Preparation method of tin dioxide self-assembly nanostructure microsphere

A nanostructure and tin dioxide technology, applied in the field of preparation of nanocone self-assembled spheres, to achieve uniform structure, low cost, and universal applicability

Inactive Publication Date: 2011-05-18
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, is there any material that has better gas-sensing performance than hollow spheres?

Method used

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  • Preparation method of tin dioxide self-assembly nanostructure microsphere
  • Preparation method of tin dioxide self-assembly nanostructure microsphere
  • Preparation method of tin dioxide self-assembly nanostructure microsphere

Examples

Experimental program
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Effect test

Embodiment 1

[0041] (1) First, weigh 1 mmol of sodium stannate trihydrate and 2 mmol of cetyltrimethylammonium bromide into a mixed solvent of 5 ml of ethanol and 17.5 ml of water.

[0042] (2) Add 5ml of ethanolamine solution into the mixed solution of (1), and stir with a glass rod for 5 minutes until the solution is evenly mixed. (3) the solution is transferred to a volume of 45ml and has a polytetrafluoroethylene-lined stainless steel autoclave, the filling degree is 61%, put into an oven and carry out hydrothermal reaction, the temperature is 180 ℃, and the reaction time is 24 hours. After cooling down to room temperature, the bottom product was washed by centrifugation.

[0043] (4) Add dehydrated ethanol to the bottom product and centrifuge at 4500r / min at a rotating speed for 5min, remove the supernatant and then add deionized water to centrifuge at 4500r / min for 5min, remove the supernatant and then add absolute ethanol at a rotating speed of 4500r / min Centrifuge for 5 min at 1 m...

Embodiment 2

[0048] (1) First, weigh 1 mmol of sodium stannate trihydrate and 2 mmol of cetyltrimethylammonium bromide into a mixed solvent of 15 ml of ethanol and 7.5 ml of water.

[0049] (2) Add 5ml of ethanolamine solution into the mixed solution of (1), and stir with a glass rod for 5 minutes until the solution is evenly mixed.

[0050] (3) the solution is transferred to a volume of 45ml and has a polytetrafluoroethylene-lined stainless steel autoclave, the filling degree is 61%, put into an oven and carry out hydrothermal reaction, the temperature is 180 ℃, and the reaction time is 24 hours. After cooling down to room temperature, the bottom product was washed by centrifugation.

[0051] (4) Add dehydrated ethanol to the bottom product and centrifuge at 4500r / min at a rotating speed for 5min, remove the supernatant and then add deionized water to centrifuge at 4500r / min for 5min, remove the supernatant and then add absolute ethanol at a rotating speed of 4500r / min Centrifuge for 5 m...

Embodiment 3

[0056] (1) First, weigh 1 mmol of sodium stannate trihydrate and 2 mmol of cetyltrimethylammonium bromide into a mixed solvent of 17 ml of ethanol and 5.5 ml of water.

[0057] (2) Add 5ml of ethanolamine solution into the mixed solution of (1), and stir with a glass rod for 5 minutes until the solution is evenly mixed.

[0058] (3) the solution is transferred to a volume of 45ml and has a polytetrafluoroethylene-lined stainless steel autoclave, the filling degree is 61%, put into an oven and carry out hydrothermal reaction, the temperature is 180 ℃, and the reaction time is 24 hours. After cooling down to room temperature, the bottom product was washed by centrifugation.

[0059] (4) Add dehydrated ethanol to the bottom product and centrifuge at 4500r / min at a rotating speed for 5min, remove the supernatant and then add deionized water to centrifuge at 4500r / min for 5min, remove the supernatant and then add absolute ethanol at a rotating speed of 4500r / min Centrifuge for 5 m...

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Abstract

The invention discloses a preparation method of a tin dioxide self-assembly nanostructure microsphere, belonging to the preparation method of inorganic advanced nanometer materials. The preparation method comprises the following steps of: a, adding sodium stannate trihydrate and surfactant to a mixed solvent of alcohol and water, and then adding ethanolamine, wherein the mol ratio of the sodium stannate trihydrate to the surfactant is 1:2-1:3, the volume ratio of the alcohol to the water in the mixed solvent is 1:3.5-3:1, the amount of the added ethanolamine is 2-5ml in each 1mmol sodium stannate trihydrate; b, mixing the solvent and the solute at the step a by using a glass bar to obtain a uniformly distributed mixed solution; c, arranging the obtained mixed solution of the step b into areaction kettle to carry out the hydrothermal reaction for 1-48h at 140-200 DEG C, and then naturally cooling to the room temperature after the reaction is finished; and d, centrifugally washing the obtained precipitation of the step c with water and anhydrous alcohol to obtain the tin dioxide self-assembly nanostructure microsphere. In the preparation method, the synthesis is carried out under the condition of solvent heat, the method is simple; and the tin dioxide self-assembly nanostructure microsphere has the advantages of low cost, even structure, uniform size distribution, universality and controllability, and also provides wide application prospect for gas sensitive devices.

Description

technical field [0001] The invention relates to a preparation method of tin dioxide self-assembled nanostructure microspheres, in particular to a preparation method of nanocone self-assembled spheres, and belongs to the technical field of inorganic advanced nanomaterial preparation technology. Background technique [0002] In a highly developed information society, sensor components play an increasingly important role. Gas sensor is one of them, and it plays an irreplaceable role in drunk driving, coal mining, fire prevention, etc. Tin dioxide is an important member of the wide-gap semiconductor family, belonging to n-type semiconductors, and its energy gap width reaches 3.6eV. It is the earliest and one of the most important materials used in gas sensing. SnO 2 Gas sensor has become one of the key points in the development of gas sensor because of its good stability, ability to work at a lower working temperature, and more types of gas to be tested. [0003] As we all k...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G19/02B82Y40/00
Inventor 孙晓明陈国兵罗亮
Owner BEIJING UNIV OF CHEM TECH
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