split water to produce hydrogen and store it effectively is one of the mos...

Claims

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Application Information

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IPC IPC(8): B01J27/051C01B3/04
CPCB01J27/051C01B3/042C01B2203/0277C01B2203/1041Y02E60/36Y02P20/133
Inventor 郭丽敏张家萌王青敏毕科
Owner BEIJING UNIV OF POSTS & TELECOMM
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