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Preparation method of photocatalytic cement-based material

A cement-based material and photocatalysis technology, which is applied in the field of photocatalytic cement-based materials, can solve the problems of complex operation and high cost of the preparation method, and achieve the effects of accelerating the bonding rate, low cost, and improving compressive strength

Inactive Publication Date: 2019-01-01
JIANGXI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of photocatalytic cement-based materials, which aims to solve the problems of complicated operation and high cost of existing preparation methods

Method used

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  • Preparation method of photocatalytic cement-based material
  • Preparation method of photocatalytic cement-based material
  • Preparation method of photocatalytic cement-based material

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preparation example Construction

[0025] Please refer to figure 1 , the preparation method of the photocatalytic cement-based material provided by the embodiment of the present invention comprises the following steps:

[0026] Step 1, mix the cement sample and water according to the mass ratio, and let it stand to prepare the cement matrix layer;

[0027] Step 2: Mix the photocatalyst, cement sample and water according to the mass ratio to form a mixture, mix and stir well to prepare a photocatalytic covering layer, and then apply the photocatalytic covering layer on the surface of the cement matrix layer to obtain a photocatalytic cement composite, and stand still;

[0028] Step 3, placing the photocatalytic cement complex in water for curing.

[0029] The preparation method of the photocatalytic cement-based material provided by the embodiment of the present invention, firstly, prepare the cement matrix layer; secondly, prepare the photocatalytic covering layer; wherein, the cement sample in the photocatal...

Embodiment 1

[0031] Step 1, mix 100g of slag portland cement and 25g of water, put it in the mold, shake it tightly, and let it stand for 45min to prepare the cement matrix layer;

[0032] Step 2, after mixing and shaking 1.3157g of nano-titanium dioxide, 20g of slag silicate water and 5g of water, a photocatalytic covering layer is prepared, and the photocatalytic covering layer is coated on the surface of the cement matrix layer. Realize, obtain photocatalytic cement composite body, and leave standstill 1 day;

[0033] Step 3, put the photocatalytic cement complex in water for curing for 7 days, and then take it out.

[0034] The compressive strength of the photocatalytic cement composite after curing for 7 days was 24.5MPa. The thickness of the photocatalytic cover layer is 1 mm.

[0035] figure 2 The degradation curve of the photocatalytic cement composite prepared in Example 1 of the present invention to rhodamine B solution. Such as figure 2 As shown, under light conditions, t...

Embodiment 2

[0037] Step 1, mix 100g of pozzolanic portland cement and 50g of water, mix evenly, place in the mold, shake it tightly, and let it stand for 90min to prepare the cement matrix layer;

[0038] Step 2, after mixing and shaking 0.05g of nano-zinc oxide, 30g of pozzolanic Portland cement and 15g of water, the photocatalytic coating is prepared, and the photocatalytic coating is coated on the surface of the cement matrix layer , shaken to obtain a photocatalytic cement complex, and let it stand for 2 days;

[0039] In step 3, the photocatalytic cement complex is placed in water for curing for 1 day, and then taken out.

[0040] The compressive strength of the photocatalytic cement composite after curing for 1 day was 8.45MPa. The thickness of the photocatalytic covering layer is 0.01 mm.

[0041] image 3 The degradation curve of the photocatalytic cement composite prepared for Example 2 of the present invention to the methyl orange solution. Such as image 3 As shown, under ...

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Abstract

The invention relates to the technical field of photocatalytic cement-based materials and provides a preparation method of a photocatalytic cement-based material. The preparation method comprises thefollowing steps of firstly, preparing a cement matrix layer; secondly, preparing a photocatalytic covering layer, and then coating the surface of the cement matrix layer with the photocatalytic covering layer to obtain a photocatalytic cement complex; and finally, putting the photocatalytic cement complex in water for maintenance. In the preparation method, a cement sample in the photocatalytic covering layer is identical to a cement sample in the cement matrix layer, so that the two of the photocatalytic covering layer and the cement matrix layer are easier in crystallization combination, i.e. the structure stability of the photocatalytic cement complex is higher; by putting the photocatalytic cement complex in the water for still standing, the combination rate of a cement sample crystalin the photocatalytic covering layer and a cement sample crystal in the cement matrix layer can be accelerated, and the compressive strength of the photocatalytic cement complex is further improved; and the whole process is simple to operate without using an additional adhesive and lower in cost and is more environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of photocatalytic cement-based materials, and in particular provides a preparation method of photocatalytic cement-based materials. Background technique [0002] With the deepening of resource development and utilization, the environmental pollution problems are becoming more and more serious. Every year, about 30 to 40 billion tons of industrial pollutants are dumped into the already scarce water resources. A large number of organic pollutants include phenols, chemical fertilizers, and pesticides. , detergents and synthetic fuels are discharged into rivers, which not only seriously pollutes the surrounding soil environment, but also directly endangers human survival. For example, organochlorine pesticides are highly toxic, highly mobile and difficult to degrade. And other ways into drinking water, and then produce carcinogenic effect on human body. Semiconductor photocatalysis technology uses solar energy ...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B28/08C04B41/68
CPCC04B28/04C04B28/08C04B41/5024C04B41/68C04B22/06C04B22/14
Inventor 冯胜雷
Owner JIANGXI UNIV OF TECH
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