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A preparation method and application of a hydrogen sulfide gas sensor based on titanium dioxide nanosheets loaded with noble metals

A gas sensor, titanium dioxide technology, applied in instruments, scientific instruments, measuring devices, etc., can solve problems such as low sensitivity and inability to reuse, achieve rapid response, increase electron transfer capacity, and solve specific detection of hydrogen sulfide effect of gas

Inactive Publication Date: 2018-03-27
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the chemical inspection method is simple to operate, it has the disadvantages of low sensitivity and cannot be reused; the instrumental inspection method mainly uses hydrogen sulfide gas detection instruments to quantitatively detect the concentration of hydrogen sulfide gas in the air, which has high sensitivity, reusability, and automation. High degree of advantages, and is widely used in industrial production

Method used

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  • A preparation method and application of a hydrogen sulfide gas sensor based on titanium dioxide nanosheets loaded with noble metals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1 CeMn-TiO 2 / g -C 3 N 4 preparation of

[0025] First, add 0.8 mmol of cerium salt and 0.8 mmol of manganese salt into 5 mL of tetrabutyl titanate, slowly add 0.5 mL of hydrofluoric acid during stirring, react in the reactor at 160 °C for 24 hours, and cool to room temperature , washed with ultrapure water and absolute ethanol for three times, then vacuum-dried at 50°C; secondly, 150 mg of the dried solid was mixed with 400 mg of melamine, and ground into a powder; then, the ground powder was put into a muffle In the furnace, the heating rate is 1 ℃ / min, and it is calcined at 480 ℃ for 5 hours; finally, the calcined powder is cooled to room temperature, and the CeMn-TiO 2 / g -C 3 N 4 ;

[0026] Described cerium salt is cerium sulfate;

[0027] Described manganese salt is manganese sulfate.

Embodiment 2

[0028] Example 2 CeMn-TiO 2 / g -C 3 N 4 preparation of

[0029] First, add 0.8 mmol cerium salt and 1.0 mmol manganese salt to 5 mL tetrabutyl titanate, slowly add 0.65 mL hydrofluoric acid during stirring, react in the reactor at 180 °C for 21 hours, and cool to room temperature , washed three times with ultra-pure water and absolute ethanol, and vacuum-dried at 50°C; secondly, take 200 mg of the dried solid and mix it with 400 mg of melamine, and grind it into a powder; then, put the ground powder into a muffle In the furnace, the heating rate is 2 ℃ / min, and calcined at 520 ℃ for 2 hours; finally, the calcined powder is cooled to room temperature, and the CeMn-TiO 2 / g -C 3 N 4 ;

[0030] Described cerium salt is cerium chloride;

[0031] Described manganese salt is manganese chloride.

Embodiment 3

[0032] Example 3 CeMn-TiO 2 / g -C 3 N 4 preparation of

[0033] First, add 0.8 mmol of cerium salt and 1.2 mmol of manganese salt into 5 mL of tetrabutyl titanate, slowly add 0.8 mL of hydrofluoric acid during stirring, react in the reactor at 200 °C for 18 hours, and cool to room temperature , washed with ultrapure water and absolute ethanol for three times, then vacuum-dried at 50°C; secondly, 250 mg of the dried solid was mixed with 400 mg of melamine, and ground into a powder; then, the ground powder was put into a muffle In the furnace, the heating rate is 3 ℃ / min, and calcined at 560 ℃ for 0.5 hours; finally, the calcined powder is cooled to room temperature, and the CeMn-TiO 2 / g -C 3 N 4 ;

[0034] Described cerium salt is cerium nitrate;

[0035] Described manganese salt is manganese nitrate.

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Abstract

The invention relates to a method for preparing a hydrogen sulfide gas sensor, in particular to a gas sensor constructed based on a novel two-dimensional nanocomposite material, which can be used to detect the hydrogen sulfide gas content in the environment. It belongs to the technical field of new nanometer functional materials and environmental monitoring. The present invention firstly prepares a kind of cerium and manganese bimetallic co-doped titanium dioxide nanosheet in-situ composite carbon nitride two-dimensional nanocomposite material CeMn-TiO2 / g-C3N4, utilizes the material's large specific surface area, mesoporous high gas Adsorption characteristics and electron transfer are sensitive to many characteristics affected by gas changes on the surface of the material, and the construction of a gas sensor with sensitivity and rapid response to hydrogen sulfide gas is realized.

Description

technical field [0001] The invention relates to a method for preparing a hydrogen sulfide gas sensor, and belongs to the technical field of novel nanometer functional materials and environmental monitoring. Background technique [0002] Hydrogen sulfide, molecular formula H 2 S, with a molecular weight of 34.076, is a flammable acid gas under standard conditions, colorless, smells like rotten eggs at low concentrations, is highly toxic, is a strong neurotoxin, and has a strong stimulating effect on mucous membranes. Inhalation of a small amount of high concentration Hydrogen sulfide can be fatal in a short time. Low concentrations of hydrogen sulfide have effects on the eyes, respiratory system and central nervous system. [0003] The detection methods for hydrogen sulfide gas mainly include chemical inspection method and instrument inspection method. Although the chemical inspection method is simple to operate, it has the disadvantages of low sensitivity and cannot be re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/12
CPCG01N27/127
Inventor 张勇王琦庞雪辉马洪敏吴丹
Owner UNIV OF JINAN
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