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A kind of preparation method of reusable organic gas detection film

A technology for detecting thin films and organic gases, applied in chemical instruments and methods, membrane technology, measuring devices, etc., can solve problems such as expensive instruments

Active Publication Date: 2018-11-13
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The equipment used by the two methods is more expensive
And the operation requires professionals

Method used

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  • A kind of preparation method of reusable organic gas detection film
  • A kind of preparation method of reusable organic gas detection film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1) Prepare the same concentration of K 3 Co(CN) 6 Hydrochloric acid aqueous solution and CoCl 2 Aqueous hydrochloric acid solution, K 3 Co(CN) 6 with CoCl 2 The concentration of the solution is 0.01M, the concentration of hydrochloric acid is 0.1M, and the PVDF non-woven fabric is cut into a suitable shape as a support;

[0019] 2) Control the ambient temperature at 25°C, immerse the support in deposition solution A for 5 minutes and take it out; then immerse the support in deionized water for 10 seconds and take it out; then immerse the support in deposition solution B for 5 minutes and take it out; finally The support was immersed in deionized water for 10 s and then taken out. The above operation was repeated 100 times. Dry the prepared film. The characterization figure of the prepared reusable organic gas detection film by scanning electron microscope (SEM) is shown in figure 1 It can be seen from the figure that the particle size of the film is uniform, and...

Embodiment 2

[0021] 1) Prepare the same concentration of K 3 Fe(CN) 6 Nitric acid aqueous solution and CoCl 2 Aqueous solution of nitric acid, K 3 Fe(CN) 6 with CoCl 2 The concentration of the solution is 0.05M, the concentration of nitric acid is 0.01M, and the ITO conductive glass support is ultrasonically cleaned with acetone, ethanol and deionized water for ten minutes respectively.

[0022] 2) Control the ambient temperature at 25°C, immerse the support in deposition solution A for 10 minutes and take it out; then immerse the support in deionized water for 10 seconds and take it out; then immerse the support in deposition solution B for 10 minutes and take it out; finally The support was immersed in deionized water for 10 s and then taken out. The above operation was repeated 80 times. Dry the prepared film.

Embodiment 3

[0024] 1) Prepare the same concentration of K 3 Co(CN) 6 Aqueous sulfuric acid solution and ZnCl 2 Aqueous solution of sulfuric acid, K 3 Co(CN) 6 with ZnCl 2 The concentration of the solution is 0.1M, the concentration of sulfuric acid is 0.5M, and the ITO conductive glass support is ultrasonically cleaned with acetone, ethanol and deionized water for ten minutes respectively.

[0025] 2) Control the ambient temperature at 35°C, immerse the support in deposition solution A for 1 min and take it out; then immerse the support in deionized water for 30 seconds and take it out; then immerse the support in deposition solution B for 1 min and take it out; finally The support was immersed in deionized water for 30 s and then taken out. The above operation was repeated 50 times. Dry the prepared film.

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Abstract

The invention relates to a preparation method of a reusable organic gas detection film. The preparation method comprises the specific following steps that deposition solutions A and B are prepared; film deposition is conducted on a supporting body, and the supporting body is immersed in the deposition solution A and is taken out after a period of time; then, the supporting body is immersed into deionized water and is taken out after a period of time; the supporting body is immersed into the deposition solution B and is taken out after a period of time; finally, the supporting body is immersed into deionized water and is taken out after a period of time to complete deposition of a layer of film. The prepared film can be used for detecting multiple organic volatile substances, is high in response speed and produces different color responses to different types of volatile substances, and the color of the film in the environment containing no volatile substance can be rapidly recovered. The film preparation method is simple in process and low in cost and has a good large-scale production prospect.

Description

technical field [0001] The invention relates to a preparation method of a reusable organic gas detection film. The prepared film can be used to detect a variety of organic volatiles such as ethanol, acetone, N-N-dimethylformamide, etc. The detection speed is fast, and it has different color responses to different organic volatiles, and it does not contain organic volatiles The color of the film can be quickly restored under the environment. Background technique [0002] Since the accidental discovery of Prussian blue in Germany in the early 18th century, analogues of Prussian blue have also flourished, and their various properties have been widely studied. Some transition metal ions in some Prussian blue analogues may change color due to changes in the coordination environment. With the development of science and technology, people pay more and more attention to the green and healthy living environment. Among them, volatile organic compounds (VOCs) will cause great harm t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/02B01D69/10B01D67/00G01N21/78
CPCB01D67/0069B01D69/105B01D71/022G01N21/783G01N2021/775
Inventor 金万勤任小明汤化宇储震宇
Owner NANJING TECH UNIV
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