Preparation method of monodisperse nano ITO

A monodisperse and nanotechnology, applied in nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve problems that hinder the industrialization process of material preparation, difficult to control reaction conditions, special equipment requirements, etc., to improve sintering and agglomeration problems, The effect of stable product performance and low equipment requirements

Pending Publication Date: 2021-01-05
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the above-mentioned preparation method still has many defects: the preparation method with a simpler process has problems such as difficult control of the reaction conditions and easy introduction of impurities in the process of preparing finer-grained ITO powder; Special and expensive, low production efficiency and high energy consumption, hindering the industrialization process of material preparation

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  • Preparation method of monodisperse nano ITO
  • Preparation method of monodisperse nano ITO
  • Preparation method of monodisperse nano ITO

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A preparation method of monodisperse nanometer ITO, comprises the steps:

[0041] 1) Prepare 10 ml of hydrochloric acid aqueous solution with a pH value of 1 and pour it into a round-bottomed flask; then weigh 0.5 g of sodium chloride crystals, add the obtained acidic aqueous solution and fully dissolve, and mix uniformly to obtain a mixed solution I;

[0042] 2) Weigh 0.1504g of indium nitrate hydrate and 0.0179g of tin tetrachloride crystals and dissolve them in the obtained mixed solution I, then add 1.0g of cetyltrimethylammonium bromide and 100ml of benzene, mix well to form microemulsion II ;

[0043] 3) The obtained microemulsion II was subjected to azeotropic distillation at 90°C for 4 hours, and then dried to obtain a solid powder; then the dried solid powder was calcined at 600°C for 2 hours, and deionized water was passed through a centrifuge for 8000r / min wash and centrifuge to remove the salt from the sample, and finally dry the precipitate to obtain the ...

Embodiment 2

[0047] A preparation method of monodisperse nanometer ITO, comprises the steps:

[0048] 1) Prepare 20ml of nitric acid aqueous solution with a pH value of 3 and pour it into a round-bottomed flask; then weigh 0.8g of sodium sulfate crystals and add the resulting acidic aqueous solution to fully dissolve, mix well to obtain mixed solution I;

[0049] 2) Weigh 0.1504g of indium nitrate hydrate and 0.0524g of stannous chloride and dissolve it in the obtained mixed solution I, then add 0.5g of cetyltrimethylammonium bromide and 70ml of benzene, and mix uniformly to form microemulsion II;

[0050] 3) The obtained microemulsion II was subjected to azeotropic distillation at 75°C for 6h, and then dried to obtain a solid powder; then the dried solid powder was calcined at 800°C for 3h, and deionized water was passed through a centrifuge for 8000r / min wash and centrifuge to remove the salt from the sample, and finally dry the precipitate to obtain the final product.

[0051] The pro...

Embodiment 3

[0054] A preparation method of monodisperse nanometer ITO, comprises the steps:

[0055] 1) Prepare 10 ml of sulfuric acid aqueous solution with a pH value of 0.96 and pour it into a round-bottomed flask; then weigh 2.0 g of sodium chloride crystals and add the obtained acidic aqueous solution to fully dissolve, and mix well to obtain a mixed solution I;

[0056] 2) Weigh 0.2806g of indium sulfate hydrate and 0.1179g of stannous oxalate crystals and dissolve them in the obtained mixed solution I, then add 3.0g of cetyltrimethylammonium bromide and 100ml of benzene, and mix uniformly to form microemulsion II;

[0057] 3) The obtained microemulsion II was subjected to azeotropic distillation at 100°C for 6 hours, and then dried to obtain a solid powder; then, the dried solid powder was calcined at 700°C for 3 hours, and deionized water was passed through a centrifuge for 8000r / min wash and centrifuge to remove the salt from the sample, and finally dry the precipitate to obtain ...

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Abstract

The invention discloses a preparation method of monodisperse nano ITO (Indium Tin Oxide). The preparation method comprises the following steps: firstly, sequentially adding a dispersing agent, indiumsalt, tin salt, an organic solvent and a surfactant into an acidic aqueous solution, and uniformly stirring all the components to form a microemulsion; and carrying out azeotropic distillation, calcination and the like on the obtained microemulsion to obtain ITO powder. The monodisperse nano ITO is prepared by adopting an azeotropic distillation assisted reversed-phase microemulsion method: firstly, preparing a microemulsion from indium salt, tin salt, an organic solvent and a surfactant, evaporating water and an organic reagent in an azeotropic distillation manner, and then carrying out calcination and simple centrifugal separation to obtain high-purity nano ITO powder. The product is relatively high in purity, relatively good in monodispersity, high in particle spherical purity and stable in product performance, and is widely applied to the field of gas sensing. The preparation method is simple, convenient to operate and suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of inorganic functional materials, and in particular relates to a preparation method of monodisperse nanometer ITO. Background technique [0002] Indium tin oxide (Tin doped Indium Oxide, ITO) is a tin-doped indium oxide N-type semiconductor material, composed of In 2 o 3 and SnO 2 It is doped according to a certain ratio, and has two structures of cubic phase (c-ITO) and hexagonal phase (h-ITO). In addition to its excellent photoelectric properties, ITO thin films have also attracted widespread attention as sensing materials due to their advantages such as high sensitivity, small size, and high resistance to toxic gases. ITO powder is used as the basic raw material, and its dispersion and particle size are one of the important factors affecting the performance of the film; the preparation of ITO nano-powder with high dispersion, small particle size and narrow distribution is the key to obtain ITO film wi...

Claims

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Application Information

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IPC IPC(8): C01G19/00B82Y30/00B82Y40/00
CPCC01G19/00B82Y30/00B82Y40/00C01P2002/72C01P2004/04C01P2004/64
Inventor 许钰清姜兴茂柯仕苋季凯许梓欣
Owner WUHAN INSTITUTE OF TECHNOLOGY
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