A kind of photocatalyst varnish with high-efficiency formaldehyde removal indoor

A technology of photocatalyst and varnish, applied in coating, organic compound/hydride/coordination complex catalyst, organic chemistry, etc., can solve the problems of no use value, insufficient natural light, low proportion of ultraviolet light, etc., and achieve formaldehyde degradation High efficiency, large contact surface and easy adhesion

Active Publication Date: 2017-09-29
西北永新涂料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main problems at present are: first, the pure nano-titanium dioxide photocatalyst can only absorb ultraviolet light below 400nm. In the natural environment, the proportion of ultraviolet light is relatively low, less than 10% of natural light, so the pure photocatalyst is basically useless; As a household photocatalyst, it must achieve visible light absorption; of course, it is best to absorb far-infrared light, so that it can maintain good formaldehyde degradation performance at night and in closed cabinets

Method used

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  • A kind of photocatalyst varnish with high-efficiency formaldehyde removal indoor
  • A kind of photocatalyst varnish with high-efficiency formaldehyde removal indoor
  • A kind of photocatalyst varnish with high-efficiency formaldehyde removal indoor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Embodiment 1, the first, the synthesis of four (p-mercaptophenyl) porphyrins;

[0049] (1) Synthesis of tetraphenylporphyrin: Add 0.101 mol of benzaldehyde and 250 mL of propionic acid into a round-bottomed flask, sonicate until uniform, and heat to reflux at 145 °C; add 0.101 mol of pyrrole into a 30 mL Propionic acid, add dropwise to the above solution, 20-30 min dropwise, reflux for 1 h; Rotary steam, remove about 100 mL propionic acid, add 100 mL ethanol to the bottle, place at 0°C for 12 h, suction filter, column Chromatographic separation collects tetraphenylporphyrin.

[0050] (2) Synthesis of tetrakis(p-sulfonylchloridephenyl)porphyrin: put 10 mL of chlorosulfonic acid in a round bottom flask, add 0.5 g of tetraphenylporphyrin, stir at 0°C for 5 hours, and rotate at 500r / min dropwise into a beaker containing 137 grams of ice, neutralize pH=7 with NaOH solution, remove water by rotary evaporation, dissolve the solid with absolute ethanol, filter with suction, sp...

Embodiment 2

[0057] Example 2, the synthetic method of tetrakis (p-mercaptophenyl) porphyrin is the same as that of Example 1 for preparing TiO2-Ag-mercapto porphyrin photocatalyst; accurately measure 70 mL of absolute ethanol and place it in a 500 mL beaker , at a stirring speed of 2000r / min, 30 mL of tetraethyl orthosilicate was added, and the pH value of the solution was adjusted to 2 with hydrochloric acid. After stirring for 10 min, 18 mL of distilled water was added, and the stirring was continued for 30 min to obtain silica sol.

[0058] Prepare indoor high-efficiency formaldehyde-removing photocatalyst varnish as follows: (1) Take 150 grams of distilled water, 1.4 grams of ink dispersion aid, TiO 2 -8 grams of Ag-mercaptoporphyrin photocatalyst, 40 grams of silica sol, 0.3 grams of 35% acetic acid solution; (2) Put distilled water in a high-speed disperser, and add 1.4 grams of ink wetting and dispersing agent at a stirring speed of 3000r / min , stir and disperse for 15min; adjust t...

Embodiment 3

[0059] Embodiment 3, the synthetic method of tetrakis (p-mercaptophenyl) porphyrin and preparation TiO 2 The method of -Ag-mercaptoporphyrin photocatalyst is the same as embodiment 1; Accurately measure 70 mL of dehydrated alcohol and place it in a 500 mL beaker, add 20 mL of orthosilicate ethyl ester at a stirring speed of 2000r / min, The pH value of the solution was adjusted to 1.1 with hydrochloric acid, after stirring for 10 min, 15 mL of distilled water was added, and the stirring was continued for 30 min to obtain silica sol.

[0060] Prepare indoor high-efficiency formaldehyde-removing photocatalyst varnish as follows: (1) Take 180 grams of distilled water, 2 grams of ink dispersion aids, TiO 2 - 10 grams of Ag-mercaptoporphyrin photocatalyst, 50 grams of silica sol, 0.48 grams of 35% acetic acid solution; (2) Put distilled water in a high-speed disperser, and add 2 grams of ink wetting and dispersing agent at a stirring speed of 4000r / min , stir and disperse for 18min;...

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Abstract

The invention provides indoor efficient formaldehyde removing photocatalyst varnish. The indoor efficient formaldehyde removing photocatalyst varnish is prepared from 5-10 parts of a TiO2-Ag-thiol-derivatized porphyrin photocatalyst, 100-200 parts of distilled water, 20-50 parts of silica sol, 0.1-0.5 part of 35% acetic acid and 1-2 parts of an ink wetting dispersant. A preparation method comprises the steps that the distilled water is placed into a high-speed dispersion machine, the ink wetting dispersant is added at the stirring speed of 3000-4000 r / min, and dispersion under stirring is performed for 15-20 min; the revolving speed is regulated to be 200-400 r / min, and the TiO2-Ag-thiol-derivatized porphyrin photocatalyst is added; the revolving speed is regulated to be 5000-6000 r / min, and dispersing under high-speed stirring is performed for 2-4 h; the revolving speed is regulated to be 2000-3000 r / min, silica sol is slowly added, 5 parts of 35% acetic acid is dropwise added, the revolving speed is regulated to be 5000-6000 r / min, and stirring is performed for 2-4 h; the photocatalyst varnish is prepared. The indoor efficient formaldehyde removing photocatalyst varnish can efficiently degrade formaldehyde in indoor air under the visible light condition, is wide in photoresponse range which comprises an ultraviolet light area and part of a visible light area within 600 nm or below and is an efficient product for indoor air treatment.

Description

technical field [0001] The invention belongs to the field of interior decoration materials, in particular to an indoor high-efficiency formaldehyde-removing photocatalyst varnish. Background technique [0002] With the improvement of people's living standards, the decoration industry is rising day by day, and the problem of indoor air pollution is also becoming more and more serious. Most modern people spend 80% to 90% of their time indoors every day, so indoor air pollution is more harmful to the human body. According to the survey of relevant international organizations, 2.8 million people die directly or indirectly from decoration pollution every year in the world, and 30% of the world's newly built and rebuilt buildings have indoor air pollution harmful to health. Facing the increasingly serious situation of indoor air pollution, in 2011, the National Indoor Environment and Environmental Product Quality Supervision and Inspection Center carried out the "First National I...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/00C09D5/32C09D7/12B01J31/38C07D487/22
CPCB01J31/38B01J35/004C07D487/22C09D1/00C09D5/32C09D7/65
Inventor 付燕罗志河张海银李鑫哲张安杰靳军陈丽丽曾慧崇马建泰
Owner 西北永新涂料有限公司
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