Preparation method of graphite-type carbon nitride composite nickel ferrite magnetic photocatalytic material

A technology of graphite carbon nitride and photocatalytic material, applied in the field of photocatalysis, can solve the problem of difficult recovery of nickel ferrite carbon nitride, achieve high activity and stability, avoid environmental pollution, and help recycling. Effect

Active Publication Date: 2015-09-23
南通市金宏电化设备有限公司
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of graphite-type carbon nitride composite nickel ferrite magnetic photocatalyst and the application of the composite material activated hydrogen peroxide photodegradation dye methylene blue, which solves the problem of poor nickel ferrite activity and difficult recovery of carbon nitride question

Method used

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  • Preparation method of graphite-type carbon nitride composite nickel ferrite magnetic photocatalytic material
  • Preparation method of graphite-type carbon nitride composite nickel ferrite magnetic photocatalytic material
  • Preparation method of graphite-type carbon nitride composite nickel ferrite magnetic photocatalytic material

Examples

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Effect test

Embodiment 1

[0025] Example 1: 5.7 mg of graphite carbon nitride and 114.3 mg of nickel ferrite were added into 20 ml of absolute anhydrous ethanol, stirred and dispersed for 8 hours, and then heat-treated in an oven at 50° C. for 16 hours to obtain the photocatalyst.

[0026] Take 50mg of the catalyst obtained in Example 1 and add it to 50ml of methylene blue (10mg / l), stir magnetically in a constant temperature water bath at 30°C and let in air, add hydrogen peroxide after dark reaction for 1 hour, and use a 300w lamp equipped with an ultraviolet filter A visible light source was used to irradiate the system, and 4 ml of the suspension was taken every 30 minutes and centrifuged to test the absorbance.

[0027] The graphene-like carbon nitride / nickel ferrite composite photocatalyst prepared by embodiment 1 has a degradation rate of 66% to methylene blue in 4 hours, as image 3 .

Embodiment 2

[0028] Example 2: 8.5 mg of graphite carbon nitride and 111.5 mg of nickel ferrite were added into 20 ml of absolute anhydrous ethanol, stirred and dispersed for 10 hours, and then heat-treated in an oven at 110° C. for 10 hours to obtain the photocatalyst.

[0029] Take 50mg of the catalyst obtained in Example 2 and add it to 50ml of methylene blue (10mg / l), stir magnetically in a constant temperature water bath at 30°C and let in air, add hydrogen peroxide after dark reaction for 1 hour, and use a 300w UV filter installed at the same time A visible light source was used to irradiate the system, and 4 ml of the suspension was taken every 30 minutes and centrifuged to test the absorbance.

[0030] The graphene-like carbon nitride / nickel ferrite composite photocatalyst prepared by embodiment 2 has a degradation rate of 87% to methylene blue in 4 hours, as Figure 4 , the activity of the composite photocatalyst is the highest when the mass ratio is 1:13-14.

Embodiment 3

[0031] Example 3: 10.9 mg of graphite carbon nitride and 109.1 mg of nickel ferrite were added into 20 ml of absolute anhydrous ethanol, stirred and dispersed for 12 hours, and then heat-treated in an oven at 150° C. for 8 hours to obtain the photocatalyst.

[0032] Take 50mg of the catalyst obtained in Example 3 and add it to 50ml of methylene blue (10mg / l), stir magnetically in a constant temperature water bath at 30°C and let in air, add hydrogen peroxide after dark reaction for 1 hour, and use a 300w lamp equipped with an ultraviolet filter A visible light source was used to irradiate the system, and 4 ml of the suspension was taken every 30 minutes and centrifuged to test the absorbance.

[0033] The graphene-like carbon nitride / nickel ferrite composite photocatalyst prepared by embodiment 3 has a degradation rate of 76% to methylene blue in 4 hours, as Figure 5 .

[0034] figure 1 For the X-ray diffraction spectrum of the graphite carbon nitride / nickel ferrite compos...

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Abstract

The invention relates to the field of photocatalysis, and specifically relates to a preparation method of a graphite-type carbon nitride composite nickel ferrite magnetic photocatalytic material. According to the invention, magnetic nickel ferrite is combined to graphite-type carbon nitride with a chemisorption method, wherein the mass ratio of graphite-type carbon nitride to nickel ferrite is 1:5-1:25. The synthesis method comprises the following steps: carbon nitride and nickel ferrite with a certain mass ratio are added into anhydrous ethanol, and are dispersed and stirred for a certain period of time; and heat treatment is carried out under a certain temperature. The catalyst provided by the invention has good magnetism, good dispersion and good stability. After 5 photo-degradation cyclic experiment, the catalyst can still maintain relatively high catalytic activity. Under visible light, the g-C3N4/NiFe2O4 can be excited to produce light-induced electrons and holes, and can be subjected to a light Fenton reaction with hydrogen peroxide, such that methylene blue high-efficiency degradation can be realized.

Description

technical field [0001] The invention belongs to the field of photocatalysis, in particular to a preparation method of a graphite-type carbon nitride composite nickel ferrite magnetic photocatalysis material. Background technique [0002] With the rapid economic development, the ecological and environmental problems brought about by industrial production are becoming more and more prominent. The discharge of waste water, waste residue and waste gas poses a huge threat to human living space and quality of life; following the sustainable development of energy conservation and emission reduction On the basis of creating new and efficient pollutant oxidation degradation technology and materials, it has become a necessary method to control environmental pollution, improve the greenhouse effect, and increase clean energy. Photocatalytic technology just has these advantages, degrades organic pollutants, reduces carbon dioxide, Detection and photolysis of water to produce hydrogen an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/30C02F1/72
Inventor 吉海燕许晖景小翠李华明徐远国夏杰祥徐丽
Owner 南通市金宏电化设备有限公司
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