Method for detecting hydrogen by palladium nanoparticle discrete film

A palladium nanoparticle and thin film technology, applied in the field of hydrogen detection, can solve the problems affecting the accuracy of hydrogen, poisoning, etc., and achieve the effects of avoiding phase transition, suppressing zero offset, and ensuring accuracy

Inactive Publication Date: 2018-11-23
JIANGHAN UNIVERSITY
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Problems solved by technology

[0004] The palladium-yttrium alloy film in the existing optical fiber hydrogen sensor is easily poisoned by oxygen in the air, which causes the film to bubble and crack and cause zero point drift, which affects the accuracy of hydrogen detection. Therefore, we propose a discrete film of palladium nanoparticles to detect hydrogen Methods

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  • Method for detecting hydrogen by palladium nanoparticle discrete film

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Embodiment Construction

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0018] The invention provides a technical solution: a method for detecting hydrogen by a palladium nanoparticle discrete film, comprising the following steps:

[0019] (1) First prepare hexafluoroacetylacetonate palladium (II), formalin, quartz glass substrate, high-purity nitrogen and carbon support membrane;

[0020] (2) Palladium (II) hexafluoroacetylacetonate is introduced into the reaction chamber as a precursor in a vacuum environment, and palladium (II) hexafluoroacetylacetonate is used as a precursor to chemical...

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Abstract

The invention discloses a method for detecting hydrogen by a palladium nanoparticle discrete film. The method comprises the following steps that: palladium hexafluoroacetone (II), formalin, a quartz glass substrate, high-purity nitrogen and a carbon-supporting film are firstly prepared; under a vacuum environment, palladium hexafluoroacetone (II) is introduced into a reaction chamber as a precursor, and chemical absorption and chemical reaction are generated by the precursor of palladium hexafluoroacetone (II) and the surface of the quartz glass substrate; the formalin as a precursor generateschemical reaction with palladium hexafluoroacetone (II) as the precursor combined with the substrate. The method disclosed by the invention has the beneficial effects that the response rate of a sensing film to the hydrogen can be effectively increased, the phase change phenomenon caused by pure palladium in the high-concentration hydrogen can be effectively avoided, the accuracy of detection canbe ensured, and the problems that a palladium-yttrium alloy film in the existing optical-fiber hydrogen sensor is easily poisoned by oxygen in the air to cause foaming and cracking and the like of the film to further cause zero drift and influence the accuracy of hydrogen detection are solved.

Description

technical field [0001] The invention relates to the technical field of hydrogen detection, in particular to a method for detecting hydrogen by a palladium nanoparticle discrete film. Background technique [0002] Hydrogen is known as the three major new energy sources together with solar energy and nuclear energy due to its high combustion efficiency and non-polluting products. As a new energy, hydrogen has been widely used in aviation, power and other fields; at the same time, as a reducing gas and carrier gas, hydrogen is extremely important in chemical industry, electronics, medical treatment, metal smelting, especially in the field of military and national defense. Value. However, the hydrogen molecule is very small, and it is easy to leak during production, storage, transportation and use. Because hydrogen is not conducive to breathing, it is colorless and odorless, and cannot be detected by the human nose. The ignition point is only 585 °C, and the content in the air ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/17
CPCG01N21/1717G01N2021/1721
Inventor 孙超丁建军黄鹏程兰慧杨飘张明杨
Owner JIANGHAN UNIVERSITY
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