Preparation method for indium oxide nanometer material

A technology of nanometer material and indium oxide, which is applied in the field of preparation of inorganic materials, can solve the problems of being unsuitable for large-scale production, high requirement of experimental conditions, high cost, etc., and achieves easy industrialized large-scale production, simple production process and low cost. Effect

Inactive Publication Date: 2012-12-19
UNIV OF ELECTRONICS SCI & TECH OF CHINA +1
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  • Abstract
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Problems solved by technology

Patent ZL201010207646.9 discloses the method of preparing indium oxide nanomaterials by hydrothermal method, using soluble indium salt and urea to react hydrothermally at 120-140°C, and then calcining to obtain indium oxide, but the prepared indium oxide is cubic or rod-shaped , and the particles are very large, for particles larger than 500nm
Alcohol thermal method is currently an important method for preparing nano-indium oxide spherical particles, but it needs to use solvents such as ethylene glycol and add surfactants to react at high temperatures. The cost of a large amount of alcohol solvents is expensive, and the experimental conditions are high. Small, not suitable for mass production

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  • Preparation method for indium oxide nanometer material
  • Preparation method for indium oxide nanometer material
  • Preparation method for indium oxide nanometer material

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Experimental program
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Effect test

Embodiment 1

[0020] Add 120ml of deionized water, then add 0.58g InCl 3 4H 2 O, stirred until completely dissolved to obtain a clear indium chloride solution. Then add 0.768g citric acid and 0.24g urea, stir to dissolve. The above solution was transferred to a polytetrafluoroethylene-lined hydrothermal kettle, sealed, and hydrothermally reacted at 150°C for 24 hours. The product after the hydrothermal reaction was filtered, washed with deionized water, and dried at 110° C. to obtain indium hydroxide nanoparticles. Indium hydroxide nanoparticles were calcined at 600°C for 1 hour to obtain indium oxide spherical nanoparticles. Observed under the electron microscope, the average diameter of this nanocomposite particle is 30nm, the particle is spherical, the particle size is uniform, and it has good dispersion. The specific surface area is 48.2m 2 / g. XRD measurement results show that chromium oxide has a better cubic crystal form.

Embodiment 2

[0022] Add 2000ml of deionized water, then add 10g InCl 3 4H 2 O, stirred until completely dissolved to obtain a clear indium chloride solution. Then add 15g citric acid and 5g urea, stir to dissolve. The above solution was transferred to a polytetrafluoroethylene-lined hydrothermal kettle, sealed, and hydrothermally reacted at 140°C for 20 hours. The product after the hydrothermal reaction was filtered, washed with deionized water, and dried at 110° C. to obtain indium hydroxide nanoparticles. Indium hydroxide nanoparticles were calcined at 550°C for 1 hour to obtain indium oxide spherical nanoparticles. Observed under the electron microscope, the average diameter of this kind of nanocomposite particles is 35nm, the particles are spherical, the particle size is uniform, and it has good dispersion. The specific surface area is 45.6m 2 / g. XRD measurement results show that chromium oxide has a better cubic crystal form.

Embodiment 3

[0024] After adding 500ml of deionized water, then add 5.8g of InCl 3 4H 2 O, stirred until completely dissolved to obtain a clear indium chloride solution. Then add 7.7g citric acid and 2.4g urea, stir to dissolve. The above solution was transferred to a polytetrafluoroethylene-lined hydrothermal kettle, sealed, and hydrothermally reacted at 160°C for 24 hours. The product after the hydrothermal reaction was filtered, washed with deionized water, and dried at 110° C. to obtain indium hydroxide nanoparticles. Indium hydroxide nanoparticles were calcined at 600°C for 1 hour to obtain indium oxide spherical nanoparticles. Observed under an electron microscope, the average diameter of this nanocomposite particle is 40nm, the particle is spherical, the particle size is uniform, and it has good dispersion. The specific surface area is 34.2m 2 / g. XRD measurement results show that chromium oxide has a better cubic crystal form.

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Abstract

The invention relates to a preparation method for an indium oxide (In2O3) nanometer material, and belongs to the technical field of preparation of inorganic materials. The preparation method comprises the following steps: firstly, carrying out a hydrothermal reaction on indium chloride to prepare indium hydroxide (In(OH)3) nanometer particles under the condition of taking lemon acid and urea as additives; and then carrying out a thermal calcination treatment to obtain the spherical In2O3 nanometer material. The method has the advantages of low cost, simplicity in production process, and easiness in industrial large-scale production. The prepared nanometer chromium oxide is a spherical particle with the diameter of about 30nm, and has the advantages of uniform particle distribution, high purity, good dispersity and large specific surface area. Therefore, the prepared nanometer chromium oxide is suitable for the fields of solar batteries, gas sensitive elements, flat-panel displays, electric light regulators, sensors and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic materials, in particular to an indium oxide (In 2 o 3 ) Preparation methods of nanomaterials. Background technique [0002] Nano-indium oxide is an important inorganic powder, which is widely used in solar cells, gas sensors, flat panel displays, electro-optic regulators, sensors, etc. At present, the methods used to synthesize indium oxide with different shapes mainly include: chemical precipitation method, hydrosolvothermal method, organic solution synthesis method, thermal injection method, sol-gel method, microemulsion method, thermal evaporation oxidation method, arc discharge method, etc. . Among these methods, the liquid-phase synthesis method has the advantages of low temperature and easy large-scale growth. Patent CN1022341030A discloses a method for preparing indium oxide nanocubes by microemulsion method, and the size of the prepared cubes is about 500nm. Patent ZL2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G15/00B82Y30/00
Inventor 祖小涛唐永亮
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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