Air-sensitive material compounded by titanium dioxide nanometer lines and stannic oxide nanometer particles and preparation method thereof

A titanium dioxide and nanoparticle technology, which is applied in the field of nanometer gas-sensing materials and their preparation, can solve the problems that the working temperature and sensitivity of semiconductor gas-sensing sensors cannot be solved, and the synergistic effect of nanostructured composite materials cannot be used.

Inactive Publication Date: 2012-07-04
ZHENGZHOU UNIV
View PDF1 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the materials involved in this invention only simply mix two kinds of tin dioxide nanomaterials with different structures through traditional grinding, dry mixing or airflow stirring, etc., and ...

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Sodium titanate nanowires are prepared by hydrothermal reaction at 220℃ for 120 hours; the mass ratio of tin dioxide precursor (calculated as tin dioxide) to sodium titanate is 1:10 when synthesizing tin dioxide nanoparticles in situ, hydrothermal The reaction temperature is 240℃; after solid-liquid separation, washing and drying of the product, a small amount of polyethylene glycol is added as a dispersant to make a paste with anhydrous ethanol, and it is evenly coated on an alumina ceramic tube with a gold electrode at room temperature After drying, heat treatment at 600°C for 3 hours. Place a resistance heating wire in the inner cavity of the alumina ceramic tube, and weld it to the tube base to make an indirect gas sensor. The gas sensor is measured on the HW-30A gas sensor test system by static gas distribution method performance. The element has a sensitivity of 19 at a working temperature of 250°C and a 500ppm ethanol atmosphere.

Embodiment 2

[0018] Sodium titanate nanowires are prepared by hydrothermal reaction at 220℃ for 120 hours; the mass ratio of tin dioxide precursor (calculated as tin dioxide) to sodium titanate is 1:5 when synthesizing tin dioxide nanoparticles in situ, hydrothermal The reaction temperature is 240℃; after solid-liquid separation, washing and drying of the product, a small amount of polyethylene glycol is added as a dispersant to make a paste with anhydrous ethanol, and it is evenly coated on an alumina ceramic tube with a gold electrode at room temperature After drying, heat treatment at 700°C for 3 hours. Place a resistance heating wire in the inner cavity of the alumina ceramic tube, and weld it to the tube base to make an indirect gas sensor. The gas sensor is measured on the HW-30A gas sensor test system by static gas distribution method performance. The element has a sensitivity of 24 at a working temperature of 250°C and a 500ppm ethanol atmosphere.

Embodiment 3

[0020] Sodium titanate nanowires are prepared by hydrothermal reaction at 180℃ for 120 hours; the mass ratio of tin dioxide precursor (calculated as tin dioxide) to sodium titanate is 1:10 when synthesizing tin dioxide nanoparticles in situ, hydrothermal The reaction temperature is 240℃; after solid-liquid separation, washing and drying of the product, a small amount of polyethylene glycol is added as a dispersant to make a paste with anhydrous ethanol, and it is evenly coated on an alumina ceramic tube with a gold electrode at room temperature After drying, heat treatment at 700°C for 3 hours. Place a resistance heating wire in the inner cavity of the alumina ceramic tube, and weld it to the tube base to make an indirect gas sensor. The gas sensor is measured on the HW-30A gas sensor test system by static gas distribution method performance. The element has a sensitivity of 17 at a working temperature of 250°C and a 500ppm ethanol atmosphere.

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 discloses an air-sensitive material compounded by titanium dioxide nanometer lines and stannic oxide nanometer particles and a preparation method thereof. A material core layer is made of the titanium dioxide nanometer lines with good crystallinity, and a layer of stannic oxide nanometer particles with high specific surface area characteristics is formed on the surface of the core layer through in-situ reaction. Firstly, a hydrothermal method is used for synthetizing sodium titanate nanometer lines, the stannic oxide nanometer particles are synthetized on the nanometer lines in in-situ mode, and reaction products are liquid-solid separated, washed and dried and thermally processed for 1 hour to 3 hours at the temperature of 500 DEG C to 700 DEG C. The air-sensitive material is stable in performance, simple in manufacture process and high in flexibility at the low working temperature of 250 DEG C.

Description

Technical field [0001] The invention relates to the technical field of real-time detection of the target gas concentration in the environment by means of measuring the chemical or physical properties of materials, in particular to a nano gas-sensitive material composed of titanium dioxide and tin dioxide graded composite and a preparation method thereof. Background technique [0002] The semiconductor gas sensing technology developed on the basis of semiconductor gas sensors and sensors is an important development direction of sensing technology. Its principle is to use the oxidation and reduction reactions of gases on the semiconductor surface to change the resistance of the sensor to convert the gas concentration into electricity. Signal output, effectively monitoring the gas concentration in the environment. Compared with other types of sensors, the semiconductor gas sensor has the advantages of high detection sensitivity, short response recovery time, simple circuit, convenie...

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
Inventor 董林王宇董孚颖裴腾飞李泽汉李虹庆俞天海贾晓林关绍康
Owner ZHENGZHOU UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap