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Preparation method and application of urea PDI polymer/MoS2 catalyst

A polymer and catalyst technology, applied in the field of composite photocatalyst preparation, can solve the problems of insufficient mass production, increased specific surface area of ​​materials, increased active sites, etc., and achieves the effects of low cost, large output and simple process

Pending Publication Date: 2022-07-29
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most MoS 2 The modified method has the disadvantage of high cost, which is not enough for large-scale production. Ball milling technology is widely used in engineering because of its advantages of convenient operation, low cost, and easy upgrade.
In addition, the internal structure of the material will be exposed after ball milling, resulting in an increase in the specific surface area of ​​the material and more active sites.

Method used

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  • Preparation method and application of urea PDI polymer/MoS2 catalyst
  • Preparation method and application of urea PDI polymer/MoS2 catalyst
  • Preparation method and application of urea PDI polymer/MoS2 catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Urea PDI polymer / MoS of this example 2 The preparation method of catalyst, comprises the steps:

[0025] (1) Put urea, perylene-3,4,9,10-tetracarboxylic dianhydride, anhydrous zinc acetate and imidazole in an atmosphere of 1:6.5:3.08:41.67 in a mass ratio of 140 °C in four The necked flask is used for organic synthesis, hydrochloric acid is added and stirred to obtain a stirred product;

[0026] (2) Filtration, washing to neutrality and drying of the stirred product to obtain urea PDI polymer powder, wherein the filtration membrane pore size is 0.22 μm, and the drying temperature is 60 °C;

[0027] (3) MoS with a mass ratio of 1:1 2 Put the urea-PDI polymer into the ball mill in the steel container for 45min to obtain the product ball-milled urea-PDI polymer / MoS 2 Composite photocatalyst, denoted as UM-45;

[0028] Urea PDI polymer / MoS obtained by the preparation method 2 The catalyst can be applied to degrade tetracycline in water, and the steps are as follows:

...

Embodiment 2

[0031] Urea PDI polymer / MoS of this example 2 The preparation method of catalyst, comprises the steps:

[0032] (1) Put urea, perylene-3,4,9,10-tetracarboxylic dianhydride, anhydrous zinc acetate and imidazole in an air atmosphere at a temperature of 110 °C in four The necked flask is used for organic synthesis, hydrochloric acid is added and stirred to obtain a stirred product;

[0033] (2) Filtration, washing to neutrality and drying of the stirred product to obtain urea PDI polymer powder, wherein the filtration membrane pore size is 0.22 μm, and the drying temperature is 50 °C;

[0034] (3) MoS with a mass ratio of 1:1.5 2 Put the urea-PDI polymer into the ball mill in the steel container for 30min to obtain the product ball-milled urea-PDI polymer / MoS 2 Composite photocatalyst, denoted as UM-30;

[0035] Urea PDI polymer / MoS obtained by the preparation method2 The catalyst can be applied to degrade tetracycline in water, and the steps are as follows:

[0036] Take ba...

Embodiment 3

[0038] Urea PDI polymer / MoS of this example 2 The preparation method of catalyst, comprises the steps:

[0039] (1) Put urea, perylene-3,4,9,10-tetracarboxylic dianhydride, anhydrous zinc acetate and imidazole in an air atmosphere at a temperature of 120 ℃ in four The necked flask is used for organic synthesis, hydrochloric acid is added and stirred to obtain a stirred product;

[0040] (2) Filtration, washing to neutrality and drying of the stirred product to obtain urea PDI polymer powder, wherein the filtration membrane pore size is 0.45 μm, and the drying temperature is 60 °C;

[0041] (3) MoS with a mass ratio of 1:0.7 2 Put the urea-PDI polymer into the ball mill in the steel container for 60min to obtain the product ball-milled urea-PDI polymer / MoS 2 Composite photocatalyst, denoted as UM-60;

[0042] Urea PDI polymer / MoS obtained by the preparation method 2 The catalyst can be applied to degrade tetracycline in water, and the steps are as follows:

[0043] Take b...

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PUM

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Abstract

The invention discloses a preparation method and application of a urea PDI polymer / MoS2 catalyst, the preparation method of the catalyst comprises the following steps: taking urea, perylene-3, 4, 9, 10-tetracarboxylic dianhydride, anhydrous zinc acetate and imidazole as raw materials, adopting an organic synthesis method to obtain a urea PDI polymer, and carrying out ball milling to obtain a ball-milled urea PDI polymer / MoS2 composite photocatalyst, the ball milling time being 30-60 min. The urea PDI polymer / MoS2 catalyst prepared by the method is simple in preparation process and high in yield, has the characteristics of large specific surface area and multiple reaction sites, and can activate persulfate under visible light to efficiently catalyze and degrade tetracycline in water.

Description

technical field [0001] The invention relates to a preparation method and application of a composite photocatalyst, in particular to a urea PDI polymer / MoS 2 Catalyst preparation method and application. Background technique [0002] Tetracycline antibiotics (TCs) are a class of antibiotics that have been used earlier and are widely used. They use hydrogenated tetracene as the basic nucleus, which can be combined with alkali or acid to form salts. moderately stable. After TCs are applied to organisms, it is difficult to be fully utilized. More than 75% of TCs are excreted in the form of prototype or metabolites through urine and feces, and eventually inevitably enter the water environment, which will have toxic effects on non-target organisms and adversely affect the water environment. The aquatic organisms pose potential hazards, and may be transmitted in the food chain through bioaccumulation, thus posing a threat to the entire ecological environment and even human health....

Claims

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Application Information

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IPC IPC(8): B01J31/06B01J27/051C02F1/30C02F101/38C02F101/34
CPCB01J31/063B01J27/051C02F1/30C02F2305/10C02F2101/38C02F2101/34B01J35/39Y02W10/37
Inventor 何欢李鸿渐季秋忆徐哲杜可洵叶潇倩杨绍贵李时银张利民
Owner NANJING NORMAL UNIVERSITY
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