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TiO2 photocatalysis coating for degrading formaldehyde gas and preparation method thereof

A formaldehyde gas, photocatalytic technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of increasing the recombination probability of photogenerated holes h+vb, reducing the photocatalytic ability, reducing the photocatalytic effect, etc., to improve the product. Market competitiveness, good economic benefits, the effect of enhancing the response

Active Publication Date: 2014-06-04
QINGDAO REALEADER ADVANCED MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Various methods are currently used to treat TiO 2 Doping modification has been carried out to degrade indoor formaldehyde, and some results have been achieved. But there are still deficiencies: (1) Ag-doped TiO 2 Since AgNO 3 It is a photosensitive material, which is easily interfered by the light source during the preparation process and reduces the photocatalytic ability; (2) S-doped TiO 2 S to S 6+ and S 2- form, reducing the photocatalytic ability; (3) Cl-doped TiO 2 The Cl mainly appears in the form of Cl-, which increases the recombination probability with the photogenerated hole h+vb and reduces the photocatalytic effect.

Method used

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  • TiO2 photocatalysis coating for degrading formaldehyde gas and preparation method thereof
  • TiO2 photocatalysis coating for degrading formaldehyde gas and preparation method thereof
  • TiO2 photocatalysis coating for degrading formaldehyde gas and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Press V(Ti(C 4 h 9 O) 4): V(C 2 h 5 OH)=1:4 ratio of raw materials. Butyl titanate Ti(C 4 h 9 O) 4 Add dropwise to 3 / 4 of the amount of absolute ethanol C with vigorous stirring 2 h 5 OH, after stirring for 45min, a uniform transparent solution was obtained, and then dissolved Cu(NO 3 ) 2 ·3H 2 O and La(NO 3 ) 3 ·6H 2 O(Cu-La / TiO 2 The total molar percentage of Cu-La is 1%, the dilute hydrochloric acid solution (pH=4.5) of Cu and La molar ratio 3:1) is slowly added to the above solution under vigorous stirring, and the remaining 1 / 4 The amount of anhydrous ethanol is slowly added dropwise, after 10 minutes of dripping, vigorously stirred for 30 minutes, the obtained liquid sol is formed in the room for 5 days to form a xerogel, after suction filtration and washing, dry at 80°C for 10 hours in a blast drying oven, take it out and put it away Naturally cool and grind indoors, then put the sample into a medium-temperature experimental furnace and raise it ...

Embodiment 2

[0037] Press V(Ti(C 4 h 9 O) 4 ): V(C 2 h 5 OH)=1:4 ratio of raw materials. Butyl titanate Ti(C 4 h 9 O) 4 Add dropwise to 3 / 4 of the amount of absolute ethanol C with vigorous stirring 2 h 5 OH, after stirring for 45min, a uniform transparent solution was obtained, and then dissolved Cu(NO 3 ) 2 ·3H 2 O and La(NO 3 ) 3 ·6H 2 O(Cu-La / TiO 2 The total molar percentage of Cu-La is 1%, the dilute hydrochloric acid solution (pH=4.5) of Cu and La molar ratio 2:1) is slowly added to the above solution under vigorous stirring, vigorously stirred for 30min, and then the remaining 1 / 4 The amount of anhydrous ethanol is slowly added dropwise, after 10 minutes of dripping, vigorously stirred for 30 minutes, the obtained liquid sol is formed in the room for 5 days to form a xerogel, after suction filtration and washing, dry at 80°C for 10 hours in a blast drying oven, take it out and put it away Naturally cool and grind indoors, then put the sample into a medium-temperatur...

Embodiment 3

[0040] Press V(Ti(C 4 h 9 O) 4 ): V(C 2 h 5 OH)=1:4 ratio of raw materials. Butyl titanate Ti(C 4 h 9 O) 4 Add dropwise to 3 / 4 of the amount of absolute ethanol C with vigorous stirring 2 h 5 OH, after stirring for 45min, a uniform transparent solution was obtained, and then dissolved Cu(NO 3 ) 2 ·3H 2 O and La(NO 3 ) 3 ·6H 2 O(Cu-La / TiO 2 The total molar percentage of Cu-La is 1%, the dilute hydrochloric acid solution (pH=4.5) of Cu and La molar ratio 1:1) is slowly added to the above solution under vigorous stirring, vigorously stirred for 30min, and then the remaining 1 / 4 The amount of anhydrous ethanol is slowly added dropwise, after 10 minutes of dripping, vigorously stirred for 30 minutes, the obtained liquid sol is formed in the room for 5 days to form a xerogel, after suction filtration and washing, dry at 80°C for 10 hours in a blast drying oven, take it out and put it away Naturally cool and grind indoors, then put the sample into a medium-temperatur...

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Abstract

The invention discloses a TiO2 photocatalysis coating for degrading formaldehyde gas and a preparation method thereof and belongs to the technical field of photocatalysis coatings. The coating comprises a photocatalysis filler, a film-forming substance, a dispersing agent, a stabilizer, a wetting agent, a mildew preventive, an antifoaming agent and a thickening agent, wherein the photocatalysis filler is Cu-La / TiO2 and has the particle size of 110-150nm. The preparation method of the TiO2 photocatalysis coating comprises the following two steps: (1) preparing a Cu-La / TiO2 photocatalysis filler; (2) preparing the photocatalysis coating. The photocatalysis coating can degrade the formaldehyde gas through photocatalysis under a visible light source, the increasingly serious indoor formaldehyde pollution problem is solved, the conventional common indoor decorative coatings are replaced due to good performance, and the TiO2 photocatalysis coating is low in cost and high in safety and accords with the development tendency of national green ecological building materials.

Description

technical field [0001] The invention belongs to the field of photocatalytic coatings, in particular to a TiO used for degrading formaldehyde gas 2 Photocatalytic coating and preparation method thereof. Background technique [0002] As the largest country in the production of wood-based panels, my country's wood-based panel production has exceeded 200 million m in 2011 3 . The use of a large number of wood-based panels and wood-based panel products corresponds to the poor indoor air quality in my country. Indoor air quality is very important to human health. Poor indoor air quality can cause various discomforts and diseases such as eye, nose or throat irritation, headache, fatigue, irritability, and nausea. If people are exposed to certain toxic indoor pollutants for a long time, organs such as breathing and nerves will be damaged, and severe cases will cause cancer or even death threats. Among them, the impact of formaldehyde released from wood-based panels on indoor air...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D7/12
Inventor 张浩吴胜华朱庆明刘秀玉
Owner QINGDAO REALEADER ADVANCED MATERIALS TECH
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