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Preparation method of nano compound film for photochemical catalyst

A nano-composite and photocatalytic technology, applied in chemical instruments and methods, catalysts for physical/chemical processes, paints containing biocides, etc. The effect of improving dispersion and improving photocatalytic activity

Inactive Publication Date: 2009-01-07
HEYUAN POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Preparation of nano-composite photocatalytic film: At present, it is more common to add appropriate amount of water and additives to nano-substances, shake and grind to disperse the agglomerated nano-substances into a uniform slurry, and then add them to the coating, so that The prepared coatings are often unevenly dispersed with nano-materials, which not only increases the cost, but also sometimes makes it difficult to achieve the desired effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Slowly add 6.65mL tetraethyl orthosilicate to 24.55mL absolute ethanol to make solution A; mix 24.55mL absolute ethanol, 7.2mL water and 0.25mL hydrochloric acid to make solution B; Under stirring, slowly add to the already prepared B, stir vigorously, and reflux at 80°C for 2 hours to obtain SiO 2 Sol. Mix 23.18mL tetrabutyl titanate, 24.55mL absolute ethanol and 2.3mL glacial acetic acid to form solution C; under magnetic stirring, mix solution C and prepared SiO 2 The sol was slowly added dropwise to a three-necked flask containing 0.25mL hydrochloric acid and 24.55mL absolute ethanol, and the rate of addition of the two was controlled so that the two were added almost simultaneously, and stirred for 4 hours to obtain TiO 2 / SiO 2 Sol; the obtained product is aged at room temperature to complete the sol-gel transition, dried under reduced pressure at 65°C, ground in a mortar, and roasted at 600°C, which is the target product of the present invention, nano-TiO 2 / S...

Embodiment 2

[0019] Slowly add 6.65mL tetraethyl orthosilicate to 32.75mL absolute ethanol to make solution A; mix 32.75mL absolute ethanol, 9.6mL water and 0.34mL hydrochloric acid to make solution B; Under stirring, slowly add to the already prepared B, stir vigorously, and reflux at 80°C for 2 hours to obtain SiO 2 sol; mix 34.76mL tetrabutyl titanate, 32.75mL absolute ethanol and 3.45mL glacial acetic acid to form solution C; under magnetic stirring, mix solution C and prepared SiO 2 The sol was slowly added dropwise to a three-necked flask containing 0.34mL of hydrochloric acid and 32.75mL of absolute ethanol, and the rate of addition of the two was controlled so that the two were added dropwise almost simultaneously, and stirred for 4 hours to obtain TiO 2 / SiO 2 Sol; the obtained product is aged at room temperature to complete the sol-gel transition, dried under reduced pressure at 65°C, ground in a mortar, and roasted at 600°C, which is the target product of the present invention,...

Embodiment 3

[0021] Slowly add 6.65mL of tetraethyl orthosilicate to 40.92mL of absolute ethanol to make solution A; mix 40.92mL of absolute ethanol, 12mL of water and 0.43mL of hydrochloric acid to make solution B; Slowly add it into the prepared B, stir vigorously, and reflux at 80°C for 2 hours to obtain SiO 2 sol; mix 46.35mL tetrabutyl titanate, 40.92mL absolute ethanol and 4.6mL glacial acetic acid to form solution C; under magnetic stirring, mix solution C and prepared SiO 2 The sol was slowly added dropwise to a three-necked flask containing 0.43mL hydrochloric acid and 40.92mL absolute ethanol, and the rate of addition of the two was controlled so that the two were added dropwise almost simultaneously, and stirred for 4 hours to obtain TiO 2 / SiO 2 Sol; the obtained product is aged at room temperature to complete the sol-gel transition, dried under reduced pressure at 65°C, ground in a mortar, and roasted at 600°C, which is the target product of the present invention, nano-TiO 2...

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PUM

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Abstract

The invention relates to a method which is used for preparing a coating with high photocatalytic activity by adding the compound of nanometer titanium dioxide and silicon dioxide into the coating. The method comprises the following steps: after the combination, TiO2 sol and SiO2 sol gelate under the normal temperature through the sol-gel method; a nanometer compound substance with better photocatalytic activity is obtained through high temperature treatment; the prepared nanometer compound substance is added into the coating; through the dispersion of a milling machine and the dispersion of supersonic waves, the self-cleaning coating with high photocatalytic activity is prepared. The method has the technical proposal that nanometer photocatalytic materials are added into the coating formula; a unique dispersion technique is applied in the production process of the coating; the technique is widely applied to the aspects such as automotive coatings, interior and exterior wall coatings, hospital operating-table coatings, household appliance coatings, etc.

Description

technical field [0001] The invention relates to a method for synthesizing nano-titanium-silicon active particles and a photocatalytic nanocomposite film, and belongs to the field of photocatalytic nanocomposite film preparation. Background technique [0002] In 1972, Fujishim et al. discovered TiO 2 The redox reaction of water can occur on the surface, thus starting the research of photocatalytic reaction. Practice has proved that for some highly toxic and biodegradable organic pollutants, using TiO 2 The photogenerated strong oxidizing property can completely oxidize organic pollutants to H at room temperature and pressure. 2 O.CO 2 Wait for small molecules. TiO 2 It can not only treat a variety of organic pollutants, but also has a good effect on sterilization and inhibition of virus activity, and has a good effect on the removal of gaseous pollutants. It has the advantages of no pollution, high efficiency, mild reaction conditions, and wide application range. Theref...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J21/08C09D167/08C09D5/14
Inventor 刘安华付文
Owner HEYUAN POLYTECHNIC
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