Preparation method and application of hydrogen sulfide gas sensor based on titanium dioxide nanosheet supported noble metal

A gas sensor, titanium dioxide technology, applied in the direction of instruments, scientific instruments, measuring devices, etc., can solve the problems of non-reusable, low sensitivity, etc., and achieve the effect of increasing electron transfer capacity, solving fast response, and convenient operation

Inactive Publication Date: 2016-06-29
UNIV OF JINAN
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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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  • Preparation method and application of hydrogen sulfide gas sensor based on titanium dioxide nanosheet supported noble metal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

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

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

[0033] First, add 0.8mmol cerium salt and 1.2mmol manganese salt to 5mL tetrabutyl titanate, slowly add 0.8mL hydrofluoric acid during stirring, react in the reactor at 200°C for 18 hours, cool to room temperature, After centrifuging and washing with ultrapure water and absolute ethanol three times, vacuum-dry at 50°C; secondly, mix 250 mg of the dried solid with 400 mg of melamine, and grind it into a powder; then, put the ground powder into a muffle furnace, The heating rate is 3°C / min, and calcined at 560°C for 0.5 hours; finally, the calcined powder is cooled to room temperature to obtain 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 preparation method of a hydrogen sulfide gas sensor, in particular to a gas-sensitive sensor established based on a novel two-dimensional composite nanomaterial and belongs to the technical field of novel nano functional materials and environment monitoring. The sensor can be used for detecting the content of hydrogen sulfide gas in an environment. A cerium and magnesium bi-metal co-doped titanium dioxide nanosheet in-situ composite carbon nitride two-dimensional composite nanomaterial CeMn-TiO2 / g-C3N4 is prepared firstly. Through the characteristics that the material has the large specific area, and high mesoporous gas adsorption and multiple characteristics that electron transfer affects sensitivity due to the material surface gas change, the gas-sensitive sensor which is sensitive to and rapidly responds to the hydrogen sulfide gas is established.

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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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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