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Photocatalysis thin film with illumination and purifying coupling function and manufacture method thereof

A photocatalytic film and functional technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of high operation and maintenance costs, difficulty in popularization, low photocatalytic efficiency, etc. Excellent light conversion performance, simple preparation process, and strong coating combination

Inactive Publication Date: 2007-02-28
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there is no cost-effective treatment method for indoor pollution, and the existing titanium dioxide coatings are difficult to respond under lighting
Patents such as Chinese Patent Publication No. CN2333944 have proposed a method for degrading indoor pollution by an air purifier with functions such as negative ions-ozone-photocatalysis. universal
The existing relatively effective nitrogen doping can redshift the absorption edge of titanium oxide to about 450nm, but for ordinary white light, the photocatalytic efficiency is still not high

Method used

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  • Photocatalysis thin film with illumination and purifying coupling function and manufacture method thereof
  • Photocatalysis thin film with illumination and purifying coupling function and manufacture method thereof
  • Photocatalysis thin film with illumination and purifying coupling function and manufacture method thereof

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preparation example Construction

[0060] The preparation steps of the film proposed by the present invention are as follows:

[0061] 1) Surface pretreatment of lighting illuminant glass:

[0062] 1.1) Dust removal and degreasing of lamp tubes Since the glass lamp tubes or bulbs used for lighting are inevitably exposed to dust and grease pollution during the manufacturing, inspection, packaging and sales process, in order to improve the adhesion and aesthetics of the photocatalytic film, it must be degreased first. Cleaning of lamps. The process steps include: (1) wiping the glass lamp tube with clean absorbent cotton; (2) further cleaning with ethanol and acetone organic solvents; (3) dipping and degreasing with concentrated NaOH solution heated to 80-100°C; 4) Wash with tap water, deionized water, ethanol and acetone in sequence; (5) Dry the sample with a hair dryer for later use.

[0063] 1.2) Etching on the surface of the lamp tube: In order to improve the adhesion of the light transfer film, it is neces...

Embodiment 1

[0079] 1) Surface pretreatment of lighting illuminant glass:

[0080] Wipe the lamp tube with clean absorbent cotton to remove dust; degrease with concentrated NaOH solution heated to 80°C; clean with tap water, deionized water, ethanol and acetone in sequence; dry with a hair dryer for later use.

[0081] The illuminant glass that has been dedusted and degreased is evenly immersed in a 0.05M ammonium bifluoride solution for etching, and the immersion time is 10 minutes. Then wash with tap water, deionized water, ethanol and acetone, and dry with a hair dryer.

[0082] 2) The glass surface of the lighting illuminant is dip-coated with a light-transferring transparent film:

[0083] by SiO 2 Content is 60%, B 2 o 3 Content is 12%, K 2 O+Li 2 O content is 20%, Er 2 o 3 Content is 0.5%, Yb 2 o 3 Combining components with a content of 7.5% to prepare an up-conversion glass precursor, the steps are: prepare 3g / L alkaline silica sol; dissolve the corresponding calculated a...

Embodiment 2

[0089] 1) Surface pretreatment of lighting illuminant glass:

[0090] Wipe the illuminant glass with clean absorbent cotton to remove dust from the lamp tube; dip and degrease it several times with concentrated NaOH solution heated to 100°C; clean it with tap water, deionized water, ethanol and acetone in sequence; dry it with a hair dryer for later use. The illuminant glass that has been dedusted and degreased is uniformly immersed in 0.5M ammonium bifluoride solution for etching, and the immersion time is 0.5 minutes. Then wash with tap water, deionized water, ethanol and acetone, and dry with a hair dryer.

[0091] 2) The glass surface of the lighting illuminant is dip-coated with a light-transferring transparent film:

[0092] by SiO 2 Content is 62%, B 2 o 3 Content is 10%, K 2 O+Li 2 O content is 15%, Pu 2 o 3 Content is 3%, Yb 2 o 3 Combining components with a content of 10% to prepare an up-conversion glass precursor, the steps are: prepare 30g / L alkaline sil...

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Abstract

The invention discloses a preparing method of titanium dioxide nanometer film excited by visible light, which comprises the following steps: covering a layer of upper rotary optical transparent glass and titanium dioxide optical catalytic film with doped rare earth oxide on the external case of luminous glass; predisposing the surface of luminous glass; depositing the upper rotary optical transparent film; sedimenting nanometer titanium dioxide film; doping titanium dioxide catalytic film at original position.

Description

Technical field: [0001] A photocatalytic thin film with illumination and purification coupling functions and a preparation method thereof belong to the technical field of nanometer material preparation, and in particular relate to the preparation of titanium dioxide nano thin film excited by visible light. Background technique: [0002] For a long time, people tend to focus on the prevention and control of outdoor environmental pollution, but the research data published by WHO pointed out that: indoor environmental pollution is generally 2-5 times higher than outdoor pollution, and newly renovated houses are even hundreds of times higher. Indoor pollutants are mainly various volatile organic compounds (VOCs). Hundreds of organic compounds have been isolated from the air, some of which are carcinogens. About 90% of people's activities are carried out indoors, so avoiding the harm and erosion of indoor pollution to people's health is an urgent issue that must be solved to impr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/34C03C17/02C03C17/23B01J21/06
Inventor 凌云汉陈显彬梁祖权白新德
Owner TSINGHUA UNIV
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