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Preparation method and application of novel CoTiO3 gas sensitive material

A gas-sensitive material, ethylene glycol methyl ether technology, applied in nanotechnology, analytical materials, material resistance and other directions for materials and surface science, can solve problems such as air pollution and indoor environmental pollution, achieve fast response speed, High sensitivity effect

Active Publication Date: 2017-01-04
HUAWEI TEHCHNOLOGIES CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Not only the atmosphere is polluted, but the indoor environment is also seriously polluted

Method used

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  • Preparation method and application of novel CoTiO3 gas sensitive material
  • Preparation method and application of novel CoTiO3 gas sensitive material
  • Preparation method and application of novel CoTiO3 gas sensitive material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0030] This example provides CoTiO 3 The preparation method and gas sensitivity of nanomaterials, the specific steps are as follows:

[0031] a) Weigh 0.01 mol of tetra-n-butyl titanate and slowly drop it into 50 ml of ethylene glycol methyl ether solvent, and magnetically stir to make it fully dissolved. Weigh 0.01mol of cobalt nitrate hexahydrate and add it to the mixed solution, stir well to obtain a deep purple solution, weigh 0.02mol of citric acid monohydrate, add it to the deep purple solution, and weigh 0.1g of hexadecyl Trimethylammonium bromide dispersant (CTAB) was added to the solution to obtain a transparent mixed solution. The solution concentration is about 0.2mol / L, the Co in the solution 2+ and Ti 4+ The ratio of ions is 1:1, metal cations (Co 2+ and Ti 4+ Sum) and the mol ratio of citric acid are 1:1.

[0032] b) After standing for 24 hours, put it into an oven and bake at 90°C for 24 hours; then bake at 120°C for 24 hours to obtain a honeycomb-shaped x...

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Abstract

The invention discloses a novel CoTiO3 gas sensitive material.Cobalt nitrate hexahydrate and tetra-n-butyl titanate serve as precursors, ethylene glycol methyl ether serves as solvent, citric acid serves as a complexing agent, polyethylene glycol, polyethylene pyrrolidone, hexadecyl trimethyl ammonium bromide respectivelyserve as a dispersant, a sol-gel method is adopted to preparea CoTiO3 nano material, and the CoTiO3 nano material isapplied toa Al2O3 substrate with a Ag-Pd interdigital electrode to make a planar gas sensitive device. The made planar gas sensitive device is fairly short in response / recovery time to ethanol and acetone gas, only needs about 15 seconds, is high in sensitivity and is thenovel gas sensitive material.

Description

technical field [0001] The invention belongs to the technical field of gas sensors, and adds various dispersants to change the specific surface area of ​​the nanomaterials when the sol-gel method is used to grow nanomaterials, thereby obtaining novel gas-sensitive materials with high sensitivity. Background technique [0002] With the improvement of living standards, environmental pollution is getting worse. Not only the atmosphere is polluted, but also the indoor environment is seriously polluted. Today, with the development of science and technology and productivity, in order to predict gas pollutants and take active measures to eliminate or reduce gas pollution, it is undoubtedly a long-term task to explore new gas-sensitive materials. In order to improve the sensitivity of semiconductor gas sensors, researchers have made various attempts, such as doping modification, adding dispersants, complexing agents and other measures to improve the gas-sensing performance. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12C01G51/00B82Y30/00
CPCB82Y30/00C01G51/00C01P2002/72G01N27/127
Inventor 张亚梅苏杭韩汝取董松涛许红祥汪园香步青华
Owner HUAWEI TEHCHNOLOGIES CO LTD