Visible light catalysis water permeable brick and manufacturing method and application thereof

A visible light, permeable brick technology, applied in antifouling/underwater coatings, paving surfaces paved with prefabricated blocks, coatings, etc., can solve problems such as unfavorable photo-generated carrier transport, low photoelectric conversion efficiency, and limited application effects. , to achieve the effect of favorable for popularization and application, good sunlight absorption capacity and utilization rate, and good chemical stability

Active Publication Date: 2020-08-11
中冶南方城市建设工程技术有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the conductivity of titanium dioxide is not high, which is not conducive to the transmission of photogenerated carriers. Photogenerated electrons and holes are easy to recombine, and the photoelectric conversion efficiency is low, which limits the application effect of titanium dioxide as a photocatalytic material on permeable bricks.

Method used

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  • Visible light catalysis water permeable brick and manufacturing method and application thereof
  • Visible light catalysis water permeable brick and manufacturing method and application thereof
  • Visible light catalysis water permeable brick and manufacturing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A method for preparing visible light catalyzed water-permeable bricks is provided, and the specific steps are as follows:

[0041] (1) Preparation of g-C 3 N 4 : Put 5g of dicyandiamide in a beaker, add 150mL of deionized water, and then sonicate for 4h. After drying at 60°C, transfer the dicyandiamide into the crucible. Then put the crucible in a box-type energy-saving resistance furnace, set the programmed heating time for 4h, and then keep it at 550°C for 4h. After natural cooling, transfer the generated yellow substance into a mortar, grind and then transfer into a beaker, add 150 mL of deionized water and sonicate for 4 hours. Finally, g-C is obtained after drying at 50℃ 3 N 4 .

[0042] (2) Preparation of Fe 2 O 3 / g-C 3 N 4 Visible light catalytic composite material: weigh 0.35g of FeSO 4 ·7H 2 O, and 10g of g-C prepared in step (1) 3 N 4 mixing. Immediately, the mixture was placed in a deionized water / ethanol solution with a mass ratio of 1:1, sonicated for 4 hour...

Embodiment 2

[0054] A method for preparing visible light catalyzed water-permeable bricks is provided, and the specific steps are as follows:

[0055] (1) Preparation of g-C 3 N 4 :The preparation method is the same as in Example 1

[0056] (2) Preparation of Fe 2 O 3 / g-C 3 N 4 Visible light catalytic composite material: Weigh 1.05g FeSO 4 ·7H 2 O, and 10g g-C prepared in step (1) 3 N 4 Mixing, the other is the same as the preparation method of Example 1, the final Fe 2 O 3 / g-C 3 N 4 In visible light catalytic composite material, Fe 2 O 3 The mass percentage content of 3%.

[0057] (3) Preparation of Fe 2 O 3 / g-C 3 N 4 Visible light catalytic coating: the preparation method is the same as in Example 1.

[0058] (4) The Fe prepared in step (3) 2 O 3 / g-C 3 N 4 Visible light catalytic coating, evenly sprayed on the surface of the permeable brick substrate to obtain Fe 2 O 3 / g-C 3 N 4 The composite coating has a thickness of 5mm to obtain visible light catalytic water-permeable bricks.

[0059] The...

Embodiment 3

[0061] A method for preparing visible light catalyzed water-permeable bricks is provided, and the specific steps are as follows:

[0062] (1) Preparation of g-C 3 N 4 :The preparation method is the same as in Example 1.

[0063] (2) Preparation of Fe 2 O 3 / g-C 3 N 4 Visible light catalytic composite material: Weigh 1.75g ​​FeSO 4 ·7H 2 O, and 10g of g-C prepared in step (1) 3 N 4 Mixing, other methods are the same as in Example 1, and finally Fe 2 O 3 / g-C 3 N 4 In visible light catalytic composite material, Fe 2 O 3 The mass percentage of 5%.

[0064] (3) Preparation of Fe 2 O 3 / g-C 3 N 4 Visible light catalytic coating: the preparation method is the same as in Example 1.

[0065] (4) The Fe prepared in step (3) 2 O 3 / g-C 3 N 4 Visible light catalytic coating, evenly sprayed on the surface of the permeable brick substrate to obtain Fe 2 O 3 / g-C 3 N 4 The composite coating has a thickness of 5mm to obtain visible light catalytic water-permeable bricks.

[0066] The performance test ...

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Abstract

The invention discloses a visible light catalysis water permeable brick and a manufacturing method and application thereof. The visible light catalysis water permeable brick comprises a water permeable brick base body and further comprises a visible light catalysis layer on the surface of the water permeable brick base body, the visible light catalysis layer is a Fe2O3 / g-C3N4 composite coating, and the visible light catalysis water permeable brick is prepared by coating the Fe2O3 / g-C3N4 visible light catalysis coating on the water permeable brick base body. The preparation method comprises thefollowing steps: preparing the Fe2O3 / g-C3N4 visible light catalytic composite material, uniformly mixing the Fe2O3 / g-C3N4 visible light catalytic composite material with silica sol, a potassium silicate aqueous solution, a silane coupling agent, a leveling agent, a dispersing agent, an antifoaming agent and a thickener to obtain a coating, and coating the surface of the water permeable brick basebody with the coating to form the Fe2O3 / g-C3N4 composite coating. The visible light catalysis water permeable brick is high in sunlight utilization rate, strong in absorption capacity, high in visible light catalysis efficiency, and capable of adsorbing and effectively catalyzing organic pollutants and motor vehicle tail gas, purifying rainwater and preventing blockage.

Description

Technical field [0001] The invention relates to the technical field of permeable bricks, in particular to a visible light catalyzed permeable brick, and a manufacturing method and application thereof. Background technique [0002] With the continuous advancement of the construction of urban ecological civilization, "sponge city" has become a hot vocabulary in the process of urban development and construction. The treatment of urban water pollution, especially the treatment of wastewater containing organic matter, has become a hot issue in the world today. In the water environment treatment process, low-concentration organic pollutants (pesticides, antibiotics, humus, etc.) have a more complex composition structure and are difficult to biochemically degrade, which has a great impact on water safety. Photocatalytic oxidation can effectively solve this type of difficult-to-degrade pollution. Things. As a new environmental remediation technology, the research and application of phot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D127/12C09D5/32C09D5/16C09D7/61E01C5/04E01C11/22C04B28/06C04B111/40
CPCC09D127/12C09D5/32C09D5/1668C09D5/1687E01C5/04E01C11/225C04B28/06C08K2003/2272E01C2201/20C04B2111/40C04B2111/00284C04B2201/50C08K13/02C08K3/22C08K3/28C08K3/34C08K3/36C04B18/146C04B7/02C04B18/16C04B18/027C04B2103/302
Inventor 王家谢如意张昕健
Owner 中冶南方城市建设工程技术有限公司
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