A metal-doped tin oxide transparent dispersion and its preparation method

A technology of metal doping and tin oxide, applied in the field of dispersions, can solve the problems of poor particle conductivity and unreported preparation methods of dispersions, and achieve the effects of improving dispersibility, low price and easy availability

Active Publication Date: 2016-04-20
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

ATO nanoparticles with small particle size and good dispersion can be obtained by hydrothermal method or solvothermal method. However, because of maintaining good dispersion of particles, the prepared particles usually have poor conductivity without calcination process. The literature reports Among them, the highest conductivity of ATO nanoparticles prepared by hydrothermal method or solvothermal method is only 6×10 -3 S / cm
In addition, Mazumder, N et al (Curr.Appl.Phys, 2012, 975-982), Moure-Flores, F et al (Appl.Surf.Sci, 2012, 2459-2463), Pandian, S et al (Mater.Manuf.Process , 2012, 130-134), Gokulakrishnan, V et al. (J.Mater.Sci, 2011, 5553-5558) studied the preparation methods of Mg, Cd, Mn and Nb doped tin oxide respectively, and the results showed that after doping these elements Both can improve the conductivity of tin oxide, but the preparation method of related dispersions has not been reported yet.

Method used

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  • A metal-doped tin oxide transparent dispersion and its preparation method
  • A metal-doped tin oxide transparent dispersion and its preparation method

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Experimental program
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Embodiment 1

[0040] A method for preparing a metal-doped tin oxide transparent dispersion, comprising the steps of:

[0041] 1) Weigh 35.06g SnCl 4 ·5H 2 O, 1.85gMgCl 2 ·5H 2 O and 2.16gMnCl 2 4H 2 O, being dissolved in 100mL mass fraction of 3.5wt% hydrochloric acid, dropwise adding 3mol / L ammonia solution to the pH value of the system to 3 in the mixed metal salt solution, to obtain hydroxide precipitation;

[0042] 2) Disperse the generated hydroxide in ethanol, add 2.62g of sodium lauryl sulfate dropwise, control the temperature at 70°C, and reflux for 8 hours to obtain the precipitate of hydroxide coated with modifier;

[0043] 3) Transfer the precipitated hydroxide of the coating modifier to the reaction kettle, the weight ratio of the hydroxide of the coating modifier to water is 10:100; The heated product was washed several times with distilled water and ethanol until no chloride ions were detected to obtain the hydrothermal reaction product;

[0044] 4) Disperse the hydroth...

Embodiment 2

[0047] A method for preparing a metal-doped tin oxide transparent dispersion, comprising the steps of:

[0048] 1) Weigh 24.87gSn(NO 3 ) 2 · and 2.28g of Sb(NO 3 ) 3 , be dissolved in 100mL of nitric acid with a mass fraction of 3.5wt%, and dropwise add 3mol / L ammonia solution to the mixed metal salt solution until the pH of the system is 3 to obtain hydroxide precipitation;

[0049] 2) Disperse the generated hydroxide in n-propanol, add 1.31g of γ-(methacryloyloxy)propyltrimethoxysilane dropwise, control the temperature at 100°C, and reflux for 4 hours to obtain coating modification Precipitation of the hydroxide of the agent.

[0050] 3) Then disperse the precipitated hydroxide of the coating modifier into distilled water, and transfer it to the reaction kettle. The weight ratio of the hydroxide of the coating modifier to water is 30:100; 220°C hydrothermal After 5 hours, the hydrothermal product was washed several times with distilled water and ethanol until no chlorid...

Embodiment 3

[0054] A method for preparing a metal-doped tin oxide transparent dispersion, comprising the steps of:

[0055] 1) Weigh 21.47gSnSO 4 and 1.61gZnSO 4 , dissolved in 100mL of sulfuric acid with a mass fraction of 3.5wt%, and dropwise adding 3mol / L sodium hydroxide solution to the mixed metal salt solution until the pH of the system is 4 to obtain hydroxide precipitation;

[0056] 2) Disperse the generated hydroxide in n-hexane, add 1.31 g of octadecylamine dropwise, control the temperature at 120°C, and reflux for 6 hours to obtain the precipitate of hydroxide coated with modifier.

[0057] 3) Then disperse the precipitated hydroxide of the coated modifier into distilled water and transfer it to the reaction kettle. The weight ratio of the hydroxide of the coated modifier to water is 50:100; 180°C hydrothermal After 10 hours, the hydrothermal product was washed several times with distilled water and ethanol until no chloride ions were detected to obtain the hydrothermal react...

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Abstract

The invention discloses a metal-doped tin oxide transparent dispersion and its preparation method. The dispersion contains metal-doped tin oxide, a surfactant and a solvent. The solid content is 5-40wt%; particle size distribution is narrow, and particle size of particles is 5-30nm; and the dispersion is in a stable transparent state. The method comprises the following steps: 1) tin salt and salt of metal A are dissolved in acid to form a mixed salt solution; aqueous alkali is added into the mixed salt solution to generate a hydroxide precipitate; 2) the hydroxide is dispersed in an organic solvent, the surfactant is added to carry out reflux so as to obtain modifier-coated hydroxide; 3) the modifier-coated hydroxide is dispersed in water to obtain a hydroxide dispersion liquid, and the dispersion liquid reacts by a hydrothermal method; and 4) a product of the reaction by the hydrothermal method is dispersed in an organic solvent or water so as to obtain the metal-doped tin oxide dispersion. Synthesized raw materials are easily available, price is low, and production cost is low. At low hydrothermal temperature and pressure, crystal transfer of a nano-powder is realized. The prepared particles have good conductivity and dispersibility, and the dispersion has good stability and transparency.

Description

technical field [0001] The invention belongs to the field of dispersion technology, and relates to a dispersion and a preparation method thereof, in particular to a metal-doped tin oxide transparent dispersion and a preparation method thereof. technical background [0002] Metal-doped nano-tin oxide has good electrical conductivity, chemical stability and weather resistance, and it is a light-colored transparent substance, which is a transparent conductive material with excellent performance. Directly apply doped nano-tin oxide as a functional material to transparent coatings or transparent film materials to prepare functional composite materials with high visible light transmittance, which can be applied to special optical materials, conductive and antistatic devices or containers. However, the surface energy of nanoparticles is very large, they are in a highly thermodynamically unstable state, and the particles are easy to agglomerate. Adding them to a transparent organic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G19/02
Inventor 陈建峰曾翠勤曾晓飞王洁欣
Owner BEIJING UNIV OF CHEM TECH
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