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Photocatalyst suitable for dark light indoor air purification

A technology of indoor air and photocatalyst, applied in the field of photocatalyst, can solve the problems of discounted sterilization effect and no reports, etc., and achieve the effect of improving efficiency, good sterilization, and good synergistic effect

Active Publication Date: 2020-06-23
北京赛夫依特生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the bactericidal effect of the peptide dioxide ion in the photocatalyst must rely on the absorption of photons, and whether the light source absorbs enough will directly affect the bactericidal effect of the photocatalyst, so the traditional photocatalyst is used in the basement and underground when the light is weak. Garage, or indoor environment with poor light transmission, the bactericidal effect will be greatly reduced
[0004] China Invention Patent Application No. 201811229067.7 discloses a high-efficiency bactericidal photocatalyst material for indoor air purification and its preparation method. Using titanium alkoxide as raw material, nitrogen-doped nano-titanium dioxide particles are prepared by sol-gel method, and then coated with a Layer dense antibacterial film, and finally form a layer of silica gel film on the surface to obtain a sterilizing photocatalyst material with a shell-core structure; Chinese invention patent application number 201811424111.X discloses a modified photocatalyst material and preparation method for indoor air purification. These two kinds of technical solutions all have efficient bactericidal function, yet, all do not all report under the environment of weak light, the bactericidal of described photocatalyst, remove formaldehyde and anti-mildew effect

Method used

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  • Photocatalyst suitable for dark light indoor air purification
  • Photocatalyst suitable for dark light indoor air purification
  • Photocatalyst suitable for dark light indoor air purification

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0027] The preparation method of modified titanium dioxide particle 1 comprises the steps:

[0028] S1. Add 1mmol of vinyl cage silsesquioxane, 25ml of acetic acid and 0.003mmol of concentrated sulfuric acid to 50ml of chloroform, then raise the temperature to 60°C, then add 30ml of hydrogen peroxide to it, reflux for 12h, and then use dichloro Methane extraction, organic phase vacuum distillation, to obtain intermediate products;

[0029] S2. Dissolve the intermediate product in 20ml of THF, then add 8mmol of titanium dioxide particles, and 1ml of 30wt% NaOH solution, react at 30°C for 4h, then add 3ml of concentrated hydrochloric acid to quench the reaction, then add 300ml of water to stir, filter and The filter residue was collected and dried in vacuo to obtain the product, yield = 82%.

preparation example 2

[0031] The preparation method of modified titanium dioxide particle 2 comprises the steps:

[0032] S1. Add 1mmol of methacryl cage silsesquioxane, 25ml of acetic acid and 0.003mmol of concentrated sulfuric acid to 50ml of chloroform, then raise the temperature to 80°C, then add 30ml of hydrogen peroxide to it, reflux for 24h, and then Extracted with dichloromethane, and the organic phase was distilled under reduced pressure to obtain an intermediate product;

[0033] S2. Dissolve the intermediate product in 25ml of THF, then add 9mmol of titanium dioxide particles, and 1.3ml of 30wt% NaOH solution, react at 50°C for 8h, then add 3ml of concentrated hydrochloric acid to quench the reaction, then add 300ml of water and stir, filter The filter residue was collected and dried in vacuo to obtain the product with a yield of 82%.

preparation example 3

[0035] S1. Add 1mmol of vinyl cage silsesquioxane, 25ml of acetic acid and 0.003mmol of concentrated sulfuric acid to 50ml of chloroform, then raise the temperature to 50°C, then add 32ml of hydrogen peroxide to it, reflux for 18h, and then use dichloro Methane extraction, organic phase vacuum distillation, to obtain intermediate products;

[0036] S2. Dissolve the intermediate product in 20ml of THF, then add 10mmol of titanium dioxide particles, and 0.8ml of 30wt% NaOH solution, react at 30°C for 6h, then add 3ml of concentrated hydrochloric acid to quench the reaction, then add 280ml of water and stir, filter The filter residue was collected and dried in vacuo to obtain the product with a yield of 78%.

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Abstract

The present invention relates to a photocatalyst suitable for dark light indoor air purification, comprising the following components: modified titanium dioxide microparticles, and quantum dots, wherein the titanium dioxide microparticles are alkenyl polyhedral oligomeric silsesquioxane grafted titanium dioxide microparticles. According to the invention, the alkenyl polyhedral oligomeric silsesquioxane grafted titanium dioxide particles are physically blended with quantum dots, are doped into a photocatalyst formula, have a good synergistic effect, and can effectively improve the efficiency ofabsorbing solar energy by the titanium dioxide particles in the photocatalyst, so that the solar energy utilization efficiency of the photocatalyst is improved, and the photocatalyst has good sterilization, formaldehyde removal and mildew prevention effects even in a room with insufficient light.

Description

technical field [0001] The invention relates to a photocatalyst, in particular to a photocatalyst suitable for indoor air purification in dark light. Background technique [0002] Photocatalyst is a general term for a photo-semiconductor material with photocatalytic function represented by nano-scale titanium dioxide. It is coated on the surface of the substrate and has a strong catalytic degradation function under the action of ultraviolet light and visible light: it can effectively degrade air. Toxic and harmful gases; can effectively kill a variety of bacteria, and can decompose and harmless the toxins released by bacteria or fungi; at the same time, it also has the functions of removing formaldehyde, deodorizing, anti-pollution, and purifying air. [0003] Generally speaking, photocatalyst has good bactericidal effect and can be used as a common bactericidal ingredient. However, because the bactericidal effect of the peptide dioxide ion in the photocatalyst must rely on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J27/04B01J27/057B01J27/14B01J31/02B01J31/38B01J35/00A61L9/18B01D53/86B01D53/72
CPCB01J31/38B01J31/0274B01J21/063B01J27/0573B01J27/04B01J27/14A61L9/18B01D53/8668B01D2255/802B01J35/19B01J35/39Y02A50/20
Inventor 贾志宇马旭腾
Owner 北京赛夫依特生物科技有限公司
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