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Composite photocatalytic material, preparation method and application thereof

A technology of composite photocatalysis and magnetic composite materials, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc. It can solve the problems of morphology and other problems, and achieve the effect of enhancing light absorption and electron transfer, improving photocatalytic effect, and favorable photocatalytic effect.

Inactive Publication Date: 2015-12-16
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on the one hand, it is difficult to prepare a composite material with good morphology due to the uneven dispersion of ferroferric oxide, and it is unstable, making its related performance worse. On the other hand, the photocatalytic activity needs to be improved.

Method used

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  • Composite photocatalytic material, preparation method and application thereof
  • Composite photocatalytic material, preparation method and application thereof
  • Composite photocatalytic material, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] 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 rate of 4°C / min, and keep it at a constant temperature for 2h, then directly from 500°C Raise the temperature to 520°C at a rate of 4°C / min, keep it at a constant temperature for 2 hours, and cool it down to room temperature naturally to obtain the product; take out the product and grind it finely, disperse the finely ground product in an alkaline solution and ultrasonically 0.5h, then wash to neutral, centrifuged, and calcined the separated product at 250°C for 2 hours, and took out the product after the calcination was completed and dropped to room temperature to obtain g-C 3 N 4 Photocatalyst, save for future use.

[0035] Step 2, preparation of Fe by hydrothermal deposition technology 3 o 4 / g -C 3 N 4 Composite material: 1.9 g of g-C prepared in step 1 3 N 4 Disp...

Embodiment 2

[0039] 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 rate of 2.3°C / min, and keep it at a constant temperature for 2 hours, then directly from 500°C Raise the temperature to 520°C at a rate of 2.3°C / min, keep at a constant temperature for 2h, and cool down to room temperature naturally to obtain the product; take out the product and grind it finely, disperse the finely ground product in an alkaline solution for 1h, and then wash until Neutral, centrifuged, calcined the separated product at 150°C for 2 hours, and took out the product after the calcination was completed and dropped to room temperature, that is, g-C 3 N 4 Photocatalyst, save for future use.

[0040] Step 2, preparation of Fe by hydrothermal deposition technology 3 o 4 / g -C 3 N 4 Composite material: 0.8g of g-C prepared in step 1 3 N 4 Disperse in 20mL ethy...

Embodiment 3

[0044] 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 rate of 3°C / min, and keep it at a constant temperature for 2h, then directly from 500°C Raise the temperature to 520°C at a rate of 3°C / min, keep it at a constant temperature for 2 hours, and cool it down to room temperature naturally to obtain the product; take out the product and grind it finely, disperse the finely ground product in an alkaline solution for 1 hour, and then wash until Neutral, centrifuged, calcined the separated product at 300°C for 2 hours, and took out the product after the calcination was completed and dropped to room temperature, that is, g-C 3 N 4 Photocatalyst, save for future use.

[0045] Step 2, preparation of Fe by hydrothermal deposition technology 3 o 4 / g -C 3 N 4 Composite material: 3 g of g-C prepared in step 1 3 N 4 Disperse in 40mL...

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Abstract

The invention provides a composite photocatalytic material, a preparation method and an application of the composite photocatalytic material. The preparation method comprises: obtaining a precursor of g-C3N4 through high-temperature calcination; preparing a magnetic composite of Fe3O4 / g-C3N4 through hydrothermal deposition; and allowing the magnetic composite to react in a solution of silver nitrate through a thermal photodeposition method to obtain the composite photocatalytic material of Ag / Fe3O4 / g-C3N4. The composite is high in dispersion and activity, can degrade tetracycline in the environment, and has characteristics of simple synthesis and high degradation rate.

Description

technical field [0001] The invention relates to a photocatalyst, in particular to an Ag / Fe catalyst prepared by a high-temperature calcination method, a hydrothermal method and a photodeposition heat method. 3 o 4 / g -C 3 N 4 The composite photocatalytic material and its preparation method and application belong to the technical field of environmental material preparation. Background technique [0002] Tetracycline belongs to the class of antibiotics. Since its inception, it has been used clinically one after another, and has become the most widely used broad-spectrum antibiotic. However, its drug resistance and its side effects also seriously affect people's lives, and long-term low-level accumulation is prone to drug resistance; studies have shown that tetracycline may affect the development and formation of teeth, directly threatening people's lives and health. Therefore, the rational treatment of antibiotic and medical wastewater in domestic wastewater is an importan...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/30
Inventor 朱志逯子扬闫永胜霍鹏伟高乃玲王友山姚鑫黄海
Owner JIANGSU UNIV
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