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A kind of graphitic carbon nitride modified fabric visible light catalyst and its one-step preparation method and application

A graphitic carbon nitride, visible light technology, applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as limitations, achieve good catalytic performance, The effect of excellent repeated use performance and high catalytic activity

Active Publication Date: 2022-07-12
ANHUI POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, g-C 3 N 4 Usually, high-temperature calcination is required to show high catalytic activity, which limits the application of fiber materials that are not resistant to high temperatures.

Method used

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  • A kind of graphitic carbon nitride modified fabric visible light catalyst and its one-step preparation method and application
  • A kind of graphitic carbon nitride modified fabric visible light catalyst and its one-step preparation method and application
  • A kind of graphitic carbon nitride modified fabric visible light catalyst and its one-step preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The one-step preparation method of a graphitic carbon nitride modified fabric visible light catalyst comprises the following steps:

[0034] 1) uniformly mix urea and copper acetate in a mass ratio of 0.5:1, process at 90°C for 2 hours, then vacuum dry at 60°C for 12 hours, and finally seal the resulting modified liquid for use;

[0035] 2) Immerse the polyester fabric in the modification solution prepared in step 1), the ratio of the weight of the polyester fabric to the volume of the modification solution is 1:50 g / ml, and then place it in a high temperature and high pressure reactor with a polytetrafluoroethylene lining , sealed, and subjected to a modification reaction at 180 ° C for 24 hours. After cooling to room temperature naturally, distilled water was used to treat the obtained pale yellow fabric-like g-C 3 N 4 After washing the modified polyester fabric for 3-5 times, vacuum drying at 60°C for 12 hours can obtain the visible light catalyst of graphite phase ...

Embodiment 2

[0037] The one-step preparation method of a graphitic carbon nitride modified fabric visible light catalyst comprises the following steps:

[0038] The mass ratio of the urea to the copper acetate is 1:1, and the rest are the same as in Example 1; the graphitic carbon nitride modified fabric visible light catalyst prepared by the one-step method is obtained, abbreviated as g-C 3 N 4 -2.

Embodiment 3

[0040] The one-step preparation method of a graphitic carbon nitride modified fabric visible light catalyst comprises the following steps:

[0041] The mass ratio of the urea to the copper acetate is 1.5:1, and the rest are the same as in Example 1, and the graphitic carbon nitride modified fabric visible light catalyst prepared by the one-step method is obtained, abbreviated as g-C 3 N 4 -3.

[0042] The present invention adopts the following method to measure the load of the above obtained catalyst: before the reaction starts, the weight of the fabric is weighed and recorded, after the reaction is completed, the obtained fabric is fully washed and dried, weighed and recorded, and then the obtained catalyst is calculated separately. Medium g-C 3 N 4 The loading is in mg / g.

[0043] exist figure 1 (Example 1-3), with the increase of urea concentration, the g-C of the prepared catalyst 3 N 4 The load is gradually increased. This shows that increasing the urea concentrat...

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PUM

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Abstract

The invention provides a graphitic carbon nitride modified fabric visible light catalyst and a one-step preparation method and application thereof. Urea and transition metal salt compounds can be heated and melted to form a low eutectic solvent system, and after polyester fabric is placed in the system, The polyester fiber swells slightly, which is beneficial for the urea molecules to enter and penetrate the surface of the polyester fiber, thereby forming a graphitic carbon nitride under high temperature and high pressure conditions, making it more firmly fixed on the fiber surface. The graphitic carbon nitride gradually forms a precipitate. When the prepared catalyst is used for indoor air purification, it can rapidly degrade pollutants such as formaldehyde and achieve a removal rate of more than 99% within 90 minutes; moreover, the catalyst has excellent recycling performance, and can still have excellent catalytic performance after washing with water.

Description

technical field [0001] The invention relates to a chemical catalyst technology, in particular to a graphitic carbon nitride modified fabric visible light catalyst and a one-step preparation method and application thereof, in particular to a graphitic carbon nitride ( g-C 3 N 4 ) modified fabric visible light catalyst and preparation method thereof. Background technique [0002] Indoor harmful gases mainly include formaldehyde released from decorative materials, and methyl mercaptan, hydrogen sulfide and ammonia generated in the living environment. Among them, formaldehyde is the most harmful to the human body, and has become the most harmful pollutant in indoor pollution. It has strong irritation to the eyes, respiratory tract and skin of the human body. Long-term exposure to low-concentration formaldehyde can cause nausea, bronchitis, and conjunctivitis. and other symptoms. Nano titanium dioxide can decompose and oxidize air pollutants such as formaldehyde adsorbed on t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J31/06B01D53/86B01D53/72
CPCB01J35/004B01J27/24B01J31/069B01J31/06B01D53/8668Y02W10/37
Inventor 王鹏王宗乾李长龙应丽丽程绿竹万颖萍
Owner ANHUI POLYTECHNIC UNIV