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High-sensitivity alcohol-sensitive gas sensor, preparation method thereof, and preparation method of mesoporous SnO2 material

A gas sensor, mesoporous technology, applied in nanotechnology, analytical materials, instruments, etc. for materials and surface science, can solve the problems of grain agglomeration, poor crystal quality and thermal stability, and achieve increased contact area, Avoidance of impurities and structural defects, effect of short response-recovery time

Active Publication Date: 2015-01-28
XIAN TECHNOLOGICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the existing technical problems, the present invention provides a high-sensitivity wine-sensitive gas sensor and its preparation method, mesoporous SnO 2 The preparation method of the material can overcome the problems of serious grain agglomeration, poor crystallization quality and thermal stability in the prior art

Method used

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  • High-sensitivity alcohol-sensitive gas sensor, preparation method thereof, and preparation method of mesoporous SnO2 material
  • High-sensitivity alcohol-sensitive gas sensor, preparation method thereof, and preparation method of mesoporous SnO2 material
  • High-sensitivity alcohol-sensitive gas sensor, preparation method thereof, and preparation method of mesoporous SnO2 material

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Embodiment 1

[0044] In the present invention, CTAB and dodecylamine are used as templates, and SnC l4 ·5H 2 O as tin source, mesoporous SnO was synthesized by a combination of double-template method and hydrothermal method 2 nanomaterials.

[0045] Mesoporous SnO 2 The specific preparation method of nanomaterial preparation is:

[0046] (1) Dissolve 3.1g of CTAB in 40mL of water and stir in a water bath at 40°C to obtain a surfactant solution.

[0047] (2) Add 0.11 g of dodecylamine into the surfactant solution, and stir until the solution is uniform.

[0048] (3) Add 1.05g of ammonia water with a mass percentage of 25% to 20mL of water to make an ammonia solution.

[0049] (4) Add the aqueous ammonia solution prepared in (3) into the mixture of the surfactant solution and dodecylamine prepared in (2), stir evenly, and continue stirring for 2 hours to obtain a template solution.

[0050] (5) Add 10.5g of SnC l4 ·5H 2 O was dissolved in 80 mL of water and added dropwise to the templ...

Embodiment 2

[0055] Mesoporous SnO 2 The specific methods of nanomaterials are:

[0056] (1) Dissolve 3.1g of CTAB in 40mL of water and stir in a water bath at 40°C to obtain a surfactant solution.

[0057] (2) Add 0.11 g of dodecylamine into the surfactant solution, and stir until the solution is uniform.

[0058] (3) Add 2.1g of 25% ammonia by mass to 20mL of water to make an ammonia solution.

[0059] (4) Add the aqueous ammonia solution prepared in (3) into the mixture of the surfactant solution and dodecylamine prepared in (2), stir evenly, and continue stirring for 2 hours to obtain a template solution.

[0060] (5) Add 10.5g of SnC l4 ·5H 2 O was dissolved in 80 mL of water and added dropwise to the template solution to obtain a white slurry-like solution, and magnetic stirring was continued for 3 h.

[0061] (6) React the white slurry-like solution prepared in (5) under high pressure at 160°C for 12 hours, cool, filter, and wash repeatedly with deionized water and absolute eth...

Embodiment 3

[0065] Mesoporous SnO 2 The specific methods of nanomaterials are:

[0066] (1) Dissolve 3.1g of CTAB in 40mL of water and stir in a water bath at 40°C to obtain a surfactant solution.

[0067] (2) Add 0.11 g of dodecylamine into the surfactant solution, and stir until the solution is uniform.

[0068] (3) Add 3.05g of ammonia water with a mass percentage of 25% to 20mL of water to make an ammonia solution.

[0069] (4) Add the aqueous ammonia solution prepared in (3) into the mixture of the surfactant solution and dodecylamine prepared in (2), stir evenly, and continue stirring for 2 hours to obtain a template solution.

[0070] (5) 10.5gSnC l4 ·5H 2 O was dissolved in 80 mL of water and added dropwise to the template solution to obtain a white slurry-like solution, and magnetic stirring was continued for 3 h.

[0071] (6) React the white slurry-like solution prepared in (5) under high pressure at 160°C for 12 hours, cool, filter, and wash repeatedly with deionized water...

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Abstract

The invention discloses a preparation method of a mesoporous SnO2 material. The preparation method comprises the following steps of dissolving 3.1g of CTAB (Cetyl Trimethyl Ammonium Bromide) into 40mL of water to obtain a surfactant solution; adding 0.11g of dodecylamine into the surfactant solution; adding a prepared ammonia water solution into a mixed solution to obtain a template agent solution; dissolving 10.5g of SnCl4.5H2O into 80mL of water and adding the prepared solution into the template agent solution to obtain a white slurry-like solution; performing reaction on the white slurry-like solution at the temperature of 160 DEG C for 12h, roasting the treated white slurry-like solution in air atmosphere, and preserving heat for 1h to prepare the mesoporous SnO2 material. The invention further discloses a high-sensitivity alcohol-sensitive gas sensor and a preparation method thereof. Impurities and structural defects caused by after-treatment such as high-temperature calcination or ball milling can be avoided, high-temperature roasting crystallization is not needed, and hard powder agglomeration which is difficult to avoid in the high-temperature roasting process is reduced.

Description

technical field [0001] The invention relates to the technical field of gas-sensitive materials, in particular to a high-sensitivity wine-sensitive gas sensor and its preparation method, mesoporous SnO 2 The method of preparation of the material. Background technique [0002] The so-called mesoporous materials (Mesoporous materials) refer to materials with a pore size between 2-50nm. Mesoporous materials have tubular, worm-like, spherical and other pore structures, and have the characteristics of uniform and adjustable pore size, easy functional modification of the surface, and strong adsorption capacity. Increase the specific surface area of ​​the material, which makes it a new type of high-value gas-sensing material. [0003] Mesoporous materials are a typical porous material. The most commonly used preparation method is the template method. According to the different properties of the template itself, the template method can be divided into "soft template" (soft templat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B82B1/00B82B3/00B82Y30/00B82Y40/00G01N33/00
Inventor 于灵敏刘盛韦建松杨冰康梦迪范新会
Owner XIAN TECHNOLOGICAL UNIV
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