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CdS/Fe3O4/C3N4 composite photocatalyst as well as preparation method and use thereof

A composite light and catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the loss of treatment effect, loss of sensitivity and drug resistance of pathogenic microorganisms Enhancement and other issues, to achieve the effects of good photocatalytic activity and stability, convenient separation and recovery, and high degradation rate

Inactive Publication Date: 2017-08-15
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The enhancement of drug resistance has made most antibiotics lose their sensitivity to pathogenic microorganisms and lose their effectiveness in treating diseases

Method used

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  • CdS/Fe3O4/C3N4 composite photocatalyst as well as preparation method and use thereof
  • CdS/Fe3O4/C3N4 composite photocatalyst as well as preparation method and use thereof
  • CdS/Fe3O4/C3N4 composite photocatalyst as well as preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Step 1, g-C 3 N 4 Preparation: Take 3g of purchased melamine, place it in a crucible, and place it in a muffle furnace, and calcine it in an air atmosphere at 2°C min -1 Raise the temperature to 500°C at a constant temperature for 2 hours, continue to raise the temperature to 550°C at the same rate, and keep it at a constant temperature for 2 hours, cool naturally to room temperature and grind finely to obtain g-C 3 N 4 catalyst of light.

[0027] Step 2, prepare Fe 3 o 4 / g -C 3 N 4 : put g-C 3 N 4 Dispersed in ethylene glycol and sonicated to make g-C 3 N 4 suspension; the Fe(NO 3 ) 3 9H 2 O, PVP, PEG, and CH 3 COONa·3H 2 O dissolved in the above g-C respectively 3 N 4 in the suspension; continue to sonicate the above mixture until it is fully dissolved, then transfer the reaction mixture to a 50mL polytetrafluoroethylene reactor for constant temperature and heat reaction for a period of time; finally, the obtained precipitate Fe 3 o 4 / g -C 3 N 4...

Embodiment 2

[0032] In step 1, the calcination method is to maintain a constant temperature at 500°C for 2 hours in the first stage, and the calcination method in the second stage is to maintain a constant temperature at 550°C for 2 hours, and the heating rate is 10°C / min.

[0033] In step 2, the g-C 3 N 4 , ethylene glycol, Fe(NO 3 ) 3 9H 2 O, PVP, PEG, and CH 3 COONa·3H 2 The amount of O used is 2.0g, 30mL, 0.1g, 0.008g, 0.4g, 0.8g in sequence; the temperature of the solvothermal reaction is 220°C, and the reaction time is 10h.

[0034] In step 3, the Fe 3 o 4 / g -C 3 N 4 , cadmium sulfate, thiourea, PVP, and deionized water are used in the order of 0.3g, 2.1g, 0.05-0.2g, 0.09g, and 150mL; the temperature of the solvothermal reaction is 80°C, and the reaction is 3h.

[0035] Step 4, take 0.05g of CdS / Fe in step 3 3 o 4 / g -C 3 N 4 Added to 100mL containing 20mg L -1 In the reactor of tetracycline solution, stir in the dark at 30°C to achieve adsorption equilibrium; turn on...

Embodiment 3

[0037] In step 1, the calcination method is to maintain a constant temperature at 500°C for 2 hours in the first stage, and the calcination method in the second stage is to maintain a constant temperature at 550°C for 2 hours, and the heating rate of the first stage calcination and the second stage calcination are both 6°C / min.

[0038] In step 2, the g-C 3 N 4 , ethylene glycol, Fe(NO 3 ) 3 9H 2 O, PVP, PEG, and CH 3 COONa·3H 2 The amount of O used was 1 g, 20 mL, 0.08 g, 0.006 g, 0.3 g, and 0.4 g in sequence; the temperature of the solvothermal reaction was 200° C., and the reaction time was 12 h.

[0039] In step 3, the Fe 3 o 4 / g -C 3 N 4 , cadmium sulfate, thiourea, PVP, and deionized water are used in the order of 0.2g, 1.5g, 1g, 0.05g, and 80mL; the temperature of the solvothermal reaction is 70°C, and the reaction is 5h.

[0040] Step 4, take 0.05g of CdS / Fe in step 3 3 o 4 / g -C 3 N 4 Added to 100mL containing 20mg L -1 In the reactor of tetracycline so...

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PUM

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Abstract

The invention provides a CdS / Fe3O4 / C3N4 composite photocatalyst as well as a preparation method and use thereof. The preparation method comprises the following steps: 1, preparing g-C3N4; 2, preparing a Fe3O4 / g-C3N4 magnetic composite material; 3, preparing the CdS / Fe3O4 / g-C3N4 composite photocatalyst. The CdS / Fe3O4 / g-C3N4 composite photocatalyst prepared by the method is more convenient, faster and efficient to separate and recycle; the CdS / Fe3O4 / g-C3N4 composite photocatalyst has better photocatalytic activity and stability.

Description

technical field [0001] The invention belongs to the technical field of environmental material preparation, in particular to a carbon nitride-based multi-element CdS / Fe 3 o 4 / C 3 N 4 The preparation method of the composite photocatalyst The preparation method and application of the composite photocatalyst. Background technique [0002] Among the many antibiotics, tetracycline antibiotics are one of the most widely used antibiotics in the world. It is used to treat various diseases due to its antibacterial effect, and is used as a growth promoter for livestock and poultry in livestock and poultry and aquaculture. Studies have shown that, whether human or veterinary antibiotics enter the animal or human body, about 70% cannot be absorbed, but are directly excreted into the environment in the form of parent compounds, posing a potential threat to human health and ecosystems. threaten. The main performances are as follows: First: leading to the enhancement of drug resistan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/30C02F101/38
CPCC02F1/30B01J27/24C02F2101/38C02F2305/10B01J35/39
Inventor 朱志唐旭于洋逯子扬王友山霍鹏伟闫永胜李春香
Owner JIANGSU UNIV
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