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Preparation method of environment-friendly interior wall top coating for preforming catalytic degradation on formaldehyde in air during photocatalysis and chemical oxidation

A technology of chemical oxidation and catalytic degradation, applied in the direction of coating, etc.

Inactive Publication Date: 2014-04-30
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The wavelength of natural light is usually 380nm ~ 780nm, the smaller the wavelength of light, the higher the energy, only purple light 380 ~ 440nm can make titanium dioxide play a catalytic role, most other light has no effect

Method used

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  • Preparation method of environment-friendly interior wall top coating for preforming catalytic degradation on formaldehyde in air during photocatalysis and chemical oxidation
  • Preparation method of environment-friendly interior wall top coating for preforming catalytic degradation on formaldehyde in air during photocatalysis and chemical oxidation
  • Preparation method of environment-friendly interior wall top coating for preforming catalytic degradation on formaldehyde in air during photocatalysis and chemical oxidation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Preparation of formaldehyde degradation agent

[0043] Dissolve 20g of titanium tetrachloride in 50ml of deionized water, and add ammonia water dropwise at 20°C to adjust the pH to 9-11. Settled at 20°C for 20 hours and filtered under reduced pressure. Wash the filter cake with deionized water until it does not contain chloride ions, dry it, and sieve it to obtain white titanium hydroxide powder ( ).

[0044]Dissolve 4g of ammonium molybdate in 20ml (1mol / L) of sulfuric acid, add 10g of titanium hydroxide, then add 0.4g of chromium trioxide, and stir for 4 hours. Heating and concentrating until the liquid disappears, and roasting in a box-type resistance furnace at 550°C for 3 hours to obtain a formaldehyde degradation agent. X-ray diffraction, ultraviolet diffuse reflectance, ammonia gas temperature-programmed adsorption-desorption and scanning electron microscopy were used for detection. The results are shown in figure 2 , 3 , 4 and 5.

[0045] (2) Modulatio...

Embodiment 2

[0053] Dissolve 4g of ammonium molybdate in 20ml (1mol / L) of sulfuric acid, add 10g of titanium hydroxide, then add 0.4g of manganese sulfate, and stir for 4 hours. Heat and concentrate in a box-type resistance furnace until the liquid disappears, and bake at 550°C for 3 hours to obtain a formaldehyde degradation agent. X-ray diffraction, ultraviolet diffuse reflectance and scanning electron microscopy are used for detection, the results are shown in figure 2 , 3 , 4 and 5.

[0054] Make wall paint according to the method of embodiment 1, the effect of degrading formaldehyde sees figure 1 After 3 days, the degradation rate of formaldehyde was measured to be 70.7%.

Embodiment 3

[0056] Dissolve 4g of ammonium molybdate in 20ml (1mol / L) of sulfuric acid, add 10g of titanium hydroxide, and stir for 4 hours. Heat and concentrate in a box-type resistance furnace until the liquid disappears, and bake at 550°C for 3 hours to obtain a formaldehyde degradation agent. X-ray diffraction, ultraviolet diffuse reflectance and scanning electron microscopy are used for detection, the results are shown in figure 2 , 3 , 4 and 5.

[0057] Make wall paint according to the method of embodiment 1, the effect of degrading formaldehyde sees figure 1 After 3 days, the degradation rate of formaldehyde was measured to be 40.2%.

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Abstract

The invention provides a preparation method of an environment-friendly interior wall top coating for preforming catalytic degradation on formaldehyde in air during photocatalysis and chemical oxidation. The environment-friendly interior wall top coating comprises a formaldehyde degrading agent capable of performing catalytic degradation on formaldehyde, wherein the formaldehyde degrading agent is prepared by using a precipitation method. The formaldehyde degrading agent is a titanium dioxide powder body which has a certain crystal form and contains molybdenum trioxide and other metal oxides on the surface. The environment-friendly interior wall top coating is higher in acid catalytic activity, is used in acid catalysis reaction, and is also suitable for catalytic oxidation degradation of the formaldehyde. The powder body is safe, non-volatile and pollution-free. The environment-friendly interior wall top coating provided by the invention is environment-friendly and free from pollution; the degradation rate to the formaldehyde in indoor air can reach 73.3 percent.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a preparation method of an environment-friendly wall paint which is highly efficient and environment-friendly, and photocatalyzes and chemically oxidizes simultaneously to catalyze and degrade formaldehyde in the air. Background technique [0002] Wall paint as a coating is one of the necessary materials for interior decoration. Usually wall paint is composed of adhesive, water, white filler, curing agent, antifungal agent, etc., in order to achieve the purpose of interior beautification. [0003] In addition to the functions of decoration and beautification, multifunctional wall paints have also been gradually developed. The main functions are disinfection and sterilization, absorption of ultraviolet rays, and absorption of harmful gases. [0004] Formaldehyde is an essential raw material for the production of synthetic resins, paints, man-made fibers, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D131/04C09D133/00C09D125/14C09D7/12C09D5/00
Inventor 杨大伟魏鑫王传宇吕继祥毕然
Owner DALIAN POLYTECHNIC UNIVERSITY
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