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N-butanol gas sensitive material and preparation method thereof

A gas-sensitive material and technology for sensitive materials, applied in the field of n-butanol gas-sensitive materials and their preparation, to achieve the effects of high sensitivity, increased thickness, and increased contact area

Inactive Publication Date: 2020-09-08
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Research results in recent years have shown that ZnO also has high gas sensitivity to n-butanol, but its response-recovery time is generally above 10s

Method used

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  • N-butanol gas sensitive material and preparation method thereof
  • N-butanol gas sensitive material and preparation method thereof

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preparation example Construction

[0031] The second aspect of the present invention provides a kind of preparation method of n-butanol gas sensitive material, comprises the steps:

[0032] 1). Weigh zinc acetate dihydrate, indium nitrate monohydrate and polyvinylpyrrolidone, add them into deionized water, stir until dissolved, and make a solution;

[0033] 2). Drying the solution prepared in step 1) of the preparation to obtain a light yellow transparent gel;

[0034] 3). Put the above-mentioned gel into a calciner for firing to obtain a finished product.

[0035] In the step 1), the mass ratio of zinc acetate dihydrate, indium nitrate monohydrate and polyvinylpyrrolidone is 3:0.15-1:2-6; the mass ratio of deionized water to polyvinylpyrrolidone is 40-60 :1. The mass ratio of zinc acetate dihydrate and indium nitrate monohydrate cannot be lower than 3:1. If it is lower than 3:1, white powder will precipitate during the drying process, and transparent gel blocks cannot be obtained. When zinc acetate dihydrate...

Embodiment 1

[0044] 1): Weigh zinc acetate dihydrate, indium nitrate monohydrate and polyvinylpyrrolidone (K88-96) according to the mass ratio of 3:1:3, add them to deionized water, deionized water and polyvinylpyrrolidone (K88-96) The mass ratio is 40:1, stir until completely dissolved, and form a solution.

[0045] 2): Dry the prepared mixed solution at a drying temperature of 70° C. to completely evaporate the water to obtain a mixture of zinc acetate, indium nitrate and polyvinylpyrrolidone (K88-96).

[0046] 3): Put the mixture of zinc acetate, indium nitrate and polyvinylpyrrolidone (K88-96) into the calciner, heat the calciner to 600°C, keep it warm for 2 hours, and finally take out the In from the calciner 2 o 3 Doped ZnO finished product.

[0047] The samples were tested to obtain figure 1 , figure 2 and image 3 . Depend on figure 1 It can be seen that the sample XRD pattern prepared by using the method of the present invention contains In 2 o 3 and ZnO two phases, indi...

Embodiment 2

[0050] 1): Weigh zinc acetate dihydrate, indium nitrate monohydrate and polyvinylpyrrolidone (K88-96) according to the mass ratio of 3:0.6:2, add them to deionized water, deionized water and polyvinylpyrrolidone (K88-96) The mass ratio is 40:1, stir until completely dissolved, and form a solution.

[0051] 2): Dry the prepared mixed solution at a drying temperature of 40° C. to completely evaporate the water to obtain a mixture of zinc acetate, indium nitrate and polyvinylpyrrolidone (K88-96).

[0052] 3): Put the mixture of zinc acetate, indium nitrate and polyvinylpyrrolidone (K88-96) into the calciner. 2 o 3 Doped ZnO finished product.

[0053] Product characterization as Figure 4 shown by Figure 4 It can be seen that the microscopic appearance of the product is a micron three-dimensional structure with a diameter of about 1-2.5 μm, and each micron three-dimensional structure is composed of a nanosheet structure. Adopt Zhengzhou Weisheng WS-30 gas sensitivity test sy...

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Abstract

The invention discloses a n-butanol gas sensitive material and a preparation method thereof. The method comprises the following steps: 1) weighing zinc acetate dihydrate, indium nitrate monohydrate and polyvinylpyrrolidone, adding the weighed materials into deionized water, and performing stirring until the weighed materials are dissolved to prepare a solution; 2) drying the solution prepared in the step 1) to obtain faint yellow transparent gel; and 3) putting the above gel in a calcination furnace, and performing firing to obtain the finished product. The n-butanol gas sensitive material disclosed by the invention has a loose structure, a uniform size, and a micron three-dimensional structure, and the micron three-dimensional structure is composed of a two-dimensional sheet structure; the n-butanol gas sensitive material has higher sensitivity to n-butanol and a very fast response-recovery speed; the preparation method of the n-butanol gas sensitive material is simple, and the morphology is controllable.

Description

technical field [0001] The invention belongs to the technical field of inorganic material preparation and gas sensors, and relates to a n-butanol gas sensitive material and a preparation method thereof. Background technique [0002] N-butanol is a colorless, transparent, volatile, low-toxic liquid, widely used in plastics, rubber, dyes and other fields. Butanol is flammable and explosive, and its vapor can form an explosive mixture in contact with air, which can cause combustion or even explode when exposed to open flame or high temperature. In addition, n-butanol also has irritating and paralyzing effects. Prolonged exposure to n-butanol is prone to symptoms such as headache, dizziness, drowsiness, mental disorder, and coma, and the liquid is also irritating to the eyes and skin. Therefore, it is of great significance to strengthen the detection of n-butanol gas concentration to ensure safe production and health. [0003] Metal oxide semiconductor gas sensors have the adv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G9/02G01N27/12
CPCC01G9/02C01P2002/72C01P2004/03C01P2004/04C01P2004/30C01P2004/50C01P2004/61C01P2004/62G01N27/126G01N27/127
Inventor 王新震刘凤军宋晓杰崔洪芝
Owner SHANDONG UNIV OF SCI & TECH
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