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A visible light catalytic permeable brick and its production method and application

A visible light, permeable brick technology, applied in anti-fouling/underwater coatings, paving surfaces paved with prefabricated blocks, roads, etc., can solve problems such as unfavorable photo-generated carrier transport, low photoelectric conversion efficiency, and limited application effects. To achieve the effect of simple and easy-to-obtain raw materials, good sunlight absorption capacity and utilization rate, and conducive to popularization and application

Active Publication Date: 2022-04-01
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

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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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  • A visible light catalytic permeable brick and its production method and application
  • A visible light catalytic permeable brick and its production method and application
  • A visible light catalytic permeable brick and its production method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A method for preparing a visible light catalyzed permeable brick 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 ultrasonically vibrate for 4h. After drying at 60 °C, the dicyandiamide was transferred into a crucible. Then put the crucible in a box-type energy-saving resistance furnace, set the temperature program for 4h, and then keep it at 550°C for 4h. After natural cooling, the resulting yellow substance was transferred into a mortar for grinding, then transferred into a beaker, and 150 mL of deionized water was added for ultrasonic vibration for 4 h. Finally, after drying at 50°C, g-C 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 the g-C that 10g step (1) prepares 3 N 4 mix. The mixture was then placed in a deionized water / ethanol solution with...

Embodiment 2

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

[0055] (1) Preparation of g-C 3 N 4 : preparation method is with embodiment 1.

[0056] (2) Preparation of Fe 2 o 3 / g -C 3 N 4 Visible light catalytic composite material: weigh 1.05g of FeSO 4 ·7H 2 O, with 10g of g-C prepared in step (1) 3 N 4 Mix, other is identical with embodiment 1 preparation method, the last gained Fe 2 o 3 / g -C 3 N 4 In visible photocatalytic composite materials, Fe 2 o 3 The mass percentage content is 3%.

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

[0058] (4) Fe prepared by step (3) 2 o 3 / g -C 3 N 4 Visible light catalytic coating, uniformly sprayed on the surface of the permeable brick substrate, to obtain Fe 2 o 3 / g -C 3 N 4 Composite coating with a thickness of 5 mm can obtain a visible light catalyzed pe...

Embodiment 3

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

[0062] (1) Preparation of g-C 3 N 4 : preparation method is with embodiment 1.

[0063] (2) Preparation of Fe 2 o 3 / g -C 3 N 4 Visible light catalytic composite material: weigh 1.75g ​​of FeSO 4 ·7H 2 O, and the g-C that 10g step (1) prepares 3 N 4 Mix, other is identical with embodiment 1 method, the last gained Fe 2 o 3 / g -C 3 N 4 In visible photocatalytic composite materials, Fe 2 o 3 The mass percentage content is 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) Fe prepared by step (3) 2 o 3 / g -C 3 N 4 Visible light catalytic coating, uniformly sprayed on the surface of the permeable brick substrate, to obtain Fe 2 o 3 / g -C 3 N 4 Composite coating with a thickness of 5 mm can obtain a visible light catalyzed permeable...

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Abstract

The invention discloses a visible light catalyzed permeable brick as well as a manufacturing method and application thereof. The visible light catalytic permeable brick includes a permeable brick base and a visible light catalytic layer on the surface of the permeable brick base. The visible light catalytic layer is Fe 2 o 3 / g‑C 3 N 4 Composite coating, by incorporating Fe 2 o 3 / g‑C 3 N 4 The visible light catalytic coating is prepared by coating on the permeable brick substrate. Its preparation is: the preparation obtains Fe 2 o 3 / g‑C 3 N 4 Visible light catalyzed composite material, and then mixed with silica sol, potassium silicate aqueous solution, silane coupling agent, leveling agent, dispersant, defoamer and thickener to obtain a coating, which is coated on the surface of the permeable brick substrate to form Fe 2 o 3 / g‑C 3 N 4 Composite coating can be. The visible light catalytic permeable brick has high utilization rate of sunlight, strong absorption capacity, high visible light catalytic efficiency, can absorb and effectively catalyze organic pollutants and motor vehicle exhaust, purify rainwater, and prevent clogging.

Description

technical field [0001] The invention relates to the technical field of permeable bricks, in particular to a visible light catalyzed permeable brick and its manufacturing method and application. Background technique [0002] With the continuous advancement of urban ecological civilization construction, "sponge city" has become a hot topic in the process of urban development and construction, and the treatment of urban water pollution, especially the treatment of organic wastewater has become a hot issue in the world today. In the process of water environment treatment, the composition structure of low-concentration organic pollutants (pesticides, antibiotics, humus, etc.) is more complex and difficult to biochemically degrade, which has a great impact on water safety, and photocatalytic oxidation can effectively solve this kind of refractory pollution. things. As a new environmental restoration technology—the research and application of photocatalysis in the field of urban e...

Claims

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Application Information

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Patent Type & Authority Patents(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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