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Environment-friendly coating with visible light catalytic function and preparation method thereof

An environmentally friendly coating and visible light technology, which is applied in the field of architectural decoration coatings, can solve the problems of losing control of air pollution, photocatalyst deactivation, and low light utilization rate, and achieve a wide range of visible light response frequencies, high light conversion efficiency, and improved efficiency. effect of ability

Inactive Publication Date: 2018-03-20
周开珍
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practice, there are still some problems in the application of ordinary photocatalysts in this field: first, the morphology of these nanoparticles is basically spherical or ellipsoidal, and even after sufficient ultrasonic dispersion, there are still serious agglomeration phenomena among the particles. It is also not easy to disperse in organic solvents, which affects its storage stability
Secondly, the current technology simply adds photocatalysts to paint products, which can easily cause deactivation of photocatalysts, thus losing the ability to control air pollution
Again, not all photocatalysts can be used in coatings, such as TiO 2 Although photocatalyst is one of the more popular raw materials for research, it still has a wide band gap and low quantum efficiency. After several times of use, the photocatalytic activity is low; the recombination rate of electrons and holes is high, and the utilization rate of visible light is low. and other limitations

Method used

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  • Environment-friendly coating with visible light catalytic function and preparation method thereof
  • Environment-friendly coating with visible light catalytic function and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] In this example, an environmentally friendly coating with visible light catalytic function is prepared through the following steps:

[0031] 1. Preparation of nano-Bi 2 wxya 7

[0032] (1) Weigh soluble zinc salt and soluble bismuth salt and add them into deionized water so that the molar ratio of zinc ions and bismuth ions is 1:2, stir and dissolve to obtain solution A;

[0033] (2) Weigh tungstate M 2 WO 4 2H 2 O is added to deionized water, wherein M is an alkali metal element; stirring and dissolving to obtain M 2 WO 4 solution, to M 2 WO 4 Add isobutanol in the solution, the addition of isobutanol is every 1mmolM 2 WO 4 2H 2 O was added to 8mL, and stirred evenly to obtain solution B;

[0034] (3) Slowly add solution A to solution B and stir evenly so that the mol ratio of zinc ions, bismuth ions and tungsten ions is 1:2:1, then add sodium hydroxide solution to adjust the pH value of solution B to 8.5, to obtain Mixture C, transfer the mixture C to a h...

Embodiment 2

[0043] 1. Preparation of nano-Bi 2 wxya 7

[0044] (1) Weigh soluble zinc salt and soluble bismuth salt and add them into deionized water so that the molar ratio of zinc ions and bismuth ions is 1:2, stir and dissolve to obtain solution A;

[0045] (2) Weigh tungstate M 2 WO 4 2H 2 O is added to deionized water, wherein M is an alkali metal element; stirring and dissolving to obtain M 2 WO 4 solution, to M 2 WO 4 Add isobutanol in the solution, the addition of isobutanol is every 1mmolM 2 WO 4 2H 2 Add 10mL of O and stir evenly to obtain solution B;

[0046] (3) Slowly add solution A to solution B and stir evenly so that the mol ratio of zinc ions, bismuth ions and tungsten ions is 1:2:1, then add sodium hydroxide solution to adjust the pH value of solution B to 8.8, to obtain Mixture C, transfer the mixture C to a hydrothermal reactor and seal it, and react at 195°C for 16h;

[0047] (4) After the reaction kettle is naturally cooled, the product in the reaction k...

Embodiment 3

[0055] 1. Preparation of nano-Bi 2 wxya 7

[0056] (1) Weigh soluble zinc salt and soluble bismuth salt and add them into deionized water so that the molar ratio of zinc ions and bismuth ions is 1:2, stir and dissolve to obtain solution A;

[0057] (2) Weigh tungstate M 2 WO 4 2H 2 O is added to deionized water, wherein M is an alkali metal element; stirring and dissolving to obtain M 2 WO 4 solution, to M 2 WO 4 Add isobutanol in the solution, the addition of isobutanol is every 1mmolM 2 WO 4 2H 2 O was added to 12mL and stirred evenly to obtain solution B;

[0058] (3) Slowly add solution A to solution B and stir evenly so that the mol ratio of zinc ions, bismuth ions and tungsten ions is 1:2:1, then add sodium hydroxide solution to adjust the pH value of solution B to 9.0, to obtain Mixture C, transfer the mixture C to a hydrothermal reactor and seal it, and react at 200°C for 12h;

[0059] (4) After the reaction kettle is naturally cooled, the product in the r...

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Abstract

The invention provides environment-friendly coating with a visible light catalytic function and a preparation method thereof and belongs to the technical field of coating used for architectural decoration. The environment-friendly coating is prepared from the following raw materials in percentage by weight: 30-45% of organic silicon-modified acrylic emulsion, 20-30% of modified alkyd resin, 3-6% of a hyperdispersant, 0.2-0.5% of a defoaming agent, 0.5-3% of an antifreezing agent, 0.5-1.2% of a coalescing agent, 2-5% of pigment, 4-8% of calcium carbonate, 8-15% of photocatalyst size and 6-12% of zeolite powder, wherein the photocatalyst size is formed by mixing nano Bi2ZnWO7, nano SnO2 and ethyl alcohol. The coating provided by the invention is good in stability, difficult to agglomerate orcake and good in construction performance, has good photocatalytic activity under the irradiation of indoor natural lights or sunlight after being coated on the surface of a building and has functions of resisting to bacteria, sterilizing and degrading organic pollutants in the air.

Description

【Technical field】 [0001] The invention relates to the technical field of coatings for architectural decoration, in particular to an environmentally friendly coating with a visible light catalytic function and a preparation method thereof. 【Background technique】 [0002] Air pollution includes outdoor air pollution and indoor air pollution. Formaldehyde and benzene series in indoor air are far more harmful to human health than outdoors. Formaldehyde and benzene series are world-recognized potential carcinogens and It is a strong carcinogen, and together with other volatile organic compounds, it can cause respiratory system, blood system and nervous system diseases, and can also cause fetal malformation. According to statistics from the Chinese Center for Disease Control and Prevention and Chinese epidemiological statistics, more than 90% of newly renovated houses exceed the standard of formaldehyde, 90% of children with leukemia, 70% of infertility patients, and 40% of new ca...

Claims

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Application Information

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IPC IPC(8): C09D133/00C09D167/08C09D5/14B01J23/31B01J31/34C01G41/00B82Y40/00
CPCC09D133/00C09D167/08B82Y40/00C01G41/006C09D5/14B01J23/002B01J23/31B01J31/34C01P2004/64C01P2004/62B01J2523/00C08K2201/011C08K2003/2231B01J35/39B01J2523/27B01J2523/43B01J2523/54B01J2523/69C08L67/08C08K13/06C08K9/12C08K3/24C08K3/22C08L33/00Y02A50/20
Inventor 周开珍
Owner 周开珍
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