Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Nano material, synthesis method thereof, gas sensor and preparation method and application of gas sensor

A gas sensor and nanomaterial technology, applied in the field of sensors, can solve the problems of poor selectivity and repeatability, and achieve the effects of low manufacturing cost, good gas sensitivity characteristics, good selectivity and stability

Pending Publication Date: 2020-09-08
苏州新傲信息技术有限公司
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, at present, most of the traditional gas sensors are based on SnO 2 Nanomaterials are used as key gas-sensing materials for sensors, although SnO 2 Nanomaterials have a certain response to volatile organic compounds (such as ethanol gas, etc.), but based on SnO 2 Gas sensors based on nanomaterials have disadvantages such as poor selectivity and repeatability.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Nano material, synthesis method thereof, gas sensor and preparation method and application of gas sensor
  • Nano material, synthesis method thereof, gas sensor and preparation method and application of gas sensor
  • Nano material, synthesis method thereof, gas sensor and preparation method and application of gas sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] This embodiment provides a kind of synthetic method of nanometer material, it comprises the following steps:

[0035] S1. Dissolve 0.5mmol of ferric nitrate nonahydrate, 0.4g of polyvinylpyrrolidone and 0.554g of sodium acetate (4mmol) in 30mL of a mixed solvent, and then place it in a reaction kettle at 180°C for 24 hours of hydrothermal reaction. get reactants. Wherein, the mixed solvent is formed by mixing methanol and deionized water according to a volume ratio of 1:2.

[0036] S2. Suction filtration and separation of the above-mentioned reactant to obtain a solid.

[0037] S3. Wash the above-mentioned solid matter with absolute ethanol and deionized water three times in sequence, and dry it at 80°C for 6 hours, and then place it in a muffle furnace at 450°C for calcination for 3 hours to obtain a rhombohedral structure Fe 2 o 3 nanomaterials. Wherein, the heating rate of the muffle furnace is 5° C. / min.

Embodiment 2

[0039] This embodiment provides a kind of synthetic method of nanometer material, it comprises the following steps:

[0040] S1. Dissolve 0.5mmol of ferric nitrate nonahydrate, 0.2g of polyvinylpyrrolidone and 0.554g of sodium acetate (4mmol) in 30mL of mixed solvent, and then place it in a reaction kettle at 180°C for 30h of hydrothermal reaction. get reactants. Wherein, the mixed solvent is formed by mixing methanol and deionized water according to a volume ratio of 1:2.

[0041] S2. Suction filtration and separation of the above-mentioned reactant to obtain a solid.

[0042] S3. Wash the above-mentioned solid matter with absolute ethanol and deionized water three times in sequence, and dry it at 80°C for 6 hours, and then place it in a muffle furnace at 450°C for calcination for 3 hours to obtain a rhombohedral structure Fe 2 o 3 nanomaterials. Wherein, the heating rate of the muffle furnace is 5° C. / min.

Embodiment 3

[0044] This embodiment provides a kind of synthetic method of nanometer material, it comprises the following steps:

[0045] S1. Dissolve 0.5mmol of ferric nitrate nonahydrate, 0.4g of polyvinylpyrrolidone and 0.554g of sodium acetate (4mmol) in 30mL of mixed solvent, and then place it in a reaction kettle at 180°C for 30h of hydrothermal reaction. get reactants. Wherein, the mixed solvent is formed by mixing methanol and deionized water according to a volume ratio of 1:2.

[0046] S2. Suction filtration and separation of the above-mentioned reactant to obtain a solid.

[0047] S3. Wash the above-mentioned solid matter with absolute ethanol and deionized water three times in sequence, and dry it at 80°C for 6 hours, and then place it in a muffle furnace at 500°C for calcination for 3 hours to obtain a rhombohedral structure Fe 2 o 3 nanomaterials. Wherein, the heating rate of the muffle furnace is 5° C. / min.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention is applicable to the technical field of sensors and provides a nano material, a synthesis method thereof, a gas sensor, a preparation method and applications of the gas sensor. The synthesis method of the nano material comprises the following steps: dissolving ferric nitrate, polyvinylpyrrolidone and sodium acetate in a mixed solvent, and carrying out a hydrothermal reaction at a temperature of 160-220 DEG C to obtain a reactant; carrying out suction filtration separation on the reactant to obtain a solid; and washing and drying the solid, and calcining the solid at the temperature of 450-500 DEG C to obtain a nano material with the rhombohedral structure. A gas sensor for detecting the concentration of ethanol gas can be prepared by depositing the nano material between sensing electrodes of a sensor chip. The gas sensor based on the nano material has the advantages of lower power consumption, ultrafast response / recovery characteristic to low-concentration ethanol gas, good selectivity and stability to the ethanol gas and the like.

Description

technical field [0001] The invention belongs to the technical field of sensors, and in particular relates to a nanometer material, its synthesis method, a gas sensor, its preparation method and application. Background technique [0002] In recent years, the SO produced by industrial exhaust emissions and automobile exhaust emissions 2 , NH 3 , NO x , CO, and VOC (volatile organic compounds) such as ethanol gas volatilized from interior decoration materials have become increasingly serious air pollution problems. In order to accurately detect polluting gases in the air, reliable and durable gas equipment is essential. Among the numerous micro-electromechanical system (Micro-Electro-Mechanical System, MEMS) gas sensors, metal oxide semiconductor material sensors have the advantages of low price, high sensitivity and good selectivity. [0003] Iron oxide materials have good catalytic and gas sensing properties. Fe in common iron oxide materials 2 o 3 It is a stable n-typ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12
CPCG01N27/127
Inventor 潘文辉
Owner 苏州新傲信息技术有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com