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A kind of PVC wallpaper that catalyzes degradation of formaldehyde by visible light and preparation method thereof

A catalytic degradation and visible light technology, applied in chemical instruments and methods, special paper, separation methods, etc., can solve the problems of inability to degrade organic pollutants, limited effect of degrading organic pollutants, etc., and achieve the best visible light catalytic activity, low price, The effect of good repeatability and stability

Active Publication Date: 2019-01-22
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above-mentioned problem that the existing wallpaper cannot degrade organic pollutants, or the effect of degrading organic pollutants is limited, the present invention proposes a PVC wallpaper that can catalyze the degradation of formaldehyde by visible light and a preparation method thereof. Photocatalyst N-TiO with large specific surface area 2 , so as to improve the effect of wallpaper degradation formaldehyde

Method used

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  • A kind of PVC wallpaper that catalyzes degradation of formaldehyde by visible light and preparation method thereof
  • A kind of PVC wallpaper that catalyzes degradation of formaldehyde by visible light and preparation method thereof
  • A kind of PVC wallpaper that catalyzes degradation of formaldehyde by visible light and preparation method thereof

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preparation example Construction

[0050] The invention provides a photocatalyst N-TiO 2 The preparation method, described preparation method comprises the following steps:

[0051] 1) Prepare N-TiO first 2 Sol;

[0052] 2) the N-TiO 2 Put the sol into a freeze dryer and dry it at -55°C to -40°C and 5 to 20Pa for 10 to 14 hours to form white flocculent N-TiO 2 Xerogel;

[0053] 3) the N-TiO 2 The xerogel is calcined at 200-600°C for 2-6 hours to obtain the photocatalyst N-TiO 2 Powder.

[0054] In the present invention, the N-TiO 2 The sol was freeze-dried, making the prepared photocatalytic N-TiO 2 The light absorption performance of the powder is better, the specific surface area is greatly increased, and the photocatalytic effect is improved. This is because the traditional sol-gel method is used to prepare photocatalyst titanium dioxide (TiO 2 ) process, TiO 2 The sol is generally dried by heat drying (HD) at 60-80°C to form a xerogel, and then the TiO 2 Preparation of photocatalyst TiO by calci...

Embodiment 1

[0072] (1)N-TiO 2 Sol preparation

[0073]Dissolve tetrabutyl titanate in anhydrous ethanol solution first, and mix evenly to obtain a solution A with a concentration of tetrabutyl titanate of 40%;

[0074] Then urea was poured into ultrapure water, and after completely dissolving, solution B with a urea concentration of 250 g / L was obtained. At the same time, nitric acid was added to adjust the pH value of solution B to 2.5.

[0075] Finally, according to the nitrogen / titanium molar ratio of 1:3, slowly titrate solution A into solution B at a rate of 1-2 drops per second, and keep stirring to form a white suspension; After h, light blue-gold N-TiO is formed 2 Sol; wherein, the nitrogen / titanium molar ratio is the molar ratio of the N element moles of urea in solution B to the Ti element molar ratio of tetrabutyl titanate in solution A.

[0076] (2)N-TiO 2 Preparation of Xerogel

[0077] The N-TiO 2 The sol was put into a freeze dryer and dried at -55°C and 20Pa for 14 h...

Embodiment 2

[0081] (1)N-TiO 2 Sol preparation

[0082] Dissolve tetrabutyl titanate in anhydrous ethanol solution first, and mix evenly to obtain a solution A with a concentration of tetrabutyl titanate of 60%;

[0083] Then urea was poured into ultrapure water and completely dissolved to obtain a solution B with a urea concentration of 300 g / L. At the same time, nitric acid was added to adjust the pH of the solution B to 2.0.

[0084] Finally, according to the nitrogen / titanium molar ratio of 1:2, slowly titrate solution A into solution B at a rate of 1-2 drops per second, and keep stirring to form a white suspension; After h, light blue-gold N-TiO is formed 2 Sol; wherein, the nitrogen / titanium molar ratio is the molar ratio of the N element moles of urea in solution B to the Ti element molar ratio of tetrabutyl titanate in solution A.

[0085] (2) N-TiO 2 Preparation of Xerogel

[0086] The N-TiO 2 The sol was put into a freeze dryer and dried at -40°C and 5Pa for 10h to form whi...

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Abstract

The invention discloses PVC (polyvinyl chloride) wallpaper with a function of photocatalytically degrading formaldehyde in visible light and a method for preparing the PVC wallpaper. The method includes that urea is used as a nitrogen source, tetra-n-butyl titanate is used as a titanium source, and nitrogen-doped titanium dioxide (N-TiO2) photocatalysts are prepared by the aid of sol-gel processes; PVC wallpaper is used as a carrier, the photocatalysts N-TiO2 are carried on the surface of the PVC wallpaper to prepare the photocatalytic wallpaper. The PVC wallpaper and the method have the advantages that TiO2 sol is prepared by the aid of vacuum freeze drying processes, and accordingly the N-TiO2 photocatalysts which are high in photocatalytic activity as compared with like products prepared by the aid of the traditional hot-air drying preparation processes can be obtained, are high in crystallinity and have large specific surface area; formaldehyde gas can be degraded in the visible light by the photocatalytic PVC wallpaper prepared by the aid of the method, and the photocatalytic PVC wallpaper is high in photocatalytic activity.

Description

technical field [0001] The invention relates to the field of wallpapers, in particular to a PVC wallpaper which can degrade formaldehyde by visible light catalysis and a preparation method thereof. Background technique [0002] Wallpaper is a material used to decorate interior walls. It is favored for its unique style and decorative beautification effect. So far, wallpaper has become an important interior wall decoration material just like paint. The domestic wallpaper market is constantly expanding and has a development trend of replacing paint. In foreign countries, 90% of interior decoration uses wallpaper, so domestic and foreign markets are very important. huge. [0003] Due to the release of a large amount of organic volatiles such as formaldehyde, acetaldehyde, benzene, chloroform, etc. during the decoration process, materials such as coatings, paints, wood-based panels, and adhesives, the indoor air of newly renovated buildings is seriously polluted and has a huge ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H27/20D21H21/14D21H19/14B01J27/24B01J21/06B01D53/86B01D53/88B01D53/72
CPCB01D53/8668B01D53/88B01D2255/802B01D2257/708B01D2258/06B01D2259/4508B01J21/063B01J27/24B01J35/004D21H19/14D21H21/14D21H27/20
Inventor 陈礼辉林辉黄六莲曹石林
Owner FUJIAN AGRI & FORESTRY UNIV
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