Normal temperature solidified titania sol

A titanium dioxide, room temperature curing technology, applied in the direction of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve the problems of high price of organic titanium raw materials, agglomeration of nanoparticles, etc., to achieve low raw material cost, low operating temperature, Stable and transparent effect

Inactive Publication Date: 2005-09-14
INST OF CHEM CHINESE ACAD OF SCI
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a room-temperature-cured titanium dioxide sol obtained by hydrolyzing an inorganic titanium compound in order to overcome the above-mentioned defects such as the high price of organic titanium raw materials, the need for high-temperature heat treatment, and the tendency to agglomerate nanoparticles.

Method used

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Examples

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Effect test

Embodiment 1

[0033] Add 5ml of metatitanic acid solution with a concentration (based on titanium dioxide content) of 80g / l into the container, heat it to 55°C, adjust the pH value to 3.0 with a NaOH solution with a concentration of 90g / l, and then keep it warm for 0.5 Hours, the seed crystal transparent sol was obtained; after the obtained seed crystal transparent sol was continued to be heated to 80° C., 20 ml of 80 g / l metatitanic acid solution was added to the seed crystal transparent sol, and the reaction system was continued to be heated to 140 Boiling at ℃ for 1 hour, a white precipitate was obtained, which was filtered and washed to obtain a white filter cake; the obtained white filter cake was completely dispersed in 20ml of 3M HCl solution, and degummed at 25℃ for 8 hours to obtain a light blue transparent normal temperature Cured titanium dioxide sol.

[0034] Get a small amount of the above-mentioned white filter cake, after drying at normal temperature, the XRD test shows that ...

Embodiment 2

[0037]Add 3ml of titanyl sulfate solution with a concentration (based on titanium dioxide content) of 200g / l into the container, heat it to 28°C, adjust the pH value to 2.5 with a KOH solution with a concentration of 98g / l, and stir the above mixed solution for 30 Minutes later, the reaction system was heated to 35° C., and kept under stirring for 180 minutes to obtain a seed crystal transparent sol; then 30 ml of a 200 g / l titanyl sulfate solution was added to the prepared seed crystal transparent sol, and The reaction system was continued to be heated to 100°C and reacted for 5 hours. The resulting white precipitate was filtered and washed with 3% ammonia and water to obtain a white filter cake; the resulting filter cake was divided into two and dispersed in 10 and 20ml of 1.5 M HNO 3 In the solution, degumming at a temperature of 60° C. for 4 hours can obtain light blue transparent titanium dioxide sols with concentrations of 200 g / l and 100 g / l respectively.

[0038] Acco...

Embodiment 3

[0040] Add 10ml of titanium tetrachloride solution with a concentration (in terms of titanium dioxide content) of 200g / l into the container, heat it to 50°C, and adjust the pH value to 3.0 with a NaOH solution with a concentration of 140g / l, and then the reaction The system was heated to 85° C. and kept under stirring for 40 minutes; then the reaction system was further heated to 105° C. and reacted for 0.5 hour. The obtained white precipitate was filtered and washed repeatedly to obtain 10 g of filter cake. This 10 g filter cake was added to 30 ml concentration of 0.05M H 3 PO 4 The solution was degelized at 85° C. for 5 hours to obtain a light blue transparent titanium dioxide sol.

[0041] According to the measurement method of Example 1, the white filter cake titanium dioxide crystal form obtained in this example is anatase type; the particle size distribution is narrow and uniform, and the range is 30-80nm.

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Abstract

A TiO2 sol able to be solidified at ordinary temp to become anatase crystal type TiO2 is prepared through hydrolyzing the compound of inorganic titanium to obtain spontaneous crystal seed, ordinary-pressure hydrolyzing inorganic titanium compound under the action of said crystal seed to obtain white deposit, and dissolving in inorganic acid. Its advantages are low cost, low operation temp, and no pollution.

Description

technical field [0001] The invention relates to titanium dioxide sol, in particular to a preparation method of normal temperature solidified titanium dioxide sol. Background technique [0002] Nano-titanium dioxide refers to titanium dioxide with a particle size within 100 nanometers. In recent years, the self-cleaning, antibacterial, anti-fog and photocatalytic properties of nano-titanium dioxide have attracted widespread attention, especially the research and development of self-cleaning nano-titanium dioxide coatings have been reported in a series of patents and literature. For example, CN1224036A discloses a titanium dioxide sol mixed with inorganic compound nanoparticles prepared by the sol-gel method, and the titanium dioxide film material coated by the titanium dioxide sol can reach a high degree of hydrophilicity after ultraviolet light irradiation properties, so this titanium dioxide sol can be used for anti-fogging and self-cleaning on the surface of glass, tiles,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/00C01G23/04C01G23/047
Inventor 张玲娟刘必前江雷
Owner INST OF CHEM CHINESE ACAD OF SCI
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