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A high specific surface area ordered large mesoporous nickel acetone oxide gas sensitive material and preparation method thereof

A high specific surface area, acetone gas-sensing technology, applied in the direction of analytical materials, instruments, measuring devices, etc., to achieve the effect of enhancing thermal stability, accelerating response recovery speed, and large specific surface area

Active Publication Date: 2021-04-06
NINGXIA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, acetone gas-sensitive materials with high sensitivity, good stability, and detection limit lower than 2ppb still need to be further developed.

Method used

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  • A high specific surface area ordered large mesoporous nickel acetone oxide gas sensitive material and preparation method thereof
  • A high specific surface area ordered large mesoporous nickel acetone oxide gas sensitive material and preparation method thereof
  • A high specific surface area ordered large mesoporous nickel acetone oxide gas sensitive material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Mix 6.0g of surfactant P123, 216g of water and 11.8g of concentrated hydrochloric acid at 35°C, stir for 12 hours until the surfactant is completely dissolved and dispersed evenly, then add 6g of n-butanol, stir for 2 hours, then add 12.9g of silicon Ethyl acetate TEOS, stirred for 24 hours, transferred to a polytetrafluoroethylene bottle, followed by hydrothermal reaction at 40 degrees for 1 day, natural cooling, suction filtration, washing, and natural drying at room temperature, that is, the mesoporous surface containing surfactant silicon oxide. The sample surfactant P123 obtained above was removed by calcining at 550°C in air for 6 hours to obtain a white powder. The obtained ordered mesoporous silica has a specific surface area of ​​586m 2 / g, pore volume 0.67cm 3 / g, the pore size is about 3.8nm.

[0026] Disperse 2.194g of nickel nitrate into a 25mL centrifuge tube, heat it in a blast drying oven at 75°C, add 2g of mesoporous silica treated in step b as a har...

Embodiment 2

[0029] Mix 6.0g of surfactant P123, 216g of water and 11.8g of concentrated hydrochloric acid at 35°C, stir for 12 hours until the surfactant is completely dissolved and dispersed evenly, then add 6g of n-butanol, stir for 2 hours, then add 12.9g of silicon Ethyl acetate TEOS, stirred for 24 hours, transferred to a polytetrafluoroethylene bottle, followed by hydrothermal reaction at 40 degrees for 1 day, natural cooling, suction filtration, washing, and natural drying at room temperature, that is, the mesoporous surface containing surfactant silicon oxide. The sample surfactant P123 obtained above was removed by calcining at 550°C in air for 6 hours to obtain a white powder. The obtained ordered mesoporous silica has a specific surface area of ​​586m 2 / g, pore volume 0.67cm 3 / g, the pore size is about 3.8nm.

[0030] Disperse 2.194g of nickel nitrate into a 25mL centrifuge tube, heat it in a blast drying oven at 75°C, add 2g of mesoporous silica treated in step b as a hard ...

Embodiment 3

[0033] Mix 6.0g of surfactant P123, 216g of water and 11.8g of concentrated hydrochloric acid at 35°C, stir for 12 hours until the surfactant is completely dissolved and dispersed evenly, then add 6g of n-butanol, stir for 2 hours, then add 12.9g of silicon Ethyl acetate TEOS, stirred for 24 hours, transferred to a polytetrafluoroethylene bottle, followed by hydrothermal reaction at 40 degrees for 1 day, natural cooling, suction filtration, washing, and natural drying at room temperature, that is, the mesoporous surface containing surfactant silicon oxide. The sample surfactant P123 obtained above was removed by calcining at 550°C in air for 6 hours to obtain a white powder. The obtained ordered mesoporous silica has a specific surface area of ​​586m 2 / g, pore volume 0.67cm 3 / g, the pore size is about 3.8nm.

[0034] Disperse 2.194g of nickel nitrate into a 25mL centrifuge tube, heat it in a blast drying oven at 75°C, add 2g of mesoporous silica treated in step b as a har...

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Abstract

The invention relates to a gas sensitive material for detecting trace concentration of acetone and a preparation method thereof, belonging to the technical field of gas sensitive materials. The gas-sensing material is composed of helical nanowires of nickel oxide, which are periodically arranged in cubes, and has a three-dimensional self-supporting structure. The diameter of the nanowires is about 5 nanometers, and it has uniform mesopores of about 11 nanometers.

Description

technical field [0001] The invention relates to a gas sensitive material for detecting trace concentration of acetone and a preparation method thereof, belonging to the technical field of gas sensitive materials. Background technique [0002] As we all know, acetone is an important organic solvent, which is widely used in petroleum, resin plastic, rubber, leather and other industries, but at the same time, acetone gas is flammable and volatile, and can strongly stimulate the human nasal cavity and throat, anesthetize the central nervous system, and has high Hazardous. In addition, acetone in human exhaled air is an important potential biomarker for the detection of diabetes (the acetone concentration in the exhaled air of healthy people is usually 0.3-0.9ppm, while the acetone concentration in the exhaled air of diabetic patients is higher than 1.8ppm). Effective detection of acetone gas (especially at trace concentrations) is therefore of particular importance. [0003] A...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/00
CPCG01N33/0047
Inventor 赖小勇栗慧郭茹曹锟杨庆凤王晓中
Owner NINGXIA UNIVERSITY
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