Nano bicrystal-phase indium oxide gas-sensitive material as well as preparation method and application thereof

A nano-twin and indium oxide technology, applied in chemical instruments and methods, analytical materials, material resistance, etc., can solve problems that are not conducive to shape and crystal form regulation, unfavorable industrial production, complicated preparation process, etc., and achieve industrial prospects Good, cheap preparation raw materials, simple operation process

Active Publication Date: 2021-01-29
YANCHENG INST OF TECH
View PDF3 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this patent uses ethanol as a solvent, and its preparation process is complicated. After a two-step hydrothermal process, a single crystal phase of In 2 o 3 Further compounding high-sensitivity SnO 2 materials to finally obtain composite materials with gas-sensing properties
However, ethanol is not environmentally friendly as an organic solvent, and it is dangerous at high temperatures and relatively high in cost, which is not conducive to industrial production
Moreover, the raw materials used are more likely to be melted in water rather than ethanol to undergo hydrolysis reactions to produce intermediates, which is not conducive to the final preparation of product morphology and crystal form control

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 bicrystal-phase indium oxide gas-sensitive material as well as preparation method and application thereof
  • Nano bicrystal-phase indium oxide gas-sensitive material as well as preparation method and application thereof
  • Nano bicrystal-phase indium oxide gas-sensitive material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Weigh 2mM trisodium citrate into the beaker, then add 30 ml of deionized water; stir the above solution with a glass rod until it is completely dissolved, then add 1.0 mmol In(NO 3 ) 3 4.5H 2 O and 3.0 mmol urea; magnetically stir the above prepared solution for 30 min until completely dissolved; put the above stirred solution into a high-pressure reactor and heat it for 8 hours; after the reaction, cool and centrifuge, wash with deionized water three times It was washed twice with absolute ethanol, dried and calcined at 450° C. for 3 h in a muffle furnace before being collected and utilized.

[0034] Pour an appropriate amount of the annealed sample into an agate mortar, add an appropriate amount of terpineol to the sample and grind it gently and fully to make it into a uniform paste. Put a toothpick in the middle of the ceramic tube for fixation, then use tweezers to straighten the platinum wire on the ceramic tube, and use a pre-sharpened bamboo stick to evenly sme...

Embodiment 2

[0036] Weigh 0.5mM trisodium citrate into the beaker, then add 30 ml of deionized water; stir the above solution with a glass rod until it is completely dissolved, then add 2.0 mmol InCl 3 4H 2 O and 2.0 mmol urea; magnetically stir the above prepared solution for 30 min until it is completely dissolved; put the above stirred solution into a high-pressure reactor at 150°C for hydrothermal reaction for 10 h; after the reaction, cool and centrifuge, and deionize After washing with water three times and then with absolute ethanol twice, after drying, it was calcined at 400°C for 5 hours in a muffle furnace and collected for use.

[0037]Pour an appropriate amount of the annealed sample into an agate mortar, add an appropriate amount of terpineol to the sample and grind it gently and fully to make it into a thick and suitable paste. Put a toothpick in the middle of the ceramic tube for fixation, then use tweezers to straighten the platinum wire on the ceramic tube, and use a pre-...

Embodiment 3

[0039] Weigh 5mM trisodium citrate into the beaker, then add 30 ml of deionized water; stir the above solution with a glass rod until it is completely dissolved, then add 5.0 mmol In(NO 3 ) 3 4.5H 2 O and 1.0 mmol urea; magnetically stir the above prepared solution for 30 min until it is completely dissolved; put the above stirred solution into a high-pressure reactor at 150°C for hydrothermal reaction for 15 h; after the reaction, cool and centrifuge, and deionize After washing with water three times and then with absolute ethanol twice, after drying, it was calcined in a muffle furnace at 500°C for 1 hour, and then collected and utilized.

[0040] Pour an appropriate amount of the annealed sample into an agate mortar, add an appropriate amount of terpineol to the sample and grind it gently and fully to make it into a thick and suitable paste. Put a toothpick in the middle of the ceramic tube for fixation, then use tweezers to straighten the platinum wire on the ceramic tub...

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
diameteraaaaaaaaaa
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to view more

Abstract

The invention discloses a nano bicrystal-phase indium oxide gas-sensitive material as well as a preparation method and application thereof. An indium oxide nano material with a bicrystal-phase structure is prepared by taking soluble indium salt as a raw material, taking water as a solvent, taking trisodium citrate as a crystal form regulator and a surfactant and taking urea as a precipitator and apH value regulator through one-step hydrothermal method. According to the sensitive characteristics of the gas-sensitive material, the nano indium oxide with a heterogeneous junction formed by a unique bicrystal phase structure is designed and prepared, and the material is prepared into a sensor material and has high response to ethanol, dimethylamine and methanol gas. The method has the advantages of cheap preparation raw materials, environment-friendly synthetic route with water as a solvent, simple operation process, high yield, excellent gas sensitivity of the material, and convenience for industrial production.

Description

technical field [0001] The invention relates to the technical field of gas-sensing materials, in particular to a nano-twin phase indium oxide gas-sensing material and its preparation method and application. Background technique [0002] With the continuous emergence of environmental problems, people urgently need to use scientific methods to detect them and develop better solutions to solve air pollution. So far, there are many methods to detect and monitor these toxic and harmful gases, but due to its many shortcomings, it is difficult to be popularized. However, semiconductor gas sensors are simple, light and simple, and have relatively low production and use costs. Low, so it has been widely used in daily life. The continuous development of nanotechnology has led to the extensive development of some small-scale gas-sensing materials with good sensitivity. From then on, many new semiconductor materials such as ZnO, SnO 2 、WO 3 、In 2 o 3 、TiO 2 Wait to be developed. ...

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): C01G15/00G01N27/12
CPCC01G15/00G01N27/125G01N27/127C01P2002/72C01P2004/03C01P2004/04C01P2004/32C01P2004/62
Inventor 张文惠孔蒙许万银冯程杰刘子翔岳鹿关荣锋
Owner YANCHENG INST OF TECH
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