Preparation method and gas-sensitive application of ultra-thin zinc oxide nanosheet

A zinc oxide nano- and ultra-thin technology, applied in the field of gas sensors, can solve the problem of better response ability and gas selectivity of ultra-thin two-dimensional zinc oxide nanomaterials, and there are few reports on ultra-thin two-dimensional metal oxide materials. The synthesis method is complex and other problems, to achieve the effects of good response ability and gas selectivity, low synthesis cost, and simple synthesis method

Inactive Publication Date: 2019-12-03
SHANGHAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The high specific surface area of ​​two-dimensional nanosheets and more exposed active sites on the surface are the ideal nanomaterial morphology that people have been pursuing. However, there are few reports on the research of ultra-thin two-dimensional metal oxide materials by traditional preparation methods.
Among them, zinc oxide material has been considered as an excellent semiconductor gas-sensing material based on high activity, strong stability and appropriate energy band structure. It is a simple and convenient way to prepare uniform ultra-thin two-dimensional zinc oxide nanomaterials to improve gas-sensing performance. Effective way, currently the cost of preparing ultra-thin two-dimensional zinc oxide nanomaterials is high, and the synthesis method is complicated, and it is not clear that ultra-thin two-dimensional zinc oxide nanomaterials have better response ability and gas selectivity to specific gases

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  • Preparation method and gas-sensitive application of ultra-thin zinc oxide nanosheet
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  • Preparation method and gas-sensitive application of ultra-thin zinc oxide nanosheet

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Embodiment 1

[0025] see Figure 1-4 , the present invention provides a technical solution: a preparation method of ultra-thin zinc oxide nanosheets, comprising the following steps:

[0026] (1) Preparation of ultra-thin zinc oxide nanosheet precursor: Dissolve zinc nitrate hexahydrate and sodium lauryl sulfate in deionized water and stir evenly, add sodium hydroxide solution dropwise to the solution after stirring, wait until After the dropwise addition, stir at room temperature to make it fully react, centrifuge the reacted product repeatedly with deionized water, and dry until the bulk precursor is obtained for later use;

[0027] (2) Preparation of ultra-thin zinc oxide nanosheets: After grinding the bulk precursor prepared in step 1, take the precursor powder and disperse it in n-butanol solvent, and stir at the corresponding temperature until the precursor powder and n-butanol The solvent is completely reacted, the product after the complete reaction is centrifuged at low speed and t...

Embodiment 2

[0038] A preparation method of ultra-thin zinc oxide nanosheets, comprising the steps of:

[0039] (1) Preparation of ultra-thin zinc oxide nanosheet precursor: Dissolve zinc nitrate hexahydrate and sodium lauryl sulfate in deionized water and stir evenly, add sodium hydroxide solution dropwise to the solution after stirring, wait until After the dropwise addition, stir at room temperature to make it fully react, centrifuge the reacted product repeatedly with deionized water, and dry until the bulk precursor is obtained for later use;

[0040] (2) Preparation of ultra-thin zinc oxide nanosheets: After grinding the bulk precursor prepared in step 1, take the precursor powder and disperse it in n-butanol solvent, and stir at the corresponding temperature until the precursor powder and n-butanol The solvent is completely reacted, the product after the complete reaction is centrifuged at low speed and the upper and middle layer suspension is taken, and then the precipitate is obta...

Embodiment 3

[0051] A preparation method for ultra-thin zinc oxide nanosheets, comprising the steps of:

[0052](1) Preparation of ultra-thin zinc oxide nanosheet precursor: Dissolve zinc nitrate hexahydrate and sodium lauryl sulfate in deionized water and stir evenly, add sodium hydroxide solution dropwise to the solution after stirring, wait until After the dropwise addition, stir at room temperature to make it fully react, centrifuge the reacted product repeatedly with deionized water, and dry until the bulk precursor is obtained for later use;

[0053] (2) Preparation of ultra-thin zinc oxide nanosheets: After grinding the bulk precursor prepared in step 1, take the precursor powder and disperse it in n-butanol solvent, and stir at the corresponding temperature until the precursor powder and n-butanol The solvent is completely reacted, the product after the complete reaction is centrifuged at low speed and the upper and middle layer suspension is taken, and then the precipitate is obta...

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Abstract

The invention discloses a preparation method and gas-sensitive application of an ultra-thin zinc oxide nanosheet. The preparation method comprises the following steps that zinc nitrate hexahydrate andlauryl sodium sulfate are dissolved into deionized water to be stirred evenly, a sodium hydroxide solution is dropwise added into an evenly-stirred solution, stirring is conducted at the corresponding temperature till precursor powder and an n-butyl alcohol solvent react completely, and a product obtained after complete reaction is centrifuged at the low speed for taking a suspension on the upper-middle layer. A gas-sensitive application method of the ultra-thin zinc oxide nanosheet comprises the steps that a few zinc oxide nanosheets are placed into a mortar, then a small quantity of adhesives are dropwise added, a ceramic tube of a gas-sensitive element is evenly coated with a mushy material, and the ceramic tube is placed under a drying device to be dried, calcined in calcination equipment for 2-6 hours at the temperature of 200-350 DEG C and cooled for standby application. According to the preparation method and the gas-sensitive application of the ultra-thin zinc oxide nanosheet,a synthesis method is simple, the synthesis cost is low, and a gas sensor prepared from the ultra-thin zinc oxide nanosheet has the good response ability and gas selectivity to acetone, and has wideapplication prospects in the aspect of detecting the acetone content.

Description

technical field [0001] The invention relates to the technical field of gas sensors, in particular to a preparation method of ultra-thin zinc oxide nanosheets and its gas-sensing application. Background technique [0002] The controllable synthesis of nanomaterials is a research hotspot and difficulty in recent years. The surface effect, size effect and quantum effect of the material at the nanoscale make it show many peculiar properties, such as in optics, heat, electricity, magnetism, etc. The changes in science and mechanics have shown unique advantages in many aspects. The high specific surface area of ​​two-dimensional nanosheets and more exposed active sites on the surface are the ideal nanomaterial morphology that people have been pursuing. However, there are few reports on the research of ultra-thin two-dimensional metal oxide materials by traditional preparation methods. Among them, zinc oxide material has been considered as an excellent semiconductor gas-sensing ma...

Claims

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Application Information

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IPC IPC(8): C01G9/02G01N27/00B82Y40/00
CPCC01G9/02G01N27/00B82Y40/00C01P2004/04C01P2002/72
Inventor陈杨薛正刚徐甲强李志鑫马志恒
OwnerSHANGHAI UNIV