Preparation method and application of CuO-ZnO flower-like structure composite sensitive material

A composite sensitive, flower-like structure technology, applied in the analysis of materials, material resistance, material analysis by electromagnetic means, etc., can solve the problems of large and cumbersome detection instruments, difficult real-time online monitoring, limited application, etc., to achieve good detection characteristics, Simple and feasible operation, accelerate the effect of fast transmission and diffusion

Pending Publication Date: 2021-07-23
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the detection method based on spectral technology and chromatography technology has high accuracy and good stability, its application in some fields is limited due to the large-scale and cumbersome detection equipment, high price, and difficulty in real-time online monitoring.

Method used

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  • Preparation method and application of CuO-ZnO flower-like structure composite sensitive material
  • Preparation method and application of CuO-ZnO flower-like structure composite sensitive material
  • Preparation method and application of CuO-ZnO flower-like structure composite sensitive material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Preparation of ZnO flower-like structure materials

[0033] Step 1: Weigh 4.76 g of zinc nitrate and 4.82 g of urea in sequence, dissolve them in a mixed solution of 160 mL of distilled water and ethylene glycol (volume ratio 1:1), and stir magnetically for 30 minutes to form a clear solution. Hydrothermal synthesis of precursor reaction solution.

[0034] Step 2: Transfer the precursor reaction solution prepared in Step 1 into a polytetrafluoroethylene-lined stainless steel autoclave with a filling degree of 80%, and seal it.

[0035] Step 3: Place the reaction kettle in Step 2 in an oven, keep it warm at 100° C. for 12 hours, and then cool it down.

[0036] Step 4: Centrifuge the reactant solution prepared in Step 3 to obtain a precipitate, and then use distilled water and absolute ethanol to alternately centrifuge and wash 6 times to wash away residual ions in the reaction solution.

[0037] Step 5: Place the product of Step 4 in a drying oven at a constant tem...

Embodiment 2

[0043] (1) Preparation of CuO-ZnO flower-like structure composite sensitive material

[0044] Step 1: Weigh 4.76 g of zinc nitrate, 0.03 g of copper nitrate, and 4.82 g of urea in sequence, dissolve them in a mixed solution of 160 mL of distilled water and ethylene glycol (volume ratio 1:1), stir magnetically for 30 minutes, and form a clear The solution is prepared as a hydrothermal synthesis precursor reaction solution.

[0045] Steps 2, 3, 4, 5 and 6 are the same as in Example 1.

[0046] (2) Structural characterization of CuO-ZnO flower-like composite sensitive materials

[0047] The crystal structure of the product was characterized by XRD powder diffractometer (XRD, PANalytical X’Pert Pro). From figure 1 It can be seen that in addition to the monoclinic ZnO characteristic peak, there is no CuO characteristic peak in the sample, which may be due to the lower CuO content and smaller particle size. The characteristic peaks of product diffraction are all sharp without any ...

Embodiment 3

[0049] (1) Preparation of CuO-ZnO flower-like structure composite sensitive material

[0050] Step 1: Weigh 4.76 g of zinc nitrate, 0.09 g of copper nitrate, and 4.82 g of urea in turn, dissolve them in a mixed solution of 160 mL of distilled water and ethylene glycol (volume ratio 1:1), and stir magnetically for 30 minutes until complete Dissolved to prepare a hydrothermal synthesis precursor reaction solution. Dissolve it in a mixed solution prepared with 40 mL distilled water and 40 mL ethylene glycol, and stir it magnetically for 30 minutes to form a clear solution, which is prepared as a reaction solution for the precursor of hydrothermal synthesis.

[0051] Steps 2, 3, 4, 5 and 6 are the same as in Example 1.

[0052] (2) Structural characterization of CuO-ZnO flower-like composite sensitive materials

[0053] The crystal structure of the product was characterized by XRD powder diffractometer (XRD, PANalytical X’Pert Pro). From figure 1 It can be seen that in additio...

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Abstract

The invention discloses a preparation method and application of a CuO-ZnO flower-like structure composite sensitive material, and relates to a preparation method and application of a sensitive material. The preparation method comprises the steps that zinc nitrate and copper nitrate which are low in price and easy to obtain serve as raw materials, and a stable solution is prepared in a mixed solution of distilled water and ethylene glycol; and the prepared solution is hydrothermally synthesized into a precursor of the composite sensitive material under a low-temperature condition, then the precursor is centrifuged, washed, dried, calcined and the like to obtain a final product, and no harmful additive or solvent is used in the whole production process. The prepared CuO-ZnO composite sensitive material keeps an effective high surface area to facilitate adsorption and desorption of target gas, avoids agglomeration of a secondary structure unit, has good surface permeability, accelerates rapid transmission and diffusion of gas, obtains good acetone gas detection characteristics, and the material is applied to a sensor and is expected to have important application in the field of industrial safety.

Description

technical field [0001] The invention relates to a method for preparing a sensitive material and its application, in particular to a method for preparing a composite sensitive material with a CuO-ZnO flower structure and its application. Background technique [0002] Acetone is a volatile, colorless liquid that is easily soluble in water and other organic solvents. It is widely used in the production of pesticides, fibers, coatings, etc. Volatile acetone gas is toxic and irritating, and endangers human health. When the human body inhales a certain amount of acetone gas, it will stimulate the nasal cavity and throat, and produce an anesthetic effect on the central nervous system, causing symptoms such as headache, weakness, drowsiness, nausea, vomiting, and coma. At the same time, acetone is also a highly flammable gas. If it encounters an open flame or high heat, it will cause an explosion safety accident. In addition, medical research has found that acetone is a typical ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12C01G9/02C01G3/02
CPCG01N27/127C01G9/02C01G3/02C01P2002/72C01P2004/03
Inventor 孟丹潘禹伯邬胡倩李训李旭蕃谢书澳
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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