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Fabrication method of NO2 gas sensor based on silk protein regulation

A gas sensor, silk protein technology, applied in instruments, scientific instruments, measuring devices, etc., can solve problems such as dependence, and achieve the effects of good linear relationship, good repeatability, and fast response and recovery speed

Active Publication Date: 2021-05-11
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, it solves the problem of relying on high-temperature working environment in the prior art, and can perform NO under ultraviolet light. 2 Gas concentration detection

Method used

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  • Fabrication method of NO2 gas sensor based on silk protein regulation
  • Fabrication method of NO2 gas sensor based on silk protein regulation
  • Fabrication method of NO2 gas sensor based on silk protein regulation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049]The present invention discloses NO prepared based on silk protein regulatory multi-metal oxide composites.2The preparation method of the gas sensor, the preparation method comprising the steps of:

[0050]Step 1: Preparation of nanocomposite; the nanocomposite comprises at least a plurality of metal oxides and mercin, including at least zinc oxide and indium oxide, and the preparation process thereof is as follows:

[0051]Step 11: Preparation of a silk protein solution;

[0052]Step 12: Zinc, nitric acid, silk protein solution, sodium hydroxide, and sodium hydroxide, and mix well, then prepare the nanocomposites by hydrothermal method using hydrothermal.

[0053]Step 2: Preparation NO2gas sensor;

[0054]The nanocomposites prepared in step 1 were placed in a centrifuge tube and ultrasound for 30 minutes to obtain a uniformly dispersed nanocomposite suspension, and then the suspension was transferred to the spray container, and evenly sprayed on the planar electrode. Preparation into NO2gas ...

Embodiment 2

[0079]In the nanocomposite preparation method of Example 1, zinc acetate, an indium nitrate and silk protein mass ratio of 10: 1: 1 and 10: 1: 0, other steps and conditions, and in Example 1 were identical, specific conditions. Corresponding changes and adjustments can be obtained within the defined scope of the invention, and the nanocomposite and NO can be obtained.2Gas sensor, for different concentrations (1, 5, 10, 20 ppm) no2Gas response recovery test (such asfigure 1 The sensitivity and no NO after the gas sensor2The relationship between concentrations, such asimage 3 . As can be seen from the figure, with NO2The increase in concentration, the sensitivity is increased and has a good linear relationship. Zinc acetate, indium nitrate added to the moisture ratio of 10: 1: 1 (egimage 3 The linearity of ZISF is 0.992 compared with zinc acetate, and an indium nitrate is added to the moisture ratio of 10: 1: 0 (such asimage 3 The linearity of Zi) is 0.981.

Embodiment 3

[0081]In Example 1, zinc acetate, an indium nitrate and silk protein ratio of 10: 1: 1: 1: 1: 0, the other steps, and conditions were the same, and the specific conditions were performed within the defined scope of the invention. Corresponding changes and adjustments can be obtained from nanocomposite and NO2Gas sensor, 20 ppmno2Gas perform repeatability test curveFigure 4ZISF. byFigure 4It can be seen that zinc acetate, indium nitrate and silk protein is 10: 1: 1 (such asFigure 4The nanocomposites of ZISF are 10: 1: 0 (eg, the morality ratio of zinc) and zinc nitric acid and silk protein.Figure 4The nanocomposites of Zi) have high sensitivity and have good repetitiveness. The above is shown and described in the present invention and the main features and advantages of the present invention. The above-described embodiments are not limited to the present invention, and are in accordance with the requirements of the present invention without departing from the spirit and scope of the ...

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Abstract

The invention relates to a method for preparing a NO2 gas sensor based on silk protein regulation, and the technology belongs to the field of gas sensors. produced NO 2 The gas sensor uses zinc acetate, indium nitrate, sodium hydroxide, silk protein, lithium bromide and anhydrous sodium carbonate as raw materials, and the nanocomposite material is prepared by hydrothermal method. Then use the spraying method to make a solution of the nanocomposite material and evenly spray it on the flat electrode to form a thin film to prepare a high-performance NO 2 gas sensor. By incorporating a certain amount of silk protein, silk protein is used to control the nanoscale microscopic morphology and spatial distribution of the composite material, thereby improving the NO 2 Performance of the gas sensor. The preparation and production cost of the invention is low, the process is simple, and the prepared sensor device has the advantages of high sensitivity, good linear relationship and the like, and the sensor has good application in environment monitoring.

Description

Technical field[0001]The present invention relates to the field of gas sensors, and in particular, to the preparation method of NO2 gas sensor based on silk protein. The multi-metal oxide composites based on silk protein are detected in ultraviolet light sensor resistance variations.2gas.Background technique[0002]NO2Gas is a toxic gas that is a serious contamination environment and has harmful human body. It produces release from the high temperature combustion process, such as the emissions of motor vehicle exhaust, emissions of boiler exhaust gases. NO2Gas is dissolved in water, producing nitric acid, human body suction NO2After the lung tissue has strong irritation and corrosive, there will be poorly poorly poor edema. NO2Promoting the formation of acid rain, inhibiting the natural growth of crops, pollution water, corrosion trees, buildings, and industrial equipment. Current detection No2Conventional methods have chemical illumination methods, spectroscopy, and so on. However, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/12
CPCG01N27/127
Inventor 高荣发应智花盛卫琴郑鹏
Owner HANGZHOU DIANZI UNIV