A kind of preparation method of nanocomposite structure gas sensitive material

A gas-sensing material and nano-composite technology, which is applied in the field of preparation of nano-composite structure gas-sensing materials, can solve the problems of serious stacking effect of nano-structure materials and difficulty in stable assembly, etc. Effects of selectivity and sensitivity, increased surface area and openness

Inactive Publication Date: 2019-12-27
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the surface effect between different nanostructures, the stacking effect of nanostructured materials is serious, so it is still difficult to achieve stable assembly.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] step 1:

[0021] Weigh 15mg of graphene quantum dots and dissolve them in 9.8ml of deionized water to prepare 10mL of graphene oxide quantum dot dispersion with a concentration of 1.5mg / mL; weigh 10mg of titanium dioxide nanotubes and dissolve them in 9.6ml of ethanol to prepare 10mL of concentration 1.0mg / mL titanium dioxide nanotube dispersion;

[0022] Step 2:

[0023] Measure 2ml each of graphene oxide quantum dot dispersion liquid and titanium dioxide nanotube dispersion liquid respectively, add them into the cavity of the air-spray equipment, and deposit graphene oxide quantum dots and titanium dioxide nanotubes on the hydrophilic treated surface by means of simultaneous air spraying. The surface of the interdigitated electrode is then placed in a vacuum drying oven at a temperature of 60 ° C for 2 hours to obtain a film of composite nanostructure formed by graphene oxide quantum dots and titanium dioxide nanotubes;

[0024] Step 3:

[0025] Put the interdigita...

Embodiment 2

[0029] step 1:

[0030] Weigh 20 mg of graphene quantum dots and dissolve them in 9.6 ml of deionized water to prepare 10 mL of graphene oxide quantum dot dispersions with a concentration of 2.0 mg / mL; weigh 10 mg of titanium dioxide nanotubes and dissolve them in 9.6 ml of ethanol to prepare 10 mL of 1.0mg / mL titanium dioxide nanotube dispersion;

[0031] Step 2:

[0032] Measure 2ml each of graphene oxide quantum dot dispersion liquid and titanium dioxide nanotube dispersion liquid respectively, add them into the cavity of the air-spray equipment, and deposit graphene oxide quantum dots and titanium dioxide nanotubes on the hydrophilic treated surface by means of simultaneous air spraying. The surface of the interdigitated electrode is then placed in a vacuum drying oven at a temperature of 60 ° C for 2 hours to obtain a film of composite nanostructure formed by graphene oxide quantum dots and titanium dioxide nanotubes;

[0033] Step 3:

[0034] Put the interdigitated el...

Embodiment 3

[0038] step 1:

[0039] Weigh 15mg of graphene quantum dots and dissolve them in 9.8ml of deionized water to prepare 10mL of graphene oxide quantum dot dispersion with a concentration of 1.5mg / mL; weigh 5.0mg of titanium dioxide nanotubes and dissolve them in 9.8ml of ethanol to prepare 10mL Concentration is the titanium dioxide nanotube dispersion liquid of 0.5mg / mL;

[0040] Step 2:

[0041] Measure 2ml each of graphene oxide quantum dot dispersion liquid and titanium dioxide nanotube dispersion liquid respectively, add them into the cavity of the air-spray equipment, and deposit graphene oxide quantum dots and titanium dioxide nanotubes on the hydrophilic treated surface by means of simultaneous air spraying. The surface of the interdigitated electrode is then placed in a vacuum drying oven at a temperature of 60 ° C for 2 hours to obtain a film of composite nanostructure formed by graphene oxide quantum dots and titanium dioxide nanotubes;

[0042] Step 3:

[0043] Put ...

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Abstract

The invention discloses a preparation method of a gas-sensitive material with a nanocomposite structure, belonging to the technical field of sensitive materials. The preparation method of this method is different from the existing mixed solution system to prepare gas-sensitive materials. Firstly, titanium dioxide nanotubes and graphene oxide quantum dots are formed on the substrate to form a composite nanostructure film through step-by-step preparation, and then graphite oxide is reduced by laser irradiation. Graphene quantum dots are formed into agglomerated films. While avoiding the defect that graphene quantum dots and titanium dioxide nanotubes are difficult to mix, based on the physical expansion effect, RGO and titanium dioxide nanotubes are effectively combined to form a material with multi-dimensional characteristics, thereby significantly increasing The surface area and openness of the composite nanostructure are conducive to the adsorption and desorption of gas molecules, and significantly improve the sensitivity of gas-sensitive materials; finally, the ultra-thin nano-metal oxide layer is deposited, which not only ensures the stability of the composite nanostructure, but also improves the Material selectivity for gases.

Description

technical field [0001] The invention belongs to the technical field of sensitive materials, and in particular relates to a preparation method of a gas-sensitive material with a nanocomposite structure. Background technique [0002] Gas-sensing materials involve the interaction between the surface of the sensitive material and gas molecules, or cause changes in the electrical properties of the sensitive material to generate a gas-sensing signal. The generation of gas-sensing signals involves the adsorption of gas on the surface of the gas-sensing material and the charge transfer between gas molecules and the gas-sensing material. The key point in the above process is to improve the effect of interaction between sensitive materials and gas molecules. Therefore, how to develop a new gas-sensing material to solve the above problems has become the focus of research in this field. [0003] Because the nanostructure material system has the advantages of large specific surface are...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/00G01N27/12B82Y30/00
CPCB82Y30/00G01N27/00G01N27/127
Inventor 杨亚杰周凯汪鑫何鑫毛喜玲周榆久赵月涛徐建华
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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