A preparation method of composite hollow microspheres for improving the detection performance of triethylamine

A technology of hollow microspheres and triethylamine, which is applied in the preparation of microspheres, microcapsule preparations, measuring devices, etc., to achieve the effects of wide-concentration linear response, increased diffusion and transmission, and enhanced gas-sensing response

Active Publication Date: 2021-09-14
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no W for improving the detection performance of triethylamine. 18 o 49 / Co 3 o 4 Related reports on the preparation process and application of composite hollow microspheres

Method used

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  • A preparation method of composite hollow microspheres for improving the detection performance of triethylamine
  • A preparation method of composite hollow microspheres for improving the detection performance of triethylamine
  • A preparation method of composite hollow microspheres for improving the detection performance of triethylamine

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Embodiment 1

[0027] In this example, 0.2g W 18 o 49 Hollow microsphere powder samples were dispersed in 20mL Co(NO 3 ) 2 In the ethanol solution, after stirring, put it in an oven to volatilize the ethanol to obtain a powder sample, and roast and dry it for 2 hours in an air atmosphere at 300°C to obtain W 18 o 49 / Co 3 o 4 Composite hollow microspheres.

[0028] In this example, W 18 o 49 / Co 3 o 4 Composite hollow microspheres were characterized by TEM, the results are as follows Figure 5 As shown, the sample has a hollow structure, and the spherical shell has a typical layered structure. The diameter of the microsphere is 400-600 microns, but the tube wall is relatively thick; it is characterized by HRTEM, and the results are as follows Image 6 As shown, the spherical shell has a highly crystalline structure, and the lattice fringes correspond to W 18 o 49 The (010) and Co 3 o 4 The (220) crystal plane; its gas sensitivity test, the results are as follows Figure 7 As sh...

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Abstract

The invention belongs to the technical field of semiconductor metal oxide gas sensors, and relates to a method for preparing composite hollow microspheres for improving the detection performance of triethylamine, using tungsten hexachloride and acetic acid as reaction raw materials, ethanol as a solvent, and utilizing hydrothermal synthesis technology Preparation W 18 o 49 hollow microsphere structure, then W 18 o 49 hollow microspheres into Co(NO 3 ) 2 Stir in the ethanol solution until the solvent is completely evaporated, collect the powder material and obtain W after roasting 18 o 49 / Co 3 o 4 Composite hollow microspheres, prepared by W 18 o 49 / Co 3 o 4 The composite hollow microsphere has a porous layered spherical shell with a very large specific surface area, which can provide more active sites for the surface gas-sensing reaction and increase the diffusion and transmission of gas molecules inside the material; and its surface contains a large amount of Co 3 o 4 Nanoparticles construct a large number of p-n heterogeneous interfaces, which can promote the enhancement of the gas-sensing response of triethylamine. They are low in cost, small in size, flexible and portable, and are more suitable for the actual detection of triethylamine.

Description

Technical field: [0001] The invention belongs to the technical field of semiconductor metal oxide gas sensors, and relates to a method for preparing composite hollow microspheres for improving the detection performance of triethylamine, in particular to a method for improving the detection performance of triethylamine. 18 o 49 / Co 3 o 4 A preparation method of composite hollow microspheres. Background technique: [0002] As an important chemical raw material, triethylamine is widely used in medicine, pesticide, high-energy fuel and other industries. Triethylamine is a toxic, flammable, and corrosive volatile compound. Inhalation of triethylamine vapor will cause serious health hazards, such as skin corrosion, vision loss, respiratory system, blood circulation system, and central nervous system. Malfunction of the nervous system, liver, and other mucous membrane tissues. The European Union stipulates that in the working environment containing triethylamine in the air, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/04G01N27/12
CPCB01J13/043G01N27/127
Inventor 张军刘相红徐永善郭向欣
Owner QINGDAO UNIV
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