Preparation and application of hydrogen sensing material

A technology for sensing materials and hydrogen, which is applied to the analysis of materials, material resistance, and material analysis through electromagnetic means. It can solve problems such as short service life, poor selectivity, and poor stability, and achieve good stability and gas selectivity. Solve the effect of low hydrogen selection sensitivity and good hydrogen sensing performance

Inactive Publication Date: 2019-08-23
NANJING UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Since the development of ZnO sensors, they have been widely studied and used, but there are still some shortcomings, such as poor selectivity, short service life, and poor stability.

Method used

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  • Preparation and application of hydrogen sensing material
  • Preparation and application of hydrogen sensing material

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Embodiment 1

[0021] A preparation of a hydrogen detection material, comprising the following steps:

[0022] Step 1, Zn 2+ / Sn 2+ SnO with a molar ratio of 30:1 2 Preparation of Doped Core-Shell ZnO Microsphere Precursor

[0023] 0.021g of zinc oxide (ZnO) was redispersed in 27mL of ethanol solution, stirred magnetically for 10min, then ultrasonicated for 10min, and then stirred for 10min to form a uniform dispersion, then added 20mg of PVP, stirred magnetically for 20min, as solution A. 0.038g SnCl 2 2H 2 O was dissolved in 60mL of ethanol, stirred magnetically for 10min, then measured 3mL of the solution and added dropwise to solution A during stirring, and continued magnetically stirred for 20min. The mixed solution was transferred to a 50mL reactor, reacted in an oven at 120°C for 24h, and then the reaction product was centrifuged and washed three times with ethanol and water respectively, and then dried in an oven at 80°C for 20h to obtain a light yellow powder.

[0024] Step 2,...

Embodiment 2

[0027] A preparation of a hydrogen detection material, comprising the following steps:

[0028] Step 1, Zn 2+ / Sn 2+ SnO with a molar ratio of 45:1 2 Preparation of Doped Core-Shell ZnO Microsphere Precursor

[0029] 0.021g of zinc oxide (ZnO) was redispersed in 27mL of ethanol solution, stirred magnetically for 10min, then ultrasonicated for 10min, and then stirred for 10min to form a uniform dispersion, then added 20mg of PVP, stirred magnetically for 20min, as solution A. 0.026g SnCl 2 2H 2 O was dissolved in 60mL of ethanol, stirred magnetically for 10min, then measured 3mL of the solution and added dropwise to solution A during stirring, and continued magnetically stirred for 20min. The mixed solution was transferred to a 50mL reactor, reacted in an oven at 120°C for 24h, and then the reaction product was centrifuged and washed three times with ethanol and water respectively, and then dried in an oven at 80°C for 20h to obtain a light yellow powder.

[0030] Step 2,...

Embodiment 3

[0033] A preparation of a hydrogen detection material, comprising the following steps:

[0034] Step 1, Zn 2+ / Sn 2+ SnO with a molar ratio of 60:1 2 Preparation of Doped Core-Shell ZnO Microsphere Precursor

[0035] 0.021g of zinc oxide (ZnO) was redispersed in 27mL of ethanol solution, stirred magnetically for 10min, then ultrasonicated for 10min, and then stirred for 10min to form a uniform dispersion, then added 20mg of PVP, stirred magnetically for 20min, as solution A. 0.018g SnCl 2 2H 2 O was dissolved in 60mL of ethanol, stirred magnetically for 10min, then measured 3mL of the solution and added dropwise to solution A during stirring, and continued magnetically stirred for 20min. The mixed solution was transferred to a 50mL reactor, reacted in an oven at 120°C for 24h, and then the reaction product was centrifuged and washed three times with ethanol and water respectively, and then dried in an oven at 80°C for 20h to obtain a light yellow powder.

[0036] Step 2,...

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Abstract

The invention discloses preparation and application of a hydrogen sensing material. The preparation method comprises the steps of weighing zinc oxide, dispersing the zinc oxide in an ethanol solution,carrying out ultrasonic treatment for 10 minutes after magnetic stirring for 10 minutes, carrying out stirring for 10 minutes to form a uniform dispersed solution, adding PVP, and carrying out magnetic stirring for 20 minutes to obtain a solution A; according to a molar ratio of Zn<2+> to Sn<2+> of 30-60 : 1, preparing stannous chloride dihydrate solutions with different concentrations, dropwiseadding the stannous chloride dihydrate solutions into the solution A in the stirring process, continuously carrying out magnetic stirring, transferring a mixed solution into a reaction kettle, carrying out reacting in a drying oven for 24 hours, carrying out centrifugal washing on a reaction product by using ethanol and water for three times, and carrying out drying in the drying oven at the temperature of 80 DEG C for 20 hours to obtain light yellow powder; and calcining the light yellow powder to obtain core-shell ZnO microspheres with different SnO2 doping amounts. The material is synthesized by adopting a hydrothermal method, and is high in low-concentration hydrogen sensitivity, good in selectivity and simple in preparation process.

Description

technical field [0001] The invention belongs to the technical field of hydrogen detection, and in particular relates to the preparation and application of a hydrogen sensing material. Background technique [0002] With the increasing demand for energy, non-renewable energy sources such as fossil fuels are facing the danger of depletion, and their impact on the environment cannot be ignored. Therefore, the development and utilization of new energy sources has become an increasingly urgent requirement. As a new energy source, hydrogen has attracted more and more attention. It itself is non-toxic, and the heat released by complete combustion is high, and the product after combustion is water, which does not pollute the air. Therefore, it is considered as an ideal clean high-energy fuel. At the same time, hydrogen is also an important industrial raw material, which is widely used in electronics industry, automobile industry, metallurgical industry, petrochemical industry, flo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12
CPCG01N27/125
Inventor 章伟成穗实闵信杰胡烨伟全文静胡雪峰
Owner NANJING UNIV OF TECH
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