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Bismuth oxyhalides photocatalytic environmental friendly coating and preparation method thereof

A technology of bismuth oxyhalide photocatalytic powder and environmental protection coating, applied in the field of photocatalytic environmental protection coating and its preparation, bismuth oxyhalide photocatalysis environmental protection coating and its preparation, can solve the problem of inability to antibacterial and sterilize and degrade toxic air pollutants, photocatalysis Problems such as low efficiency and narrow photoresponse range of photocatalytic nano-coatings achieve benefits to human health, easy availability of raw materials, low cost, and high cost performance

Inactive Publication Date: 2013-03-20
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention is a kind of bismuth oxyhalide photocatalytic environment-friendly coating and its preparation method, and its purpose is: to overcome the narrow photoresponse range of existing photocatalytic nano coating, photocatalytic efficiency is not high, can't effectively antibacterial sterilization and degradation under indoor natural light The deficiencies of toxic air pollutants; the bismuth oxyhalide BiOX (X=Cl, Br, I) photocatalytic material with better ultraviolet light or visible light absorption performance of similar crystal structure, or through its compound synergy, makes a A kind of bismuth oxyhalide photocatalytic environmental protection coating, which has the function of highly efficient and pollution-free antibacterial and sterilizing and degrading organic pollutants in the air under natural light indoors or sunlight

Method used

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  • Bismuth oxyhalides photocatalytic environmental friendly coating and preparation method thereof
  • Bismuth oxyhalides photocatalytic environmental friendly coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0026] The preparation steps of BiOCl / BiOBr photocatalytic environmental protection coating of the present invention are as follows (by mass percentage):

[0027] 1, first take bismuth oxychloride, bismuth oxybromide powder according to mass ratio as 1: 2, make it mix uniformly and form BiOCl / BiOBr photocatalytic powder, stand-by;

[0028] II. Put 3% BiOCl / BiOBr photocatalytic powder, 1.5% polyphosphate dispersant, 5% silicon acrylic emulsion and 10% water into the mixer, and stir at 400rpm for 15min to prepare BiOCl / BiOBr photocatalytic emulsion pulp, ready to use;

[0029] III. Add 7% of filler kaolin, 8% of heavy calcium carbonate, 10% of light calcium carbonate, 12% of wollastonite powder, 20.2% of special defoamer BX-85 as defoamer, and 8% of polyphosphate as dispersant Add 15% of water to the slurry prepared in step II, stir at 900rpm for 15min, then use a sand mill to grind for 20min, and set aside;

[0030]IV. Finally, mix the sample of step III with 10% of silicon-a...

Embodiment approach 2

[0032] The preparation steps of BiOCl / BiOI photocatalytic environmental protection coating of the present invention are as follows (by mass percentage):

[0033] 1, at first according to mass ratio be 1: 3 and take bismuth oxychloride, bismuth oxyiodide powder, make it mix uniformly and form BiOCl / BiOI photocatalytic powder, stand-by;

[0034] II. Put 4% of BiOCl / BiOI photocatalytic powder, 2% of polycarboxylate as dispersant, 4.5% of silicon acrylic emulsion and 11% of water into the mixer, and stir at 500rpm for 20min to prepare BiOCl / BiOI photocatalytic whey, ready to use;

[0035] III. Filler kaolin 7.5%, heavy calcium carbonate 6.5%, light calcium carbonate 11%, wollastonite powder 10%, defoamer is special defoamer BX-85 20.2%, dispersant is polycarboxylate 8.5% Add it to the slurry prepared in step II, add 14% water to the mixer, stir at 900rpm for 15min, then use a sand mill to grind for 20min, and set aside;

[0036] IV. Finally, mix the sample of step III with 8.5% ...

Embodiment approach 3

[0038] The preparation steps of BiOCl / BiOBr / BiOI photocatalytic environmental protection coating of the present invention are as follows (by mass percentage):

[0039] 1, at first according to mass ratio be 1: 1: 2 and take bismuth oxychloride, bismuth oxybromide, bismuth oxyiodide powder, make it mix uniformly and form BiOCl / BiOBr / BiOI photocatalytic powder, stand-by;

[0040] II. Put 4% of BiOCl / BiOBr / BiOI photocatalytic powder, 2.5% of polyphosphate as dispersant, 5.5% of silicon acrylic emulsion and 12% of water into a mixer, and stir at 400rpm for 15min to prepare BiOCl / BiOI photocatalyst Catalyzed emulsion, ready to use;

[0041] III. Add 10% of filler kaolin, 6% of heavy calcium carbonate, 7% of light calcium carbonate, 9% of wollastonite powder, 20.3% of special defoamer BX-85 as defoamer, and 10% of polyphosphate as dispersant Add 15% of water to the slurry prepared in step II, stir at 900rpm for 15min, then use a sand mill to grind for 20min, and set aside;

[0042...

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Abstract

The invention discloses a bismuth oxyhalides photocatalytic environmental friendly coating and a preparation method thereof, and belongs to the technical field of coating. The invention specifically relates to a photocatalytic environmental friendly coating, which has functions of high-performance and pollution-free antibacteria and sterilization and degradation of organic contaminants in air in the presence of indoor natural light or under a condition exposed to sunlight, and a preparation method thereof. The bismuth oxyhalides photocatalytic environmental friendly coating is characterized in that: the coating is adopted as an interior and external wall coating which has functions of high-performance and pollution-free antibacteria and sterilization and degradation of organic contaminants in air in the presence of indoor natural light or under a condition exposed to sunlight. The coating comprises bismuth oxyhalides photocatalytic powder, a stuffing assistant and water, wherein the bismuth oxyhalides photocatalytic powder content is 1-10% by mass of a total mass of the coating, the stuffing assistant content is 40-80% by mass of the total mass of the coating, and the balance is water. The coating can be widely applicable for interior wall surfaces and external wall surfaces of buildings, and has characteristics of high photocatalytic efficiency, good stability, solid coating combining, unlikely discoloration, low cost and simple preparation.

Description

technical field [0001] The invention discloses a bismuth oxyhalide photocatalytic environment-friendly coating and a preparation method thereof, belonging to the technical field of coatings. In particular, it relates to a photocatalytic environmental protection coating with the functions of highly efficient and non-polluting antibacterial and sterilizing and degrading organic pollutants in the air under indoor natural light or sunlight irradiation and a preparation method thereof. Background technique [0002] With the improvement of living standards, the purchase of cars, interior decoration and luxury homes has become part of people's pursuit of a comfortable life. The coatings, paints, foam fillers and other materials used in home decoration and luxury homes contain polluting gases such as formaldehyde and benzene series, and harmful gases discharged from automobile exhaust, causing indoor air pollution and outdoor air pollution, especially indoor air pollution. The form...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D133/04C09D7/12C09D5/14
Inventor 樊彩梅张小超李双志丁光月侯红串史竹青王韵芳梁镇海
Owner TAIYUAN UNIV OF TECH
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