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Porous magnesium oxychloride cement-based photocatalytic functional material and preparation method thereof

A technology of magnesium oxychloride cement and functional materials, which is applied in the direction of chemical instruments and methods, catalyst carriers, physical/chemical process catalysts, etc., can solve the problems of unfavorable material photocatalytic activity, loss of photocatalytic activity, low photocatalytic activity, etc. To achieve the effect of enriching the fine pore structure, improving photocatalytic activity and large adsorption capacity

Active Publication Date: 2013-03-27
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, reports on the composite technology of photocatalytic materials and cement-based materials indicate that cement-based materials with small porosity are mainly prepared, and photocatalysts are generally prepared by blending with cement raw materials, which not only causes a large amount of photocatalytic materials to be destroyed by cement. The hydration substance loses its photocatalytic activity, and because the photocatalytic material inside the cement matrix cannot touch the light source, the overall photocatalytic activity of the material is also low. The adsorption performance is very weak, which is not conducive to improving the photocatalytic activity of the material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Porous magnesium oxychloride cement-based photocatalytic functional material, which is prepared from light-burned magnesia, magnesium chloride, foaming agent, photocatalyst, admixture and phosphoric acid, each component is 65% activity by weight 96g of light-burned magnesium oxide, 57.6g of magnesium chloride aqueous solution with a mass fraction of 31%, 3g of animal protein foaming agent, photocatalyst (TiO 2 Powder, Degussa P25, rutile / anatase mixed crystal form) 4.8g, mass fraction 0.1g of 85% phosphoric acid.

[0037] The preparation method of porous magnesium oxychloride cement-based photocatalytic functional material comprises the following steps:

[0038] (1) Prepare raw materials: prepare raw materials according to the above formula, and set aside;

[0039] (2) Stir and mix the light-burned magnesia and the admixture for 3 minutes, and the obtained mixture is set aside;

[0040] (3) Add the photocatalyst and phosphoric acid to the magnesium chloride aqueous so...

Embodiment 2

[0046] Porous magnesium oxychloride cement-based photocatalytic functional material, which is prepared from light-burned magnesium oxide, magnesium chloride, foaming agent, photocatalyst, admixture and phosphoric acid, each component is 60% active by weight 96g of light-burned magnesium oxide, 208g of magnesium chloride aqueous solution with a mass fraction of 22%, and a specific surface area of ​​406 m 2 / kg of fly ash admixture 28.8g, composite blowing agent 1g, photocatalyst (TiO 2 Powder, Degussa P25, rutile / anatase mixed crystal form) 0.96g, mass fraction 0.1g of 85% phosphoric acid.

[0047] The preparation method of porous magnesium oxychloride cement-based photocatalytic functional material comprises the following steps:

[0048] (1) Prepare raw materials: prepare raw materials according to the above formula, and set aside;

[0049] (2) Stir and mix the light-burned magnesia and the admixture for 5 minutes, and the obtained mixture is set aside;

[0050] (3) Add the p...

Embodiment 3

[0060] Porous magnesium oxychloride cement-based photocatalytic functional material, which is prepared from light-burned magnesia, magnesium chloride, foaming agent, photocatalyst, admixture and phosphoric acid, each component is 65% activity by weight 120g of light-burned magnesium oxide, 134.4g of magnesium chloride aqueous solution with a mass fraction of 27.4%, and a specific surface area of ​​20,000 m 2 / kg of silica fume admixture 12g, surfactant foaming agent 1g, photocatalyst (TiO 2 Sol, solid content 20%, anatase crystal form) 72g, mass fraction 85% phosphoric acid 0.6g.

[0061] The preparation method of porous magnesium oxychloride cement-based photocatalytic functional material comprises the following steps:

[0062] (1) Prepare raw materials: prepare raw materials according to the above formula, and set aside;

[0063] (2) Stir and mix the light-burned magnesia and the admixture for 4 minutes, and the obtained mixture is set aside;

[0064] (3) Add the photocat...

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Abstract

The invention discloses a porous magnesium oxychloride cement-based photocatalytic functional material and a preparation method thereof. The porous magnesium oxychloride cement-based photocatalytic functional material disclosed by the invention is prepared from 100 parts of light-burned magnesia with the activity content of 60%-65%, 60-200 parts of magnesium chloride water solution with the mass concentration of 22%-31%, 0-30 parts of admixture, 0.2-5 parts of foaming agent, 1-20 parts of photocatalyst and 0.1-1 part of phosphoric acid with the mass concentration of 85%. The porous magnesium oxychloride cement-based photocatalytic functional material disclosed by the invention can significantly improve the capability of degrading harmful pollutants in atmosphere of the porous magnesium oxychloride cement-based photocatalytic functional material by utilizing the characteristics of porous magnesium oxychloride cement and combining with a secondary load, and has the comprehensive capability in the aspects of heat preservation, heat insulation and environmental purification.

Description

technical field [0001] The invention relates to the technical field of new functional building materials, in particular to a porous magnesium oxychloride cement-based photocatalytic functional material and a preparation method thereof. Background technique [0002] With the rapid development of my country's economy and urbanization, the problem of air pollution is becoming more and more serious. According to statistics, as of 2011, the total number of motor vehicles in my country has reached 220 million, and the total amount of motor vehicle emissions has exceeded 56 million tons. NO emission x , PM exceeds 85% of the total amount of such pollution in the atmosphere, CH and CO exceed 70% of the total amount of such pollution in the atmosphere. In addition, the problem of indoor air pollution is also particularly prominent. The concentration of harmful gases in indoor air is about 2-3 times that of outdoors. Such harmful gases mainly include formaldehyde, radon, benzene serie...

Claims

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Application Information

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IPC IPC(8): B01J35/10B01J32/00B01J21/14B01J21/06C04B28/32
Inventor 王发洲杨露胡曙光丁庆军关凌岳董跃
Owner WUHAN UNIV OF TECH
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