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

Room temperature NO2 sensor based on rGO-Co3O4 compound and preparation method of room temperature NO2 sensor

A technology of rgo-co3o4 and compound, applied in the direction of instruments, scientific instruments, measuring devices, etc., can solve the problems of limited practical application, energy waste, etc., and achieve the effect of being suitable for mass production, low cost, and good conductivity

Inactive Publication Date: 2018-05-08
JILIN UNIV
View PDF4 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with Co 3 o 4 Gas sensors that are sensitive materials usually show only CO, NH 3 , ethanol, acetone and other reducing gases, as of now, very few reports involve Co 3 o 4 Detection of oxidizing gases such as NO 2 and O 3 Wait
In addition, based on Co 3 o 4 Gas sensors usually require a high (>200°C) operating temperature, which also causes a lot of energy waste and limits its practical application.

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
  • Room temperature NO2 sensor based on rGO-Co3O4 compound and preparation method of room temperature NO2 sensor
  • Room temperature NO2 sensor based on rGO-Co3O4 compound and preparation method of room temperature NO2 sensor
  • Room temperature NO2 sensor based on rGO-Co3O4 compound and preparation method of room temperature NO2 sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] rGO-Co 3 o 4 Composite as sensitive material for room temperature NO 2 Sensor, its specific production process:

[0040] 1. Dissolve 0.873g of cobalt nitrate hexahydrate and 0.54g of urea into 30mL of deionized water under constant stirring, and continue to stir for 45 minutes to obtain a uniform solution; then, the above solution is hydrothermally reacted at 160°C for 16 hours, and cooled to room temperature The precipitate was obtained by high-speed centrifugation, washed several times with deionized water and absolute ethanol, freeze-dried at -40 °C for 16 hours, and then calcined at 600 °C for 2 hours to obtain black Co 3 o 4 powder;

[0041] 2. Take 15 mg of freeze-dried graphene oxide powder, add it to 15 mL of deionized water, and ultrasonicate for 45 minutes to obtain a uniform and transparent graphene oxide solution; 3 o 4 Add the powder to 20mL deionized water, then add 500μL graphene oxide solution, and stir for 12 hours; then add 200μL hydrazine monohy...

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

PropertyMeasurementUnit
Outer diameteraaaaaaaaaa
The inside diameter ofaaaaaaaaaa
Widthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a room temperature NO2 sensor based on an rGO-Co3O4 compound and a preparation method of the room temperature NO2 sensor and belongs to the technical field of semiconductor metallic oxide gas sensors. The room temperature NO2 sensor consists of an Al2O3 insulating ceramic tube sold in the market, a semiconductor sensitive material and a nickel-chromium alloy heating coil, wherein the Al2O3 insulating ceramic tube is provided with two annular golden electrodes; the semiconductor sensitive material is applied to the annular golden electrodes and the Al2O3 insulating ceramic tube; the nickel-chromium alloy heating coil penetrates through the Al2O3 insulating ceramic tube. Due to adoption of the rGO-Co3O4 compound sensitive material prepared by using a combined hydrothermal and water bath method, and by virtue of a high specific surface area, a large gas adsorption capacity, a rapid charge carrier migration velocity and good conductivity of graphene, and the synergism of the graphene with Co3O4, surface chemical reactions of a detected gas are enhanced, charge migration between rGO and Co3O4 is caused, the sensitivity property of the sensor upon NO2 is effectively improved, and in addition the working temperature of a device can be reduced to a room temperature. The room temperature NO2 sensor is simple in process, small in size, applicable to large-scale production and thus wide in application prospect in detecting the content of NO2 in microenvironments.

Description

technical field [0001] The invention belongs to the technical field of semiconductor metal oxide gas sensors, in particular to a sensor based on rGO-Co 3 o 4 room temperature NO of the complex 2 Sensors and methods of making them. Background technique [0002] Air pollution concept. Normally, the composition of trace gases in the atmosphere is insignificant. However, in a certain range of atmosphere, the appearance of trace substances that do not exist in the first place is likely to have adverse effects and harms on people, animals, plants, objects, materials, etc. When the concentration of pollutants in the atmosphere reaches a harmful level, it can even destroy the ecological system and the conditions for the normal survival and development of human beings, and the phenomenon that causes harm to people or things is called air pollution. There are both natural factors and man-made factors that cause air pollution. Natural factors include smoke, sulfur oxides, nitrogen...

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
IPC IPC(8): G01N27/12
CPCG01N27/125
Inventor 卢革宇张博高原刘方猛孙鹏梁喜双马健
Owner JILIN 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