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Photocatalytic aggregate taking regenerated asphalt aggregate as matrix and preparation method thereof

A technology of regenerated asphalt and photocatalysis, which is applied in the direction of chemical instruments and methods, separation methods, physical/chemical process catalysts, etc., to achieve the effect of improving cost-efficiency ratio, good economic and environmental benefits, and overcoming catalyst spalling

Active Publication Date: 2019-06-04
FUZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

After a large number of patents and literature searches, there are no research reports on photocatalytic aggregates based on recycled asphalt aggregates.

Method used

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  • Photocatalytic aggregate taking regenerated asphalt aggregate as matrix and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0027] The photocatalytic aggregate based on the recycled asphalt aggregate in the example of the present invention is mainly made of the following raw materials in mass percentage: the recycled asphalt aggregate is: 92%, nano-sheet g-C 3 N 4 is 8%, and the total weight of the two satisfies 100%. The recycled asphalt aggregate with a specification of 0.05-3 mm is taken, and its main components are as follows: 5% asphalt, SiO 2 45%, CaCO 3 38%, Fe 2 o 3 3%, Al 2 o 3 9%.

[0028] The preparation method of the photocatalytic aggregate taking the regenerated asphalt aggregate of the example of the present invention as the matrix, the concrete steps are:

[0029] (1) Take nanosheet g-C 3 N 4 Ultrasonic dispersion in absolute ethanol for 3 hours yielded nanosheet g-C 3 N 4 Dispersion, in which absolute ethanol and nanoflake g-C 3 N 4 The mass ratio is: 8:1;

[0030] (2) Take the recycled asphalt aggregate and ultrasonically treat it in 0.1M sodium hydroxide solutio...

Embodiment 2

[0034] The photocatalytic aggregate based on the recycled asphalt aggregate of the example of the present invention is mainly made of the following raw materials in mass percentage: the recycled asphalt aggregate is: 96%, block g-C 3 N 4 is 4%, and the total weight of the two satisfies 100%. The recycled asphalt aggregate with a specification of 3-5 mm is taken, and its main components are as follows: 4% asphalt, SiO 2 46%, CaCO 3 38%, Fe 2 o 3 3%, Al 2 o 3 9%.

[0035] The preparation method of the photocatalytic aggregate taking the regenerated asphalt aggregate of the example of the present invention as the matrix, the concrete steps are:

[0036] (1) Take block g-C 3 N 4 Ultrasonic dispersion in absolute ethanol for 2 hours to obtain block g-C 3 N 4 Dispersion, in which absolute ethanol and block g-C 3 N 4 The mass ratio is: 16:1;

[0037] (2) Take regenerated asphalt aggregates and ultrasonically treat them in 0.1M sodium hydroxide solution for 45 minute...

Embodiment 3

[0041] The photocatalytic aggregate based on the recycled asphalt aggregate of the example of the present invention is mainly made of the following raw materials in mass percentage: the recycled asphalt aggregate is: 95%, nano-sheet g-C 3 N 4 5%, and the total weight of the two satisfies 100%. The recycled asphalt aggregate with a specification of 5-10 mm is taken, and its main components are as follows: 4% asphalt, SiO 2 46%, CaCO 3 38%, Fe 2 o 3 3%, Al 2 o 3 9%.

[0042] The preparation method of the photocatalytic aggregate taking the regenerated asphalt aggregate of the example of the present invention as the matrix, the concrete steps are:

[0043] (1) Take nanosheet g-C 3 N 4 Ultrasonic dispersion in absolute ethanol for 1 hour yielded nanosheet g-C 3 N 4 Dispersion, in which absolute ethanol and nanoflake g-C 3 N 4 The mass ratio is: 10:1;

[0044] (2) Ultrasonically treat recycled asphalt aggregates in 0.1M sodium hydroxide solution for 30 minutes, an...

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Abstract

The invention discloses a photocatalytic aggregate taking a regenerated asphalt aggregate as a matrix and a preparation method thereof. The photocatalytic aggregate is composed of the regenerated asphalt aggregate and graphite-phase carbon nitride (g-C3N4). The preparation method comprises the following steps: ultrasonically dispersing g-C3N4 powder in absolute ethyl alcohol for 1-3 hours so as toobtain a g-C3N4 dispersion liquid; carrying out ultrasonic treatment on the regenerated asphalt aggregate in a 0.1m sodium hydroxide solution for 30-60 minutes to obtain an alkali-treated regeneratedasphalt aggregate; using a dipping method to allow the g-C3N4 to be attached to the surface of the alkali-treated regenerated asphalt aggregate; and washing and drying to obtain the photocatalytic aggregate. The photocatalytic aggregate has the function of degrading air pollutants under visible light irradiation, the g-C3N4 is firmly attached to the surface of the regenerated asphalt aggregate, meanwhile, the hydrophobicity of the g-C3N4 is combined, the g-C3N4 can effectively overcome the problem of catalyst stripping caused by rain wash in actual application, and the photocatalytic aggregate has a good application prospect.

Description

technical field [0001] The invention belongs to the field of environment-friendly materials, and in particular relates to a photocatalytic aggregate with recycled asphalt aggregate as a matrix and a preparation method thereof. Background technique [0002] With the rapid development of my country's economy, the emissions of industrial waste gas and automobile exhaust have increased sharply, among which nitrogen oxides (NO x , mainly NO 2 and NO) not only participate in the destruction of the ozone layer, form acid rain and photochemical smog, but also have toxic effects on the human body. [0003] In order to reduce the harm caused by air pollution, the government has carried out a series of pollution prevention and control work, including the implementation of various emission regulations and standards, and research on emission reduction and control for pollution sources. These measures have achieved certain results in controlling the total amount of pollutant discharge. ...

Claims

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Application Information

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IPC IPC(8): B01J31/28B01D53/00B01D53/86
Inventor 苏文悦杨宇钱心嘉季韬戴文新王心晨
Owner FUZHOU UNIVERSITY
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