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C/Co3O4/BiVO4 composite photo catalyst and preparation method and application thereof

A catalyst and composite light technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of easy loss, fine particles, difficult recycling, etc. Ease of recycling, good photochemical stability and magnetic effects

Inactive Publication Date: 2018-01-05
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the photocatalyst BiVO 4 Because it can improve the catalyst activity, it is widely used in composite catalysts, but due to its low photocatalytic efficiency and small particles, it is easy to lose during use and difficult to recycle.

Method used

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  • C/Co3O4/BiVO4 composite photo catalyst and preparation method and application thereof
  • C/Co3O4/BiVO4 composite photo catalyst and preparation method and application thereof
  • C/Co3O4/BiVO4 composite photo catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Nano Co 3 o 4 preparation of

[0027] 0.4mL ammonium solution (NH 3 ·H 2 O, 25%) was added to 25 mL of 1 mM cobalt acetate aqueous solution, followed by stirring for 15 minutes. The solution was then transferred to a 50 mL Teflon-lined stainless steel autoclave. The hydrothermal synthesis was performed at 150ºC for 3 hours. After the stainless steel autoclave was cooled to room temperature with running water, the obtained product was centrifuged, washed with ion-exchanged water and ethanol three times respectively, and finally, the obtained sample was dried in a drying oven at 80 ºC.

[0028] (2) Co. 3 o 4 / BiVO 4 preparation of

[0029] co 3 o 4 / BiVO 4 The material was prepared by EDTA-assisted hydrothermal method. In a typical synthesis, 10 mmol of Bi(NO 3 ) 3 ·5H 2 O was dissolved in 2M nitric acid to obtain solution A; meanwhile, 10 mmol of NH 4 VO 3 Dissolve in 2M sodium hydroxide solution, then add 2g of EDTA to form solution B; solution B...

Embodiment 2

[0033] (1) Nano Co 3 o 4 preparation of

[0034] 0.4mL ammonium solution (NH 3 ·H 2 O, 25% by weight) was added to 25 mL of 1 mM cobalt acetate aqueous solution, followed by stirring for 15 minutes. The solution was then transferred to a 50 mL Teflon-lined stainless steel autoclave. The hydrothermal synthesis was performed at 150ºC for 3 hours. After the stainless steel autoclave was cooled to room temperature with running water, the obtained product was centrifuged, washed with ion-exchanged water and ethanol three times respectively, and finally, the obtained sample was dried in a drying oven at 80 ºC.

[0035] (2) Co. 3 o 4 / BiVO 4 preparation of

[0036] co 3 o 4 / BiVO 4 The material was prepared by EDTA-assisted hydrothermal method. In a typical synthesis, 10 mmol of Bi(NO 3 ) 3 ·5H 2 O was dissolved in 2M nitric acid to obtain solution A. At the same time, 10 mmol of NH 4 VO 3 Dissolve in 2M sodium hydroxide solution, then add 2g of EDTA to form solu...

Embodiment 3

[0040] (1) Nano Co 3 o 4 preparation of

[0041] 0.4mL ammonium solution (NH 3 ·H 2 O, 25% by weight) was added to 25 mL of 1 mM cobalt acetate aqueous solution, followed by stirring for 15 minutes. The solution was then transferred to a 50 mL Teflon-lined stainless steel autoclave. The hydrothermal synthesis was performed at 150ºC for 3 hours. After the stainless steel autoclave was cooled to room temperature with running water, the obtained product was centrifuged, washed with ion-exchanged water and ethanol three times respectively, and finally, the obtained sample was dried in a drying oven at 80 ºC.

[0042] (2) Co. 3 o 4 / BiVO 4 preparation of

[0043] co 3 o 4 / BiVO 4 The material was prepared by EDTA-assisted hydrothermal method. In a typical synthesis, 10 mmol of Bi(NO 3 ) 3 ·5H 2 O was dissolved in 2M nitric acid to obtain solution A; meanwhile, 10 mmol of NH 4 VO 3 Dissolve in 2M sodium hydroxide solution, then add 2g of EDTA to form solution B; ...

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Abstract

The invention relates to a C / Co3O4 / BiVO4 composite photo catalyst and a preparation method and application thereof, and belongs to the technical field of preparation of environmental materials. The preparation method is characterized in that a hydrothermal method and a hydrolysis method are treated as the technological means for preparing the C / Co3O4 / BiVO4 composite photo catalyst; saccharomyceteis used for preparing a carbon material which has the characteristic of being capable of transferring electrons, and on that basis, the activity of the photo catalyst can be further improved, so thatthe purpose of efficiently degrading tetracycline in wastewater can be achieved; and moreover, the magnetic material Co3O4 is introduced to prepare the C / Co3O4 / BiVO4 composite photo catalyst, so thatthe cost is decreased, and the recycling performance of the photo catalyst is improved. With the adoption of the photo catalyst, the photo catalyzing activity is greatly improved, and moreover, the recycling rate is effectively increased; and the secondary environmental pollution of the photo catalyst in a solution can be avoided.

Description

technical field [0001] The present invention relates to a kind of C / Co 3 o 4 / BiVO 4 The composite photocatalyst and its preparation method and application belong to the technical field of environmental material preparation. Background technique [0002] Tetracycline antibiotics have good water solubility, and most of them are excreted in their original form after metabolism in the body, and finally enter the urban sewage treatment system, and various sewage treatment processes have no or little effect on these substances in sewage and are finally discharged to the environment Among them, they pose a potential threat to environmental pollution. They are not easy to biodegrade in the environment, so they are easy to store and accumulate in the aquatic environment. They have been frequently detected in surface water. Therefore, the removal of tetracycline in the environment is particularly important. [0003] Among the many methods of water pollution control, photocatalyti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/847C02F1/30C02F101/34C02F101/36C02F101/38
Inventor 赵晓旭李泽宇李万圆何昱昌季蓉张梦瀚王嘉慧依成武闫永胜
Owner JIANGSU UNIV
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