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Preparation of a transition metal dichalcogenide thin film and its photocatalytic application

A transition metal disulfide, photocatalyst technology, applied in physical/chemical process catalysts, non-metallic elements, inorganic chemistry, etc., can solve the problem of not being introduced reasonably and effectively, achieve excellent stability, single growth environment, improve The effect of photocatalytic efficiency

Active Publication Date: 2021-04-02
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although platinum selenide has been proved to have ultra-high electron transport ability and excellent stability, it has not been reasonably and effectively introduced into the field of photocatalytic hydrogen production. There is also a vacancy in the application of

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  • Preparation of a transition metal dichalcogenide thin film and its photocatalytic application
  • Preparation of a transition metal dichalcogenide thin film and its photocatalytic application
  • Preparation of a transition metal dichalcogenide thin film and its photocatalytic application

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Embodiment 1

[0031] (1) Preparation of platinum selenide thin film

[0032] 1) A vacuum thin film evaporation system is used to evaporate and deposit 20nm metal platinum on a substrate (selected from fluorine-doped tin oxide conductive glass (FTO)), and the evaporation current is 170A.

[0033] 2) Put the substrate deposited with 20nm metal platinum and 25mg of selenium powder in different porcelain boats, and place them in two different heating areas in a fully sealed quartz tube filled with argon, and prepare platinum selenide by chemical vapor deposition Film, wherein the temperatures of the two heating zones are respectively: the temperature of the growth source (ie the first heating zone) is 280°C, the temperature of the growth zone (ie the second heating zone) is 420°C, the heating time is 100min, and the residence time is For 90 minutes, the argon gas flow rate was 120 sccm, the pressure was 0.7 Torr, and finally the temperature was naturally cooled to room temperature to obtain a p...

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Abstract

The invention discloses a preparation and photocatalytic application of a transition metal disulfide thin film, and belongs to the field of transition metal disulfide photocatalysts. A multi-layer layered semi-metallic platinum selenide (PtSe2) thin film is successfully prepared by vacuum evaporation plating and a chemical vapor deposition low temperature selenide method. Platinum selenide has super-high electron transmission capacity, and is deposited on the surface of a semiconductor photocatalyst to form a platinum selenide-semiconductor thin film, and the thin film is applied to photocatalytic hydrogen production. The prepared platinum selenide-semiconductor thin film is easily separated from a bulk aqueous phase after heterogeneous reaction and easy to reuse, thereby having ultra-highstability. Platinum selenide can effectively inhibit the recombination of electrons and holes by rapidly conducting photoelectrons on a conduction band of the semiconductor photocatalyst, thereby greatly improving the photocatalytic performance of the semiconductor photocatalyst.

Description

technical field [0001] The invention belongs to the field of transition metal dichalcogenide photocatalysts, in particular to the preparation of platinum selenide (PtSe 2 ) film, and apply it to hydrogen production by photolysis of water. [0002] technical background [0003] Environmental pollution and energy crisis have become two important issues urgently needed to be solved in realizing sustainable development of human beings. For the sustainable development of mankind, it is urgent to develop clean and efficient energy. Solar energy is considered to be the best choice to replace fossil energy due to its non-polluting, cheap, huge energy and ubiquity. At the same time, hydrogen is a clean energy with high calorific value. After burning, it only produces water without polluting the environment, and hydrogen is also a widely used chemical raw material. However, hydrogen production through traditional electrolysis of water and biomass The production of hydrogen with meth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/057B01J35/00C01B3/04
CPCB01J27/0573B01J35/004C01B3/042C01B2203/0277Y02E60/36
Inventor 郑言贞张河川吕心顶邬娇娇陶霞
Owner BEIJING UNIV OF CHEM TECH
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