Preparation method and application of Fe3O4 quantum dot modified Bi2O4/g-C3N4 composite photocatalyst

A photocatalyst, g-c3n4 technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of low reaction active sites, photocatalyst current carrying Problems such as easy compounding, etc., to achieve the effect of excellent effect and easy operation

Inactive Publication Date: 2021-02-19
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the technical defects existing in the prior art, solve the problems of easy recombination of single photocatalyst carriers and low reactive sites, so that the degradation of pollutant rhodamine B is greatly improved

Method used

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  • Preparation method and application of Fe3O4 quantum dot modified Bi2O4/g-C3N4 composite photocatalyst
  • Preparation method and application of Fe3O4 quantum dot modified Bi2O4/g-C3N4 composite photocatalyst
  • Preparation method and application of Fe3O4 quantum dot modified Bi2O4/g-C3N4 composite photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] (1) g-C 3 N 4 Preparation of nanoflakes:

[0051] Take out 10g of urea and grind it into a crucible; put it into a muffle furnace at a constant temperature of 550°C and keep it for 4h with a heating rate of 5°C / min to obtain sample A; then, transfer sample A to a mortar and grind it into powder, put it in a muffle furnace The furnace was calcined twice under the same conditions to obtain g-C 3 N 4 Nanosheets.

[0052] (2) Bi 2 o 4 / g -C 3 N 4 Preparation of (Bi / CN) photocatalyst:

[0053] 0.1g g-C 3 N 4 and 0.131 g NaBiO 3 Add it into a beaker containing 60mL deionized water, stir vigorously at room temperature for 30min to obtain mixed solution B; then transfer solution B to a 100mL polytetrafluoroethylene stainless steel autoclave, keep the temperature at 160°C for 8h; finally use deionized water Wash the sample with ethanol, put it in a drying oven at 60°C, and dry it for 12 hours to obtain Bi 2 o 4 / g -C 3 N 4 Photocatalyst; 2 o 4 with g-C 3 N 4 ...

Embodiment 2

[0056] (1) g-C 3 N 4 Preparation of nanoflakes:

[0057] Take out 10g of urea and grind it into a crucible; put it into a muffle furnace at a constant temperature of 550°C and keep it for 4h with a heating rate of 5°C / min to obtain sample A; then, transfer sample A to a mortar and grind it into powder, put it in a muffle furnace The furnace was calcined twice under the same conditions to obtain g-C 3 N 4 Nanosheets.

[0058] (2) Bi 2 o 4 / g -C 3 N 4 Preparation of (Bi / CN) photocatalyst:

[0059] 0.1g g-C 3 N 4 and 0.131 g NaBiO 3 Add it into a beaker containing 60mL deionized water, stir vigorously at room temperature for 30min to obtain mixed solution B; then transfer solution B to a 100mL polytetrafluoroethylene stainless steel autoclave, keep the temperature at 160°C for 8h; finally use deionized water Wash the sample with ethanol, put it in a drying oven at 60°C, and dry it for 12 hours to obtain Bi 2 o 4 / g -C 3 N 4 Photocatalyst; 2 o 4 with g-C 3 N 4 ...

Embodiment 3

[0063] (1) g-C 3 N 4 Preparation of nanoflakes:

[0064] Take out 10g of urea and grind it into a crucible; put it into a muffle furnace at a constant temperature of 550°C and keep it for 4h with a heating rate of 5°C / min to obtain sample A; then, transfer sample A to a mortar and grind it into powder, put it in a muffle furnace The furnace was calcined twice under the same conditions to obtain g-C 3 N 4 Nanosheets.

[0065] (2) Bi 2 o 4 / g -C 3 N 4 Preparation of (Bi / CN) photocatalyst:

[0066] 0.1g g-C 3 N 4 and 0.131 g NaBiO 3 Add it into a beaker containing 60mL deionized water, stir vigorously at room temperature for 30min to obtain mixed solution B; then transfer solution B to a 100mL polytetrafluoroethylene stainless steel autoclave, keep the temperature at 160°C for 8h; finally use deionized water Wash the sample with ethanol, put it in a drying oven at 60°C, and dry it for 12 hours to obtain Bi 2 o 4 / g -C 3 N 4 Photocatalyst; 2 o 4 with g-C 3 N 4 ...

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Abstract

The invention belongs to the technical field of environmental material preparation, and relates to a preparation method and application of a Fe3O4 quantum dot modified Bi2O4 / g-C3N4 composite photocatalyst. The preparation method comprises the following steps of: firstly, preparing g-C3N4 nanosheets and Bi / CN; dissolving a Bi / CN photocatalyst in deionized water, then adding FeCl3.6H2O and FeCl2.4H2O, stirring at the temperature of 60-80 DEG C, then dropwise adding NH3.H2O, and stirring again; and after stirring, collecting a sample by using a magnet, cleaning the sample by using deionized waterand ethanol, and drying the sample to obtain the composite photocatalyst. According to the invention, g-C3N4 and Bi2O4 are adopted, visible light is used for excitation, and through interface interaction with organic pollutant molecules, surrounding oxygen and water molecules are excited into free negative ions with extremely high oxidizing power, so that the purpose of degrading harmful organicsubstances is achieved, and the method is a green, environment-friendly, efficient and stable treatment technology.

Description

technical field [0001] The invention belongs to the technical field of environmental material preparation, in particular to a Fe 3 o 4 Quantum dot modified Bi 2 o 4 / g -C 3 N 4 Preparation method and application of composite photocatalyst. Background technique [0002] In recent years, the world has been very concerned about the deterioration of environmental quality and the imbalance of ecological balance. Human beings are facing the most serious environmental crisis in history. In environmental pollution, most are directly related to the pollution of industry and industrial products. Dye wastewater is one of the main harmful industrial wastewater, which mainly comes from the production industry of dyes and dye intermediates. There are many kinds of dyes, which bring brilliant and colorful colors to people's life and generate huge economic benefits, but also produce a large amount of dye wastewater discharged into the environmental water body, resulting in the pollut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J23/18B01J35/00C02F1/30C02F101/30
CPCB01J27/24B01J23/18B01J35/004B01J35/0033C02F1/30C02F2305/10C02F2101/308
Inventor 孟凡影秦莹莹卢健李春香闫永胜
Owner JIANGSU UNIV
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