Label color band for detecting hydrogen and preparation method thereof

A label and ribbon technology, used in measuring devices, material analysis, instruments, etc. by observing the impact on chemical indicators, can solve the problems of inconvenience of carrying hydrogen sensors, distorted output signals, low safety factor, etc., to improve uniformity. Sensitivity and sensitivity, improved response speed, fast adsorption effect

Active Publication Date: 2018-09-28
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most of the commonly used hydrogen sensors are semiconductor-type hydrogen sensors. This kind of sensor is based on the change of electrical signals such as resistance or voltage caused by hydrogen-sensitive materials encountering hydrogen. Usually, an external current and electrical signal processor are required. In places where there is electromagnetic interference The output signal will be distorted, and it will be very dangerous if it causes electric sparks in a hydrogen atmosphere
Therefore, due to the inconvenient portability, low safety factor, and high cost of the current mainstream hydrogen sensors, it is of great significance to explore low-cost, easy-to-use visual hydrogen label ribbons

Method used

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  • Label color band for detecting hydrogen and preparation method thereof
  • Label color band for detecting hydrogen and preparation method thereof
  • Label color band for detecting hydrogen and preparation method thereof

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preparation example Construction

[0059] The invention provides a method for preparing a label ribbon for detecting hydrogen, comprising the steps of:

[0060] The hydrogen-sensitive label ribbon is obtained by modifying the noble metal quantum dots on the surface of the hydrogen-sensitive material substrate by ultraviolet light reduction method.

[0061] The invention detects the corresponding concentration of hydrogen in the environment by utilizing changes in the reaction structure of the hydrogen-sensitive material and hydrogen to cause changes in optical signals such as emissivity, transmittance, and wavelength. And by using the ultraviolet light reduction method to modify the surface of the hydrogen-sensitive material with precious metals, while increasing the specific surface area of ​​the sensitive layer, the sensitivity of the label ribbon to hydrogen can be improved, and the hydrogen can be absorbed and responded faster.

[0062] In a preferred embodiment of the present invention, the noble metal inc...

Embodiment 1

[0082] The preparation method of the label ribbon for detecting hydrogen described in this embodiment is as follows:

[0083] (1) Dissolve 2.42g of sodium molybdate dihydrate in 30mL of deionized water, then drop into it 6.25mL of concentrated nitric acid (mass concentration is 70±2%), and keep stirring for 30min to obtain precursor solution A; The bulk solution A was transferred to a clean reaction kettle, placed in a constant temperature reaction box at 260°C, and after continuous reaction for 96 hours, it was naturally cooled to room temperature to obtain material B;

[0084] (2) Wash material B with deionized water until neutral to remove MoO 3 After other impurities, the MoO in the solution 3 The nanowires were mechanically stirred for 24 hours to obtain a slurry C; the slurry C was poured into a mold, and dried at a constant temperature of 50°C for 24 hours to obtain a molybdenum oxide nanowire paper substrate;

[0085] (4) 0.003g of PdCl 2 Pour the powder into a clea...

Embodiment 2

[0089] The preparation method of the label ribbon for detecting hydrogen described in this embodiment is as follows:

[0090] (1) Dissolve 2.42g of sodium molybdate dihydrate in 30mL of deionized water, then drop into it 6.25mL of concentrated nitric acid (mass concentration is 70±2%), and keep stirring for 30min to obtain precursor solution A; The bulk solution A was transferred to a clean reaction kettle, placed in a constant temperature reaction box at 260°C, and after continuous reaction for 96 hours, it was naturally cooled to room temperature to obtain material B;

[0091] (2) Wash material B with deionized water until neutral to remove MoO 3 After other impurities, the MoO in the solution 3The nanowires were mechanically stirred for 24 hours to obtain a slurry C; the slurry C was poured into a mold, and dried at a constant temperature of 50°C for 24 hours to obtain a molybdenum oxide nanowire paper substrate;

[0092] (4) Pour the chloroplatinic acid powder of 0.006g ...

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Abstract

The invention relates to the technical field of gas detection, in particular to a label color band for detecting hydrogen and a preparation method thereof. The preparation method comprises the following steps: a noble metal quantum dot is modified on the surface of a hydrogen sensitive material substrate by an ultraviolet reduction method to obtain the label color band for detecting hydrogen. In the label color band for detecting hydrogen, after the hydrogen-sensitive material is reacted with the hydrogen, the change of the optical signals such as the emissivity, the transmittance, the wavelength and the like is caused, so that the corresponding hydrogen concentration in the environment is detected, the noble metal quantum dots are modified on the surface of the hydrogen-sensitive materialby adopting the ultraviolet reduction method, the sensitivity of the label color band to the hydrogen is improved while the specific surface area of the sensitive layer is increased, and the hydrogencan be adsorbed more quickly and the response can be carried out.

Description

technical field [0001] The invention relates to the technical field of gas detection, in particular to a label ribbon for detecting hydrogen and a preparation method thereof. Background technique [0002] The energy crisis caused by the decrease of fossil energy such as oil and coal forces people to focus their research on renewable clean energy. As a renewable energy source with a wide range of raw materials, hydrogen energy has attracted people's attention. As an efficient and clean fuel and reducing gas, hydrogen has been widely used in many fields such as metallurgy, petrochemical, medical treatment, and medicine. However, hydrogen has a small molecular weight and is colorless and odorless, making it easy to leak and difficult to detect. Most of the hydrogen used in industrial production is high-concentration hydrogen, but the limit explosion concentration of hydrogen in the air is low and the explosion is powerful, which brings huge safety hazards when using, storing a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
CPCG01N21/783
Inventor 胡永明黎震宇游开开顾豪爽
Owner HUBEI UNIV
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