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Preparation method for spherical tin dioxide self-assembled from nano-fragments

A tin dioxide and self-assembly technology, applied in the directions of tin oxide, nanotechnology, nanotechnology, etc., can solve the problems of difficult tin dioxide morphology, complicated operation, large energy consumption, etc., and achieve easy control of process parameters and preparation process. Simple, uniform particle size effect

Active Publication Date: 2015-04-29
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing preparation methods have problems such as complicated operation, high cost, and high energy consumption. Some methods need to add surfactants, etc., and some methods are difficult to control the morphology of tin dioxide.

Method used

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  • Preparation method for spherical tin dioxide self-assembled from nano-fragments
  • Preparation method for spherical tin dioxide self-assembled from nano-fragments
  • Preparation method for spherical tin dioxide self-assembled from nano-fragments

Examples

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Effect test

Embodiment 1

[0022] A method for preparing spherical tin dioxide self-assembled by nano-fragments, comprising the steps of:

[0023] (1) Dissolve 3g of tin tetrachloride in 50ml of ethanol, after fully dissolved, add 1.5g of terephthalic acid, then add 0.20~0.30ml of 40% hydrofluoric acid, continue stirring for 30min to fully mix ;

[0024] (2) Transfer the mixed solution obtained in step (1) into the reactor, and react at a constant temperature of 220°C for 13 hours;

[0025] (3) After the reaction kettle is cooled, the sample is taken out, and the product is obtained after centrifugation, washing and drying.

Embodiment 2

[0027] A method for preparing spherical tin dioxide self-assembled by nano-fragments, comprising the steps of:

[0028] (1) Dissolve 3.8g of tin tetrachloride in 50ml of ethanol, after fully dissolved, add 1.2g of terephthalic acid, then add 0.30~0.50ml of hydrofluoric acid with a concentration of 40%, and continue stirring for 30min to fully mix;

[0029] (2) Transfer the mixed solution obtained in step (1) into the reactor, and react at a constant temperature of 220°C for 13 hours;

[0030] (3) After the reaction kettle is cooled, the sample is taken out, and the product is obtained after centrifugation, washing and drying.

Embodiment 3

[0032] A method for preparing spherical tin dioxide self-assembled by nano-fragments, comprising the steps of:

[0033] (1) Dissolve 3.5g of tin tetrachloride in 55ml of ethanol. After fully dissolving, add 2g of terephthalic acid, then add 2ml of acetic acid with a concentration of 99.8%, and continue to stir for 30 minutes to fully mix;

[0034] (2) Transfer the mixed solution obtained in step (1) into the reactor, and react at a constant temperature of 220°C for 12 hours;

[0035] (3) After the reaction kettle is cooled, the sample is taken out, and the product is obtained after centrifugation, washing and drying.

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Abstract

The invention relates to preparation for tin dioxide, and specifically discloses a preparation method for spherical tin dioxide self-assembled from nano-fragments. The preparation method comprises the following steps: (1) dissolving 3-4g of stannic chloride in 50-55ml of ethanol, adequately dissolving, then adding 1-2g of terephthalic acid, then adding hydrofluoric acid or hydrochloric acid or formic acid or acetic acid, and further stirring to adequately mix; (2) transferring the mixed solution obtained in the step (1) in a reaction kettle, and reacting for 12-14h at a constant temperature of 220 DEG C; (3) cooling the reaction kettle, then taking out a sample, and performing centrifuging, washing and drying treatment, thereby obtaining the product. The method is simple in preparation process, convenient to operate, and easy for process parameter control; the spherical tin dioxide self-assembled from the nano-fragments is uniform in granularity, high in dispersity, and can be used for air-sensitive detection for low-concentration volatile organic compounds.

Description

technical field [0001] The invention relates to the preparation of tin dioxide, in particular to a method for preparing spherical tin dioxide self-assembled from nano fragments. Background technique [0002] Tin dioxide is an important inorganic material and a promising semiconductor material, widely used in ceramics, photocatalysis, photoelectric catalysis and gas sensing and other fields. [0003] The production of tin dioxide in my country has a long history, and the traditional nitric acid production process is adopted. That is, tin is dissolved in nitric acid to generate metastannic acid, and after repeated washing, drying, calcining, and crushing, yellow tin dioxide is obtained. This method consumes a lot of nitric acid, causes serious environmental pollution, high tin consumption, low product purity, and poor color. To high-end goods requirements. Therefore, tin dioxide still depends on imports. [0004] At present, the preparation of nano-tin oxides with different...

Claims

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Application Information

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IPC IPC(8): C01G19/02B82Y30/00
CPCC01G19/02C01P2002/72C01P2004/03C01P2004/62
Inventor 杜建平赵瑞花杨江峰李晋平
Owner TAIYUAN UNIV OF TECH
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