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Paper-based ethanol gas sensor

A gas sensor, ethanol technology, applied in the direction of instruments, scientific instruments, measuring devices, etc., can solve the problems of excessive energy consumption, high working temperature, weak stability, etc., to achieve the promotion of adsorption performance, high sensitivity, short response/recovery time Effect

Inactive Publication Date: 2021-03-16
GUANGDONG PROV MEDICAL INSTR INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional zinc oxide gas sensors still have disadvantages such as high working temperature (240-500°C), excessive energy consumption, slow response, and weak stability.
Unable to achieve good gas-sensing performance at room temperature, which restricts its application as a wearable gas sensor and the field of biosensing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The preparation method of the paper-based ethanol gas sensor of this example comprises the following steps:

[0053] (1) Take a certain amount of zinc acetate and sodium hydroxide with a mass ratio of 1:4 and dissolve them in an equal amount of absolute ethanol, and ultrasonicate for 15 minutes to completely dissolve, then add the prepared sodium hydroxide solution dropwise to the zinc acetate solution , magnetically stirred for 30 minutes. Finally, the mixed solution was transferred to a reaction kettle to react at 180°C for 12 hours. After the reaction was completed, it was cooled to room temperature, washed by centrifugation, and dried at 60° C. for 24 hours to obtain white ZnO powder (zinc oxide nanorods).

[0054] (2) Ultrasonic the freeze-dried graphene oxide completely, and disperse it in distilled water at a mass ratio of 1:10 to obtain a graphene oxide dispersion solution. Then take 0.01g of ZnO powder prepared in step (1) and add 1mL of deionized water. Afte...

Embodiment 2

[0057] The preparation method of the paper-based ethanol gas sensor of this example comprises the following steps:

[0058] (1) Take a certain amount of zinc acetate and sodium hydroxide with a mass ratio of 1:4 and dissolve them in an equal amount of absolute ethanol, and ultrasonicate for 15 minutes to completely dissolve, then add the prepared sodium hydroxide solution dropwise to the zinc acetate solution , magnetically stirred for 30 minutes. Finally, the mixed solution was transferred to a reaction kettle to react at 180° C. for 16 hours. After the reaction was completed, it was cooled to room temperature, washed by centrifugation, and dried at 60° C. for 24 hours to obtain white ZnO powder (zinc oxide nanorods).

[0059] (2) Ultrasonic the freeze-dried graphene oxide completely, and disperse it in distilled water at a mass ratio of 1:10 to obtain a graphene oxide dispersion solution. Then take 0.01g of ZnO powder prepared in step (1) and add 1mL of deionized water. Af...

Embodiment 3

[0062] The preparation method of the paper-based ethanol gas sensor of this example comprises the following steps:

[0063] (1) Take a certain amount of zinc acetate and sodium hydroxide with a mass ratio of 1:4 and dissolve them in an equal amount of absolute ethanol, and ultrasonicate for 15 minutes to completely dissolve, then add the prepared sodium hydroxide solution dropwise to the zinc acetate solution , magnetically stirred for 30 minutes. Finally, the mixed solution was transferred to a reaction kettle to react at 180°C for 22 hours. After the reaction was completed, it was cooled to room temperature, washed by centrifugation, and dried at 60° C. for 24 hours to obtain white ZnO powder (zinc oxide nanorods).

[0064] (2) Ultrasonic the freeze-dried graphene oxide completely, and disperse it in distilled water at a mass ratio of 1:10 to obtain a graphene oxide dispersion solution. Then take 0.01g of ZnO powder prepared in step (1) and add 1mL of deionized water. Afte...

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Abstract

The invention provides a paper-based ethanol gas sensor. The paper-based ethanol gas sensor comprises a transparent paper base layer, a conductive layer and a gas sensitive layer, wherein the conductive layer is arranged on one surface of the transparent paper base layer; the gas sensitive layer is arranged on the surface, far away from the transparent paper base layer, of the conductive layer; and the gas-sensitive sensing layer is a nano zinc oxide and graphene composite layer. The paper-based ethanol gas sensor is prepared on the basis of the two-dimensional flexible nano zinc oxide and graphene composite material through a silk-screen printing method, and the preparation process is simple. The ethanol gas sensor provided by the invention is high in sensitivity and short in response / recovery time, realizes device formation of a gas sensitive sensor, and has a market development prospect.

Description

technical field [0001] The invention belongs to the technical field of electronic gas sensors, in particular to a paper-based ethanol gas sensor. Background technique [0002] In the fields of chemical production, traffic safety, food industry and medical diagnosis, the demand for highly sensitive, fast, low-cost, portable and intelligent gas sensors is increasing day by day. The humidity of human exhaled gas is a physiological detection object in medical diagnosis, and gas sensors can be used to monitor it in real time. However, its application scenarios are more complex than those in industrial environments, and gas sensors used in the biomedical field have strict safety performance requirements. Higher, which puts forward higher requirements for flexibility, wearability and biocompatibility of the device. [0003] According to the gas sensitive material of the sensor and the mechanism and effect of gas interaction, it can be divided into electrochemical gas sensor, metal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12
CPCG01N27/127
Inventor 刘海信龚尧邹丽丽陈龙胜
Owner GUANGDONG PROV MEDICAL INSTR INST
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