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Surface molecular imprinting composite photocatalytic material as well as preparation method and application thereof

A technology of surface molecular imprinting and composite photocatalysis, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, etc., can solve the problem of long degradation time and inability to selectively degrade a single To achieve high purity, enhance recycling performance, and improve utilization rate

Inactive Publication Date: 2015-11-11
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, ordinary photocatalysts have the disadvantage of not being able to selectively degrade a single target among a variety of target pollutants. At the same time, the long degradation time has also become an obstacle for photocatalysts to degrade pollutants.

Method used

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  • Surface molecular imprinting composite photocatalytic material as well as preparation method and application thereof
  • Surface molecular imprinting composite photocatalytic material as well as preparation method and application thereof
  • Surface molecular imprinting composite photocatalytic material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Step 1. Preparation of g-C 3 N 4 Photocatalyst: Put 5g of purchased melamine into a crucible, place it in a muffle furnace, and calcine it in an air atmosphere, raise the temperature to 500°C at a heating rate of 4°C / min, and keep it at a constant temperature for 2 hours. Continue to heat up to 520°C, keep at constant temperature for 2 hours, and cool down to room temperature naturally to obtain g-C 3 N 4 Photocatalyst; save for future use.

[0033] Step 2, preparation of Fe by hydrothermal deposition technology 3 o 4 / g -C 3 N 4 Composite material: weigh 2.2gg-C 3 N 4 Disperse in 600ml of ethanol / water solution with a volume ratio of 1:2 and sonicate for 5 hours to make g-C 3 N 4 suspension; the 2mmolFeCl 3 ·6H 2 O and 1 mmol FeCl 2 4H 2 O each dissolved in 20ml of distilled water and added to the above g-C 3 N 4 suspension to obtain a mixed solution. The above mixture was stirred at 80°C for 30 min, and then 10 ml of ammonia water was quickly injected...

Embodiment 2

[0037] Step 1. Preparation of g-C 3 N 4 Photocatalyst: Put 5 g of purchased melamine into a crucible, place it in a muffle furnace, and calcine it in an air atmosphere. Raise the temperature to 500°C at a heating rate of 2.3°C / min, and keep it at a constant temperature for 2 hours. The heating rate continued to rise to 520°C, and kept at a constant temperature for 2 hours, and then cooled to room temperature naturally to obtain g-C 3 N 4 Photocatalyst; save for future use.

[0038] Step 2, preparation of Fe by hydrothermal deposition technology 3 o 4 / g -C 3 N 4 Composite material: weigh 2.2gg-C 3 N 4 Disperse in 600ml of ethanol / water solution with a volume ratio of 1:2 and sonicate for 5 hours to make g-C 3 N 4 suspension; the 2mmolFeCl 3 ·6H 2 O and 1 mmol FeCl 2 4H 2 O each dissolved in 20ml of distilled water and added to the above g-C 3 N 4 suspension to obtain a mixed solution. The above mixture was stirred at 80°C for 30 min, and then 10 ml of ammonia ...

Embodiment 3

[0042] Step 1. Preparation of g-C 3 N 4 Photocatalyst: Put 5 g of purchased melamine into a crucible, place it in a muffle furnace, and calcine it in an air atmosphere, raise the temperature to 500 °C at a heating rate of 4 °C / min, and keep it at a constant temperature for 2 hours. The heating rate continued to rise to 520°C, and kept at a constant temperature for 2 hours, and then cooled to room temperature naturally to obtain g-C 3 N 4 Photocatalyst; save for future use.

[0043] Step 2, preparation of Fe by hydrothermal deposition technology 3 o 4 / g -C 3 N 4 Composite material: weigh 2.2gg-C 3 N 4 Disperse in 600ml of ethanol / water solution with a volume ratio of 1:2 and sonicate for 5 hours to make g-C 3 N 4 suspension; the 2mmolFeCl 3 ·6H 2 O and 1 mmol FeCl 2 4H 2 O each dissolved in 20ml of distilled water and added to the above g-C 3 N 4 suspension to obtain a mixed solution. The above mixture was stirred at 80°C for 30 min, and then 10 ml of ammonia ...

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Abstract

The invention provides a preparation method of a surface molecular imprinting composite photocatalytic material and belongs to the technical field of environmental material preparation. The preparation method comprises the following steps: preparing g-C3N4 by use of high-temperature calcining, preparing Fe3O4 / g-C3N4-loaded photocatalyst by use of a hydrothermal sedimentation technology, and performing polypyrrole modification on the Fe3O4 / g-C3N4-loaded photocatalyst; and performing surface modification on the Fe3O4 / g-C3N4-loaded photocatalyst by use of a surface molecular imprinting technology, thereby preparing a surface molecular imprinting PPy / Fe3O4 / g-C3N4 composite photocatalytic material with relatively high catalytic activity. By virtue of the synergetic effect of PPy and g-C3N4, the photocatalytic effect is improved; furthermore, due to the excellent conduction performance of Fe3O4, the photocatalytic speed, the Fe3O4 magnetism and the surface molecular imprinting composite photocatalyst recycling are greatly improved, By virtue of introduction of the surface molecular imprinting technology, the purpose of selectively degrading target pollutants can be well realized, and the defect that a common photocatalyst can not selectively degrade the target pollutants can be overcome.

Description

technical field [0001] The invention relates to a photocatalyst, in particular to a surface molecularly imprinted PPy / Fe prepared by thermally induced polymerization imprinting method 3 o 4 / g -C 3 N 4 The preparation method and application thereof belong to the technical field of environmental material preparation. Background technique [0002] Dimercaptobenzothiazole belongs to mercaptan pollutants and is a toxic substance produced during the synthesis of industrial products. Its toxicity seriously affects people's normal life. Studies have shown that mercaptan pollution will emit a strong and unpleasant smell. Inhaling a small amount of low-concentration mercaptan pollutants will make people feel sick. If the concentration is too high, it may cause symptoms such as coma and directly threaten people's lives. healthy. Therefore, it is an important link to reasonably deal with the mercaptan pollutants contained in domestic and production wastewater. Currently, photocat...

Claims

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Application Information

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IPC IPC(8): B01J31/28A62D3/17A62D101/28
Inventor 朱志逯子扬闫永胜赫明霍鹏伟王友山高乃玲赵晓旭
Owner JIANGSU UNIV
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