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Method for preparing stable nano anatase titanium dioxide alcohol phase sol at low temperature

A technology of titanium dioxide and nano-anatase, applied in the direction of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve problems such as agglomeration, and achieve good sol stability, easy mass production, and simple preparation process Effect

Active Publication Date: 2016-06-15
YUNNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The SEM image of the sol prepared by this method shows that the particles are uniform, but there is agglomeration

Method used

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  • Method for preparing stable nano anatase titanium dioxide alcohol phase sol at low temperature
  • Method for preparing stable nano anatase titanium dioxide alcohol phase sol at low temperature
  • Method for preparing stable nano anatase titanium dioxide alcohol phase sol at low temperature

Examples

Experimental program
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Effect test

Embodiment 1

[0035] In the 2-methoxyethanol solution mixed with ethyl acetate and hydrochloric acid, add tetraethyl titanate dropwise, then add an appropriate amount of acrylic acid, and finally add water-containing 2-methoxyethanol solution. After stirring for 20 hours, the pH value of the reactant was controlled to be 5, and a transparent and stable anatase titanium dioxide alcohol phase sol was obtained. Finally, a semi-permeable membrane with a pore size of 1nm is used as the sol-wrapped sol in the dialysis process, and placed in isopropanol solvent to remove Cl - ion. The molar ratio of tetraethyl titanate, ethanol, distilled water or deionized water, ethyl acetate, acrylic acid, and hydrochloric acid is 1:40:1:2:1:1.5;

Embodiment 2

[0037] Add tetrapropyl titanate dropwise to the n-butanol solution mixed with glycerol, nitric acid and hydrochloric acid, then add an appropriate amount of acetic acid, and finally add water-containing n-butanol solution, and stir at normal pressure and 40°C for 24 hours. The pH value of the reactant is controlled to be 3 to obtain a transparent and stable anatase titanium dioxide alcohol phase sol. Finally, a semi-permeable membrane with a pore size of 1nm is used as the sol-wrapped sol in the dialysis process, and placed in isopropanol solvent to remove Cl - ion. The molar ratio of the mixed solution of tetrapropyl titanate, n-butanol, distilled water or deionized water, glycerin, acetic acid, nitric acid and hydrochloric acid is 1:30:1.5:2:1.5:1;

Embodiment 3

[0039] Add tetrabutyl titanate dropwise to the isopropanol solution mixed with acetic acid and hydrochloric acid, then add an appropriate amount of MAP, and finally add aqueous isopropanol solution, stir at normal pressure and 80°C for 48 hours, and control the pH of the reactant When the value is 3, a transparent and stable anatase titanium dioxide alcohol phase sol is obtained. Finally, a semi-permeable membrane with a pore size of 1nm is used as the sol-wrapped sol in the dialysis process, and placed in isopropanol solvent to remove Cl - ion. The molar ratio of tetrabutyl titanate, isopropanol, distilled water or deionized water, acetic acid, MAP, hydrochloric acid mixed solution is 1:25:2:3:2:0.8;

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Abstract

The invention relates to a method for preparing a stable nano anatase titanium dioxide alcohol phase sol, which belongs to a preparation method of a semiconductor photoelectric material. The invention provides a simple method for preparing a nano anatase titanium dioxide nano nanocrystalline alcohol phase sol at low temperature by using a one-step method, and the raw materials comprise a titanium-containing organic matter, an organic solvent, distilled water or deionized water, a dispersant, a hydrolysis inhibitor and a catalyst with a corresponding mol ratio of 1:(20-100):(0.5-3):(1-5):(0.1-3):(0.01-1.5). According to the invention, the titanium organic matter is added in an alcoholic solution mixed with the dispersant and the catalyst, the hydrolysis inhibitor and the water are added, the materials are stirred for 3-48 hours under normal pressure and at the temperature of 25-100 DEG C, a pH value of a reactant is controlled to 1-5, and the transparent stable nano anatase titanium dioxide alcohol phase sol can be obtained. A hydrolysis intermediate product can be removed by using a dialysis technology finally. The sol has the advantages of good sol crystallinity, stability and transmittance performance, and concentration of the sol can be diluted by alcohol according to requirement. The prepared sol enables direct film forming on various high temperature-resistant or high-temperature-intolerant material substrates, and also can be used for directly preparing photocatalytic aqueous environmentally-friendly coatings or visible light-excited photocatalytic environmentally-friendly coatings.

Description

technical field [0001] The invention belongs to the preparation method of nano-titanium dioxide, a semiconductor optoelectronic material, in particular to an anatase-type titanium dioxide alcohol phase used as a dye-sensitized, organic, inorganic or organic / inorganic hybrid solar cell electrode, self-cleaning film, dense layer or porous layer Low temperature preparation method of sol. Background technique [0002] As a wide bandgap inorganic semiconductor material, nano-titanium dioxide is widely used in the photocatalytic degradation of organic matter in the purification environment and the electron transport of solar cells due to its stable physical and chemical properties, good photocatalytic activity, and strong corrosion resistance. It is a material with broad application prospects in the fields of anti-fog and self-cleaning. [0003] In recent years, in the research and development of organic solar cells and perovskite solar cells, it has been found that using anatase...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/00C01G23/053
CPCB01J13/0047C01G23/053
Inventor 靳映霞柳清菊朱忠其张瑾
Owner YUNNAN UNIV
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