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Transparent gas sensor based on copper oxide/zinc oxide heterostructure, and preparation method thereof

A gas sensor and heterostructure technology, applied in the direction of material resistance, etc., can solve the problems of gas sensor sensitivity and detection limit being difficult to meet actual use requirements, and achieve the effect of improving efficiency and sensitivity, increasing porosity and specific surface area

Active Publication Date: 2018-07-10
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the sensitivity and detection limit of gas sensors made of pure zinc oxide materials are difficult to meet the needs of actual use, so people hope to improve the gas sensing performance of zinc oxide by doping other materials

Method used

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  • Transparent gas sensor based on copper oxide/zinc oxide heterostructure, and preparation method thereof
  • Transparent gas sensor based on copper oxide/zinc oxide heterostructure, and preparation method thereof
  • Transparent gas sensor based on copper oxide/zinc oxide heterostructure, and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0021] A transparent gas sensor based on a copper oxide / zinc oxide heterostructure, the sensor includes an ITO glass substrate 1, a copper oxide / zinc oxide heterostructure layer and a top electrode layer 4 deposited on the substrate, the oxide The copper / zinc oxide heterostructure layer includes branched copper oxide 2 and zinc oxide nanostructure layer 3 .

[0022] (1) Weigh 0.5 g of copper nanowires and disperse them into 800 mL of deionized water, and heat them in a water bath at 60° C.; the diameter of the copper nanowires is about 100 nm, and the length is about 20 μm;

[0023] (2) Take 3L of oxygen with a balloon, and continuously feed oxygen into the copper nanowire system by connecting the syringe;

[0024] (3) After oxidizing for 1 hour, the product was suction-filtered and vacuum-dried to finally obtain a copper oxide nanowire branch structure, which was sprayed onto a glass sheet for use;

[0025] (4) Weigh zinc acetate dihydrate, methyl alcohol, polyvinyl alcohol ...

Embodiment 2

[0030] A transparent gas sensor based on a copper oxide / zinc oxide heterostructure, the sensor includes an ITO glass substrate 1, a copper oxide / zinc oxide heterostructure layer and a top electrode layer 4 deposited on the substrate, the oxide The copper / zinc oxide heterostructure layer includes branched copper oxide 2 and zinc oxide nanostructure layer 3 .

[0031] (1) Weigh 0.5g of copper nanowires and disperse them in 800mL of ethanol, and heat in a water bath at 60°C; the diameter of the copper nanowires is about 100nm, and the length is about 20μm;

[0032] (2) Take 3L of oxygen with a balloon, and continuously feed oxygen into the copper nanowire system by connecting the syringe;

[0033] (3) After oxidizing for 1 hour, the product was suction-filtered and vacuum-dried to finally obtain a copper oxide nanowire branch structure, which was sprayed onto a glass sheet for use;

[0034] (4) Weigh zinc acetate dihydrate, methyl alcohol, polyvinyl alcohol and dissolve in ethan...

Embodiment 3

[0039] A transparent gas sensor based on a copper oxide / zinc oxide heterostructure, the sensor includes an ITO glass substrate 1, a copper oxide / zinc oxide heterostructure layer and a top electrode layer 4 deposited on the substrate, the oxide The copper / zinc oxide heterostructure layer includes branched copper oxide 2 and zinc oxide nanostructure layer 3 .

[0040] (1) Weigh 0.5 g of copper nanowires and disperse them into an equal-volume mixed system of 800 mL of ethanol and water, and heat in a water bath at 60 ° C; the diameter of the copper nanowires is about 100 nm, and the length is about 20 μm;

[0041] (2) Take 3L of oxygen with a balloon, and continuously feed oxygen into the copper nanowire system by connecting the syringe;

[0042] (3) After oxidizing for 1 hour, the product was suction-filtered and vacuum-dried to finally obtain a copper oxide nanowire branch structure, which was sprayed onto a glass sheet for use;

[0043] (4) Weigh zinc acetate dihydrate, methy...

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Abstract

The invention discloses a transparent gas sensor based on a copper oxide / zinc oxide heterostructure, and a preparation method thereof, wherein the sensor comprises an ITO glass substrate, a copper oxide / zinc oxide heterostructure layer deposited on the substrate, and a top electrode layer. According to the present invention, the transparent gas sensor can utilize the synergistic action of copper oxide and zinc oxide so as to increase the porosity and the specific surface area of the nanometer material, and can further provide the electronic junction performance at the interface position of theheterostructure; and copper oxide can react with a reducing gas such as hydrogen sulfide to generate an intermediate acted as the electronic gate of the sensor so as to substantially improve the efficiency and the sensitivity of the sensor.

Description

technical field [0001] The invention belongs to the field of nanomaterial preparation and application sensing, and relates to a sensor, in particular to a transparent gas sensor based on a copper oxide / zinc oxide heterostructure and a preparation method thereof. Background technique [0002] The one-dimensional semiconductor material ZnO has high chemical stability, and has a large conduction band width and electron excitation binding energy at room temperature. In recent years, zinc oxide nanomaterials have become a research hotspot in the fields of catalysis and optoelectronics, and have broad application prospects in solar cells, nano-lasers, ultraviolet light detectors and gas sensors. As the most commonly used gas sensor material, numerous types of gas sensing devices have been developed using ZnO nanomaterials. However, the sensitivity and detection limit of gas sensors made of pure zinc oxide materials are difficult to meet the needs of actual use, so people hope to ...

Claims

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Application Information

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IPC IPC(8): G01N27/12
CPCG01N27/12
Inventor 张广维吴雪卫陈剑宇孙志鹏李谊马延文张新稳黄艳琴钱妍
Owner NANJING UNIV OF POSTS & TELECOMM
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