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Humidity sensor based on TiO2 composite material

A technology of humidity sensor and composite material, which is applied in the analysis of materials, material resistance, material analysis by electromagnetic means, etc., can solve the problems of narrow temperature application range, application limitation, long-term response and so on

Inactive Publication Date: 2017-12-05
韦德永
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, in the prior art, the relative humidity detection range and temperature application range of the humidity sensor are narrow, and problems such as low sensitivity have always existed. The performance of the humidity sensor depends on the humidity-sensitive material. important content of
The morphology of titanium oxide-based materials is controllable, and nanoparticles, nanorods, or porous structures can be generated, but pure phase TiO 2 High resistance, low sensitivity, slow response recovery, external heating source and long response time are required, which limits its application in humidity sensors

Method used

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  • Humidity sensor based on TiO2 composite material

Examples

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preparation example Construction

[0024] The above TiO 2 The preparation steps of the composite material are as follows:

[0025] Step 1, get natural graphite and concentrated sulfuric acid to mix, stir slowly to make it mix uniformly, obtain the reaction solution that 60ml graphite concentration is 45g / L, then place this reaction solution in an ice bath, mix 6g KMnO 4 Slowly add to the reaction solution, after 2 hours, place the reaction device in a water bath at 40°C, continue to stir for 2 hours, then add 100ml of deionized water dropwise to the reaction solution, and after dilution, raise the temperature of the reaction solution to 95°C and continue the reaction for 15 minutes. Add 280ml of deionized water and 6ml of H to the reaction solution 2 o 2 To terminate the reaction, the khaki product was obtained by centrifugation, washed and centrifuged repeatedly with 1.25mol / L dilute hydrochloric acid and the supernatant was discarded until the supernatant contained SO 4 2- After washing, the obtained khak...

Embodiment 1

[0030] In this embodiment, a TiO-based 2 A resistive humidity sensor of composite material, the humidity sensor includes a ceramic substrate, TiO coated on the surface of the ceramic substrate 2 Composite material, prepared on TiO 2 Metal counter electrode on composite surface.

[0031] The above TiO 2 The preparation steps of the composite material are as follows:

[0032] Step 1, get natural graphite and concentrated sulfuric acid to mix, stir slowly to make it mix uniformly, obtain the reaction solution that 60ml graphite concentration is 45g / L, then place this reaction solution in an ice bath, mix 6g KMnO 4 Slowly add to the reaction solution, after 2 hours, place the reaction device in a water bath at 40°C, continue to stir for 2 hours, then add 100ml of deionized water dropwise to the reaction solution, and after dilution, raise the temperature of the reaction solution to 95°C and continue the reaction for 15 minutes. Add 280ml of deionized water and 6ml of H to the ...

Embodiment 2

[0040] In this embodiment, a TiO-based 2 A resistive humidity sensor of composite material, the humidity sensor includes a ceramic substrate, TiO coated on the surface of the ceramic substrate 2 Composite material, prepared on TiO 2 Metal counter electrode on composite surface.

[0041] The above TiO 2 The preparation steps of the composite material are as follows:

[0042] Step 1, get natural graphite and concentrated sulfuric acid to mix, stir slowly to make it mix uniformly, obtain the reaction solution that 60ml graphite concentration is 45g / L, then place this reaction solution in an ice bath, mix 6g KMnO 4 Slowly add to the reaction solution, after 2 hours, place the reaction device in a water bath at 40°C, continue to stir for 2 hours, then add 100ml of deionized water dropwise to the reaction solution, and after dilution, raise the temperature of the reaction solution to 95°C and continue the reaction for 15 minutes. Add 280ml of deionized water and 6ml of H to the ...

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Abstract

The invention relates to a humidity sensor based on a TiO2 composite material, the humidity sensor comprises a ceramic substrate, a TiO2 composite layer coating the surface of the ceramic substrate, and a metal counter electrode prepared on the surface of the TiO2 composite layer, the TiO2 composite material is a TiO2 / graphene / metal nanowire / Fe3O4 composite material, TiO2 is TiO2 nanoparticles, Fe3O4 is Fe3O4 nanoparticles, and graphene is a carrier of the TiO2 nanoparticles and the Fe3O4 nanoparticles.

Description

technical field [0001] The application relates to the field of humidity sensor technology, in particular to a TiO-based 2 Composite humidity sensor. Background technique [0002] Nowadays, the status of sensors in human life is beyond doubt. For different application scenarios, people have developed different sensors. Alcohol testers, ion sensing smoke, fire detectors, etc. are widely used sensors. At the same time, humidity sensors have also been widely used in daily life. For example, humidity detection is used in the production environment of paper, optical glass, and electronic components, as well as in the storage of tobacco, tea, and food. In addition, humidity adjustment in air-conditioned rooms, monitoring of atmospheric humidity, and automatic control of washing machine drying systems are also required. Humidity detection is needed, so it is of practical significance to study the preparation of humidity sensors with excellent humidity sensing performance and pract...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12C01G49/08
CPCG01N27/127C01G49/08G01N27/121
Inventor 韦德永
Owner 韦德永
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