Nano zinc metastannate air-sensitive material with hollow fiber structure and preparation method thereof

A technology of nano-zinc metastannate and fiber structure, which is applied in the field of sensing materials, can solve the problems of gas-sensing materials without hollow structure, small specific surface area, and limited gas sensitivity, so as to facilitate adsorption and desorption, preparation The method is simple and the effect of good sensitivity

Inactive Publication Date: 2011-07-20
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above technologies all have complicated process, high cost, and low efficiency. The resulting gas-sensitive materials do not have a hollow structure, and the specific surface area is small, which limits the play of gas sensitivity.

Method used

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  • Nano zinc metastannate air-sensitive material with hollow fiber structure and preparation method thereof
  • Nano zinc metastannate air-sensitive material with hollow fiber structure and preparation method thereof
  • Nano zinc metastannate air-sensitive material with hollow fiber structure and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] The preparation method of hollow fiber structure nano-zinc metastannate gas sensitive material comprises the above steps:

[0025] 1) Pretreatment of the absorbent cotton fiber biological template: rinse the absorbent cotton balls with deionized water and absolute ethanol repeatedly, dry them, and pull them loosely;

[0026] 2) The configuration of the mixed solution of zinc nitrate and tin tetrachloride: the concentration is 0.2 mol / L, and the solute is soluble SnCl 4 ·5H 2 O and Zn(NO 3 ) 2 ·6H 2 O, the two molar ratios are 1:1, and the solvent is deionized water;

[0027] 3) The pretreated absorbent cotton fibers are soaked in the mixed solution for 24 hours, then taken out and put into a drying oven to dry;

[0028] 4) Put the cotton fiber obtained in step 3) into a muffle furnace, raise the temperature to 500°C at a rate of 1°C / min, keep it warm for 3 hours, then stop heating, and take out the burnt product after the furnace temperature is naturally cooled to ...

Embodiment 2

[0036] The preparation method of hollow fiber structure nano-zinc metastannate gas sensitive material comprises the above steps:

[0037]1) Pretreatment of the absorbent cotton fiber biological template: rinse the absorbent cotton balls with deionized water and absolute ethanol repeatedly, dry them, and pull them loosely;

[0038] 2) The configuration of the mixed solution of zinc chloride and tin tetrachloride: the concentration is 0.2 mol / L, the molar ratio of the two is 1:1, and the solvent is deionized water;

[0039] 3) The pretreated absorbent cotton fibers are soaked in the mixed solution for 48 hours, then taken out and put into a drying oven to dry;

[0040] 4) Put the cotton fiber obtained in step 3) into a muffle furnace, heat up to 600°C at a heating rate of 3°C / min, keep it warm for 3 hours, then stop heating, and take out the burnt product after the furnace temperature is naturally cooled to room temperature, and you can get Zinc metastannate gas sensitive mater...

Embodiment 3

[0048] The preparation method of hollow fiber structure nano-zinc metastannate gas sensitive material comprises the above steps:

[0049] 1) Pretreatment of the absorbent cotton fiber biological template: rinse the absorbent cotton balls with deionized water and absolute ethanol repeatedly, dry them, and pull them loosely;

[0050] 2) The configuration of the mixed solution of zinc chloride and tin dichloride: the concentration is 0.5 mol / L, the molar ratio of the two is 1:1, and the solvent is deionized water;

[0051] 3) The pretreated absorbent cotton fibers are soaked in the mixed solution for 12 hours, then taken out and placed in a drying oven to dry;

[0052] 4) Put the cotton fiber obtained in step 3) into a muffle furnace, heat up to 700°C at a heating rate of 5°C / min, keep it warm for 3 hours, then stop heating, and take out the burnt product after the furnace temperature is naturally cooled to room temperature, and you can get Zinc metastannate gas sensitive materi...

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Abstract

The invention belongs to the technical field of sensing materials, in particular to a nano zinc metastannate air-sensitive material with a hollow fiber structure and a preparation method thereof. In the technical scheme provided by the invention, the nano zinc metastannate air-sensitive material with the hollow fiber structure comprises zinc metastannate, and has the fiber diameter of between 10 micrometers and 15 micrometers and the wall thickness of about 160-200 nanometers; the entire wall layer consists of zinc metastannate nanorods with the lengths of between 100 nanometers and 160 nanometers and the diameters of between 40 nanometers and 50 nanometers and has the specific surface area of between 36.12 m<2> / g and 28.25 m<2> / g. The invention also provides the preparation method of thenano zinc metastannate air-sensitive material with the hollow fiber structure, the preparation method has the advantages of simple and flexible preparation process, low cost, and capability of effectively controlling the sizes of crystalline dimensions, and the prepared nano zinc metastannate air-sensitive material with the hollow fiber structure has the characteristics of high sensitivity and selectivity to ethanol and quick response and recovery capabilities.

Description

technical field [0001] The invention belongs to the technical field of sensing materials, and in particular relates to a hollow fiber structure nanometer zinc metastannate gas sensitive material and a preparation method thereof. Background technique [0002] Ethanol has a wide range of applications in industry, and can be used to manufacture acetic acid, beverages, flavors, dyes, etc.; medically, ethanol with a volume fraction of 70%-75% is also commonly used as a disinfectant; in recent years, using bioenergy technology, crops Producing ethanol as a raw material and blending it into gasoline can provide an environmentally friendly renewable alternative energy source. The use of alcohol-containing gasoline can reduce gasoline consumption, increase the oxygen content of fuel, make combustion more complete, and reduce CO and other pollution in combustion emission of matter. Fuel ethanol has been preliminarily popularized in the United States, Brazil and other countries, and f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G19/00G01N27/12B82Y40/00B82Y30/00
Inventor 宋鹏王琦杨中喜
Owner UNIV OF JINAN
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