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Sol of nano titania and preparation method

A nano-titanium dioxide, titanium dioxide technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of unusable, lowering the photocatalytic effect, and the product cannot reach the non-toxic level, etc., and achieves high and good industrial yield. Water soluble, easy to produce effects

Inactive Publication Date: 2005-01-12
辛华鹏
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sol produced by this method is added with an organic solvent such as a dispersant and a binder to improve adhesion, and the organic solvent will wrap the nano-titanium oxide particles, which will significantly reduce the photocatalytic effect.
Moreover, the products produced by this method cannot reach the actual non-toxic level, and cannot be used in industries such as medical treatment, medicine, and food.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Weigh 6 g of sodium hydroxide, dissolve it into 300 ml of distilled water, stir to dissolve, and dissolve 7.1 g of TiCl 4 Slowly add sodium hydroxide aqueous solution to hydrolyze, and then use centrifugation (membrane separation or electrophoresis desalination) to make Cl - The content is less than 50ppm. The desalted titanium hydroxide sol was crystallized at 200° C. for 8 hours to obtain anatase type nano-titanium dioxide sol.

Embodiment 2

[0017] Weigh 6 grams of sodium hydroxide, dissolve it into 300 milliliters of distilled water, stir to dissolve, and dissolve 9.0 grams of Ti(SO 4 ) 2 Slowly add sodium hydroxide aqueous solution to hydrolyze, and then use centrifugation (membrane separation or electrophoresis desalination) to make SO 4 2- The content is less than 50ppm. The desalted titanium hydroxide sol was crystallized at 200° C. for 8 hours to obtain anatase type nano-titanium dioxide sol.

Embodiment 3

[0019] Measure 10.2 mL of ammonia water (25%), add distilled water to a volume of 300 mL, add 7.1 g of TiCl 4 Slowly add ammonia water to stir, hydrolyze, and then use centrifugation (membrane separation or electrophoresis desalination) to make Cl - The content is less than 50ppm. The desalted titanium hydroxide sol is crystallized under the condition of 80°C-200°C for 8 hours to obtain anatase type nano titanium dioxide sol.

[0020] The nano-titanium dioxide sol provided by the embodiment of the present invention includes nano-titanium dioxide particles and a solvent; wherein the content of the nano-titanium dioxide particles is 0.1% to 5% of the total amount of the sol; and the particle size of the titanium dioxide nanoparticles is between 3 and 100 nanometers.

[0021] The solvent used in the examples of the present invention is water. The content of nano titanium dioxide particles is 0.1% to 2% of the total sol; the particle size of titanium dioxide nanoparticles is bet...

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Abstract

The prepn. steps are: creating amorphous neutral titanium oxide pulp material by chemical method, washing chlorion to less than 50 ppm by deionized water, proceeding ultrasonic dispersion to the pulp after adding lanthanum nitrate or zinc ferrite then senting the pulp into reaction boiler, increasing temp. to 80-200 deg.C, taking it out after being crystallized 8-72 hours, the nanometre titanium dioxide sol with photochemical function is produced. The sol has good water-solubility, 99.9 percent bactericidal ratio with 0.8 percent density and on condition of natural lighting.

Description

Technical field: [0001] The invention belongs to an antibacterial material and a preparation method thereof, in particular to a nanometer titanium dioxide sol with a nanocrystalline structure and a preparation method thereof. Background technique: [0002] The existing nano titanium dioxide sol and its preparation method and application mainly include the following: [0003] 1. Nano-scale titanium oxide powders with specific crystal forms are prepared by chemical or physical methods, and are applied to industrial products such as glass, ceramics, plastics, etc. by high-temperature sintering; [0004] 2. The nanocrystalline structure of titanium dioxide is directly fixed and sintered on a specific metal material by an electrochemical method, and then a film of a specific crystal type is generated through temperature control; [0005] 3. The sol containing organic solvent is made by chemical method. In this method, nano-titanium oxide powder is mostly used as the material, a...

Claims

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Application Information

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IPC IPC(8): C01G23/047
Inventor 辛华鹏
Owner 辛华鹏
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