a g-c 3 no 4 Photocatalyst coating and its preparation method and application

A photocatalyst, g-c3n4 technology, applied in the field of photocatalysis, can solve the problems of no activity, photocatalytic performance reduction of photocatalytic coating, etc., and achieve the effect of simple method, good photocatalytic performance and good curing effect

Active Publication Date: 2021-11-30
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through experimental tests, it was found that the photocatalytic performance of the photocatalytic coating prepared by mixing the catalyst and the binder was significantly reduced or even showed no activity.

Method used

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  • a g-c <sub>3</sub> no <sub>4</sub> Photocatalyst coating and its preparation method and application
  • a g-c <sub>3</sub> no <sub>4</sub> Photocatalyst coating and its preparation method and application

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Experimental program
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Effect test

preparation example Construction

[0018] a g-C 3 N 4 The preparation method of photocatalyst coating comprises the steps:

[0019] 1) Take g-C 3 N 4 The photocatalytic material and an appropriate amount of magnesium oxide powder are uniformly ground in a mortar, then the aluminum dihydrogen phosphate solution is added dropwise, the mixture in the mortar is stirred evenly, and then coated on the substrate by brushing or spraying. Gained film drying;

[0020] Preferably, the g-C 3 N 4 The photocatalytic material is obtained by treating the melamine precursor with acetaldehyde, and the specific surface area is 0.5-300m 2 / g of nanoparticles, nanosheets and porous structures.

[0021] By mass ratio, g-C 3 N 4 Photocatalytic material: aluminum dihydrogen phosphate = 1:0.1~1:5.

[0022] By mass ratio, g-C 3 N 4 Photocatalytic material: magnesium oxide = 1:0.5~1:2.

[0023] The substrate is glass, ceramic or metal material.

[0024] 2) The dried film is subjected to acidification treatment and high-temp...

Embodiment 1

[0028] (1) g-C obtained by different doses of magnesia curing agent 3 N 4 Effect of Photocatalyst Coating on Photocatalytic Performance

[0029] 1. g-C 3 N 4 Preparation of photocatalyst coating

[0030] The specific surface area of ​​0.1 gram is 162m 2 / g g-C 3 N 4 Pour the photocatalyst and different doses of magnesium oxide powder (0.05g, 0.1g, 0.2g) into the mortar and grind evenly, take 2ml aluminum dihydrogen phosphate solution with a pipette and add it dropwise to the g-C 3 N 4 In the photocatalyst and magnesium oxide, the mixture in the mortar was evenly stirred, and then evenly spread on the glass substrate with a small brush to obtain a film, and the glass substrate loaded with the film was placed in an oven at 100°C for drying. Put the dried film into a beaker filled with dilute sulfuric acid with a concentration of 0.1M, soak for 10 seconds, take it out and put it in an oven, and dry it at 100°C. The dried film was baked at 200°C for 60 minutes to obtain t...

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Abstract

The invention discloses a g-C 3 N 4 Photocatalyst coating and its preparation method and application. is g‑C 3 N 4 The photocatalytic material is the precursor, aluminum dihydrogen phosphate is the inorganic binder, and magnesium oxide is the curing agent. It is coated on the substrate by brushing or spraying. After drying, the g- C 3 N 4 Photocatalyst coating. The problem of encapsulation of the photocatalyst material in the photocatalytic coating is solved, the photocatalytic performance of the coating can be improved, the consumption of the photocatalytic material can be reduced, and the coating cost can be reduced. Optimum coating quality and catalytic performance are achieved through precise adjustment of acidity and corrosion time.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, in particular to g-C with high photocatalytic efficiency 3 N 4 Coatings and methods for their preparation. Background technique [0002] Photocatalytic materials have the function of purifying gas and water, and have certain application value. In the actual application process, how to apply photocatalytic materials is an important research content, which is related to the normal function of photocatalytic materials. In the practical application of photocatalytic materials, the coating of photocatalytic materials has the advantages of saving the amount of catalyst, facilitating the separation of gas-solid / liquid-solid and improving the light utilization area, so it is widely used in practical applications. However, there are many factors restricting the photocatalytic performance in the preparation process of the photocatalytic coating. The most significant problem is the encapsulation o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J37/00B01D53/86B01D53/72
CPCB01D53/007B01D53/8668B01D2257/704B01D2259/804B01J27/24B01J35/004B01J35/1009B01J35/1014B01J35/1019B01J37/0018Y02C20/30
Inventor 宋朋孔令茹
Owner LIAONING UNIVERSITY
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