Photocatalyst air purifier as well as preparation method and application thereof

A technology of air purifier and photocatalyst, which is applied in the field of air purification, can solve the problems of increased diameter and reduced photocatalytic activity, and achieve the effects of strong excitation, high photocatalytic activity, and high photocatalytic activity

Inactive Publication Date: 2018-11-23
GUANGZHOU CHANGYU CHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these nano-titanium dioxide photocatalysts can ensure the photocatalytic efficacy in the visible light range after being doped with other active catalytic elements, their photocatalytic activity is affected and reduced due to the increase in diameter after nano-titanium dioxide doping.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A preparation method of a photocatalyst air purifier, specifically comprising the following steps:

[0026] (1) adding ethyl titanate into the acetic acid solvent so that the concentration of ethyl titanate is 5 mol / L, stirring at 50° C. for 15 hours to obtain a clear solution;

[0027] (2) Transfer the clear solution in step (1) to a polytetrafluoroethylene autoclave, heat up to 120° C., and react for 36 hours to obtain a white precipitate;

[0028] (3) washing the white precipitate in step (2) with ethanol, and then drying at 50°C to obtain water-soluble titanium dioxide ultrafine nanopowder;

[0029] (4) 15.02 parts by weight of water-soluble titanium dioxide ultrafine nanopowder and 6.29 parts by weight of nano-silver, 0.05 parts by weight of sodium silicate, 0.02 parts by weight of sodium dodecylbenzenesulfonate and 78.62 parts by weight of deionized water are added to ultrasonic dispersion Ultrasonic dispersion in the equipment for 20 minutes, then added to the s...

Embodiment 2

[0032] A preparation method of a photocatalyst air purifier, specifically comprising the following steps:

[0033] (1) adding tetra-n-butyl titanate into a benzoic acid solvent so that the concentration of tetra-n-butyl titanate is 6 mol / L, stirring at 35° C. for 20 hours to obtain a clear solution;

[0034] (2) Transfer the clear solution in step (1) to a polytetrafluoroethylene autoclave, heat up to 110° C., and react for 30 hours to obtain a white precipitate;

[0035] (3) washing the white precipitate in step (2) with ethanol, and then drying at 50°C to obtain water-soluble titanium dioxide ultrafine nanopowder;

[0036] (4) Add 18.25 parts by weight of water-soluble titanium dioxide ultrafine nanopowder and 5.16 parts by weight of nano silver, 0.06 parts by weight of polyvinyl alcohol, 0.03 parts by weight of sodium polyphosphate and 76.5 parts by weight of deionized water into ultrasonic dispersion equipment for ultrasonic dispersion 15min, and then added to a stirring ...

Embodiment 3

[0039] A preparation method of a photocatalyst air purifier, specifically comprising the following steps:

[0040] (1) adding titanium tetrachloride to the oxalic acid solvent so that the concentration of titanium tetrachloride is 8 mol / L, stirring at 35° C. for 12 hours to obtain a clear solution;

[0041] (2) Transfer the clear solution in step (1) to a polytetrafluoroethylene autoclave, heat up to 150° C., and react for 28 hours to obtain a white precipitate;

[0042] (3) washing the white precipitate in step (2) with ethanol, and then drying at 50°C to obtain water-soluble titanium dioxide ultrafine nanopowder;

[0043](4) Add 16.47 parts by weight of water-soluble titanium dioxide ultrafine nanopowder, 5.36 parts by weight of nano-silver, 0.05 parts by weight of carboxymethyl cellulose, 0.01 parts by weight of polyacrylamide and 78.11 parts by weight of deionized water into ultrasonic dispersion equipment Disperse for 25 minutes, then add it to a stirring device and stir...

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PUM

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Abstract

The invention belongs to the technical field of air purification, and particularly relates to a photocatlayst air purifier as well as a preparation method and application thereof. The preparation method comprises the following steps: stirring an organic titanium compound and an organic acid compound at a low temperature, heating reacting in a reaction kettle, finally washing and drying by using ethanol, performing the on-step reaction, thus obtaining the water-soluble titanium dioxide ultrafine nano powder grafted with organic acid; and ultrasonically dispersing the obtained water-soluble titanium dioxide ultrafine nano powder, nano silver, adhesive, a dispersing agent and deionized water in an ultrasonic dispersion device, thus obtaining the photocatalyst air purifier. An average particlesize of the obtained photocatalyst reaches 4nm, the photocatalytic activity is high, and harmful gases such as formaldehyde, benzene, TVOC can be effectively removed; and moreover, by virtue of the visible light of 400nm or more, the catalytic effect can also be stimulated. The preparation method provided by the invention is simple in process and easy for industrialized production.

Description

technical field [0001] The invention belongs to the technical field of air purification, and in particular relates to a photocatalyst air purifier and its preparation method and application. Background technique [0002] With the continuous improvement of people's health awareness, people's requirements for the living environment are getting higher and higher, especially the living environment. After the living environment is decorated or after the purchase of new furniture, it is easy to emit harmful gases such as formaldehyde, benzene, TVOC, etc., which directly endanger human health. Therefore, various air purification products have been developed and utilized. [0003] 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 under the action of ultraviolet light and visible light, it has a strong catalytic degradation function and can effec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/38B01J23/50B01D53/86B01D53/72
CPCB01D53/8668B01D53/8687B01D2255/20707B01D2255/802B01D2257/7027B01D2257/708B01J23/50B01J31/38B01J35/004B01J35/006
Inventor 史勇
Owner GUANGZHOU CHANGYU CHEM TECH CO LTD
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