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High-efficiency white-light catalyzed indoor air purifying agent and preparation method thereof

An air purifier, indoor air technology, applied in the field of nanophotocatalysis and air purification research, can solve indoor air pollution and other problems, and achieve the effect of strong photocatalytic activity, obvious inheritance, and few intermediate processes

Inactive Publication Date: 2016-12-07
HENAN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a preparation method of titanium dioxide nanocomposite photocatalyst, which can efficiently solve the problem of indoor air pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 5g of commercially available nano-titanium dioxide (titanium dioxide), particle size 15-50nm, into a mixed solution of 70ml of water and absolute ethanol (2:5 by volume) and stir under ultrasonic conditions for 1h to prepare titanium oxide sol, then add 0.5ml Ammonia water, 0.4g ferric nitrate nonahydrate, 0.2g urea, continue ultrasonic stirring for 6h to obtain mixture A; then pour A into a 100ml stainless steel hydrothermal kettle, heat up to 180°C in a constant temperature drying oven at a rate of 3°C / min 12h, then the product was centrifuged, washed three times with deionized water, and washed three times with absolute ethanol, and the obtained product was dried in a drying oven at 80°C for 5h to obtain an ion-co-doped titanium oxide precursor B; finally B was hydrogenated in a hydrogen atmosphere furnace at 500 °C for 3 h to obtain a composite photocatalyst.

[0022] Using a 500W xenon lamp as a simulated sunlight light source, adjust the intensity to AM1.5 wit...

Embodiment 2

[0024] 5g of titanium dioxide nanowires prepared by the research group, with a diameter of about 10nm, was added to a mixed solution of 70ml of water and absolute ethanol (volume ratio 2:5) and stirred under ultrasonic conditions for 1h to prepare a titanium oxide sol, and then 0.5ml of ammonia water, 0.4 g ferric nitrate nonahydrate, 0.2g urea, and continue ultrasonic stirring for 6h to obtain mixture A; then pour A into a 100ml stainless steel hydrothermal kettle, heat up to 180°C in a constant temperature drying oven at a speed of 3°C / min and keep it for 12h, then Centrifuge the product, wash it three times with deionized water and three times with absolute ethanol, and dry the product in a drying oven at 80°C for 5 hours to obtain an ion-co-doped titanium oxide precursor B; Hydrogenation was carried out at 500° C. for 3 h in an atmosphere furnace to obtain a composite titania nanowire photocatalyst.

[0025] Using a 500W xenon lamp as a simulated sunlight light source, adj...

Embodiment 3

[0027] Add 5g of titanium dioxide nanowires prepared by the research group, with a diameter of about 10nm, into a mixed solution of 70ml of water and absolute ethanol (volume ratio 2:5) and stir under ultrasonic conditions for 1h to prepare a titanium oxide sol, then add 0.5ml of ammonia water, 0.2 g ferric nitrate nonahydrate, 0.15g nickel nitrate hexahydrate and 0.3g thiourea, continue ultrasonic stirring for 5h to obtain mixture A; then pour A into a 100ml stainless steel hydrothermal kettle, and place in a constant temperature drying oven at a speed of 3°C / min Raise the temperature to 180°C for 12 hours, then centrifuge the product, wash three times with deionized water and three times with absolute ethanol, and dry the obtained product in a drying oven at 80°C for 5 hours to obtain an ion-co-doped titanium oxide precursor Body B; finally, B was hydrogenated in a hydrogen atmosphere furnace at 500°C for 3h to obtain a composite titania nanowire photocatalyst.

[0028] With...

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PUM

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Abstract

The invention discloses a high-efficiency white-light catalyzed indoor air purifying agent and a preparation method of the high-efficiency white-light catalyzed indoor air purifying agent. A white-light catalyst refers to composite titanium dioxide nanoparticles which are doped with metals and nonmetals of which the surfaces are hydrogenated. The preparation method of the composite titanium dioxide nanoparticles is two-step synthesis of a hydrothermal method and a surface hydrogenation method. According to the invention, two modified methods of ion doping and surface hydrogenation are combined, and play a synergistic effect to regulate the band gap of titanium dioxide, so that an ultraviolet region and a visible region of the light catalyst both have stronger photocatalytic activities, and obvious purifying effects for indoor air under the irradiation of a fluorescent lamp. The air purifying agent prepared by the invention has the characteristics of low cost, strong process controllability, easy industrial production and the like.

Description

technical field [0001] The invention belongs to the research field of nanometer photocatalysis and air purification, and in particular relates to a preparation method of titanium dioxide nanometer composite photocatalyst. Background technique [0002] 70%~90% of people's life is spent indoors, but with the improvement of people's living standards and the diversification of interior decoration materials, indoor air pollution is also intensified. The health effects of the indoor environment fall into two main categories: one is called Bad Building Syndrome (SBS for short), and the other is called Bad Building Syndrome (BRI for short). Bad Building Syndrome (SBS) refers to symptoms that can occur when living and working in buildings. The main symptoms are: inattention, depression, lethargy, fatigue, headache, troublesome smell, easy to catch a cold, chest tightness, mucous membrane, skin, eye irritation, etc. Once you leave this environment, the symptoms will naturally reduce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J23/755B01J21/06B01D53/86B01D53/72
CPCB01D53/8668B01J21/063B01J23/745B01J23/755B01D2255/20707B01D2255/802B01D2259/4508B01D2258/06B01J35/39
Inventor 刘世凯张镇峰刘鑫鑫李邓阳王齐刘鑫
Owner HENAN UNIVERSITY OF TECHNOLOGY
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