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

A kind of preparation method of high-sensitivity ethanol gas sensor

A gas sensor and high-sensitivity technology, applied in the field of gas sensor preparation, can solve problems such as burden and energy consumption, and achieve the effects of short response time, low working temperature and simple preparation process

Active Publication Date: 2020-04-28
NANJING TECH UNIV +1
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The working temperature is also an important factor affecting the response of the sensor. High working temperature needs to consume more energy, thus causing a greater burden on the environment. Therefore, a sensor with low working temperature and good selectivity to ethanol is very important. promising

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
  • A kind of preparation method of high-sensitivity ethanol gas sensor
  • A kind of preparation method of high-sensitivity ethanol gas sensor
  • A kind of preparation method of high-sensitivity ethanol gas sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1 Preparation of Sn 3 o 4 square material

[0020] Dissolve 0.276g of salicylic acid in 20ml of high-purity water and ethanol mixed solvent (V water: V ethanol = 1:1), stir until completely dissolved, then add 7ml of NaOH solution (1mol / L) to the solution. 0.339g SnCl 2 ▪H 2 O was dissolved in 10ml of high-purity water and stirred until dissolved. Configured SnCl 2 The solution was added dropwise to the solution prepared with salicylic acid under the condition of stirring. After stirring for 30 minutes, put it into a 50ml polytetrafluoroethylene hydrothermal reaction kettle, put the reaction kettle at 150°C for 16 hours and cool to obtain a light yellow precipitate , the obtained light yellow precipitate was centrifuged and washed 6 times with high-purity water and absolute ethanol under the condition of 8000rmp to obtain a light yellow sample, and the obtained light yellow sample was dried at 60°C for 4h to prepare layered Sn 3 o 4 Square material.

Embodiment 2

[0022] A preparation method of a high-sensitivity ethanol gas sensor, comprising the following steps: Step 1, taking 30mgSn 3 o 4 Mix the square sheet material with 10ml of ethylene glycol, stir evenly, add 10mg of polyvinylpyrrolidone, continue to stir, then drop in 0.077mmol of tetrachloroplatinic acid solution, and stir to obtain the first mixture; step 2, transfer the first mixture In the ark, after drying at 200°C for 2 hours together with the ark, transfer the samples in the ark to a tube furnace for sintering at 500°C, and sinter for 4 hours to obtain a semi-finished product; step 3, after mixing the semi-finished product with deionized water, Then spread evenly on the alumina / Au electrode, after drying, put it in a tube furnace and sinter to 500°C, and sinter for 4 hours to get the electrode; step 4, weld the electrode on the electrode base to complete the gas sensor preparation. Wherein, the sintering temperature of the tube furnace in step 2 and step 3 is both 500°...

Embodiment 3

[0024] A kind of preparation method of high-sensitivity ethanol gas sensor, comprises the following steps: Step 1, take 45mgSn 3 o 4 Mix the square sheet material with 20ml of glycerin, stir well, add 10mg of polyvinylpyrrolidone, continue to stir, then drop in 0.005mmol of chloroplatinic acid solution, and stir to obtain the first mixture; step 2, transfer the first mixture to the ark, After drying in an oven at 300°C for 2 hours, transfer the sample in the ark to a tube furnace for sintering to 500°C, and sinter for 4 hours to obtain a semi-finished product; step 3, mix the semi-finished product with an appropriate amount of deionized water, and coat it evenly On the alumina / Au electrode, after drying, place it in a tube furnace and sinter to 500°C for 2 hours to obtain an electrode; step 4, weld the electrode on the electrode base to complete the preparation of the gas sensor. Wherein, the sintering temperature of the tube furnace in step 2 and step 3 is both 500° C., and ...

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 relates to a preparation method of a high-sensitivity ethanol gas sensitive sensor. The method comprises the following steps: mixing 10 to 50 mg of Sn3O4 square sheet type materials and 5 to 50 ml of glycol, stirring uniformly, adding 5 to 30 mg of polyvinylpyrrolidone, continuously stirring, adding 0.005 to 0.1 mmol of chloroplatinic acid solution dropwise, and stirring to obtain a first mixture; transferring the first mixture into an ark, performing drying treatment on the ark, transferring a sample in the ark to a tubular furnace and sintering at high temperature to obtain a semi-finished product; mixing the semi-finished product and deionized water, coating an aluminum trioxide / Au electrode with the mixture uniformly, airing, and putting into the tubular furnace to sinter to obtain an electrode; welding the electrode on an electrode pedestal and finishing preparation of the gas sensitive sensor. The preparation process of the gas sensitive sensor is simple, the response time is short, the working temperature is low, and the sensor which is prepared by loading platinum on a layered Sn3O4 / SnO2 heterojunction square piece type gas sensitive material can realize room-temperature detection.

Description

technical field [0001] The invention belongs to the technical field of gas sensor preparation, and in particular relates to a preparation method of a high-sensitivity ethanol gas sensor. Background technique [0002] The semiconductor sensor is one of the earliest sensors invented. It can be used to detect the alcohol content in the gas, and can be used for the detection of drunk driving. The sensor detection element is generally divided into a heating layer, an electrode and a gas-sensitive material layer. In general, in order to avoid the interference of other gases and make the detection more accurate, some elements such as nickel, manganese, and lanthanum are generally doped in the gas-sensitive material to eliminate the interference of other gases and improve the sensitivity and selectivity to ethanol. The working temperature is also an important factor affecting the response of the sensor. High working temperature needs to consume more energy, thus causing a greater bu...

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 Patents(China)
IPC IPC(8): G01N27/00
CPCG01N27/00
Inventor 章伟马先俊胡雪峰杜薇胡烨伟闵信杰
Owner NANJING TECH UNIV
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