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A preparation method of bismuth oxyfluoride/graphene composite visible light catalyst

A graphene composite and bismuth oxyfluoride technology, which is applied in the direction of light water/sewage treatment, energy wastewater treatment, etc., can solve the problems of no discovery, etc., and achieve the effects of stable performance, strong market application prospects, and wide absorption spectrum range

Inactive Publication Date: 2016-09-21
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no report on the preparation method of bismuth oxyfluoride / graphene composite visible light catalyst in the literature

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  • A preparation method of bismuth oxyfluoride/graphene composite visible light catalyst

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Effect test

Embodiment 1

[0014] 2.5mmol Bi(NO 3 ) 3 ∙5H 2 O was added to 20 mL ethylene glycol, and until it was completely dissolved, solution X was obtained; 2.5 mmol NaF was dissolved in 20 mL ethylene glycol, and solution Y was obtained after it was completely dissolved; solution X and solution Y were mixed dropwise (approx. 2mL / min) by adding 100mL deionized water to obtain a white precipitate, which was filtered, washed with deionized water and ethanol three times each, and the filtered product was dried in a constant temperature drying oven at 80°C for 5h, and then kept at 300°C for 2h to obtain A spherical bismuth oxyfluoride photocatalyst with a particle size of 800nm. The RhB removal rate of Rhodamine B dye wastewater was degraded under natural sunlight for 8 hours was 50%.

Embodiment 2

[0016] 2.5mmol Bi(NO 3 ) 3 ∙5H 2 O was added to 20 mL ethylene glycol, and until it was completely dissolved, solution X was obtained; 2.5 mmol NaF was dissolved in 20 mL ethylene glycol, and solution Y was obtained after it was completely dissolved; solution X and solution Y were mixed dropwise (approx. 2mL / min) by adding 100mL deionized water to obtain a white precipitate, which was filtered, washed with deionized water and ethanol three times each, and the filtered product was dried in a constant temperature drying oven at 80°C for 5h, and then kept at 300°C for 2h to obtain Spherical bismuth oxyfluoride with a particle size of 800nm; add 1.52mg of graphene oxide into 50mL of deionized water, ultrasonically disperse for 60min to form a graphene oxide aqueous solution, add 2.5mmol spherical bismuth oxyfluoride to the graphene oxide aqueous solution, and continue to Stir for 2 hours; then transfer to a constant temperature water bath, add 0.025mL hydrazine hydrate, reduce t...

Embodiment 3

[0018] 2.5mmol Bi(NO 3 ) 3 ∙5H 2 O was added to 20 mL ethylene glycol, and until it was completely dissolved, solution X was obtained; 2.5 mmol NaF was dissolved in 20 mL ethylene glycol, and solution Y was obtained after it was completely dissolved; solution X and solution Y were mixed dropwise (approx. 2mL / min) by adding 100mL deionized water to obtain a white precipitate, which was filtered, washed with deionized water and ethanol three times each, and the filtered product was dried in a constant temperature drying oven at 80°C for 5h, and then kept at 300°C for 2h to obtain Spherical bismuth oxyfluoride with a particle size of 800nm; add 3.05mg of graphene oxide into 50mL of deionized water, ultrasonically disperse for 60min to form a graphene oxide aqueous solution, add 2.5mmol spherical bismuth oxyfluoride to the graphene oxide aqueous solution, and continue to Stir for 2 hours; then transfer to a constant temperature water bath, add 0.05mL hydrazine hydrate, reduce th...

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Abstract

The invention discloses a preparation method of bismuth oxyfluoride / graphene composite visible light catalyst. The main points of the technical scheme of the present invention are: configure Bi(NO 3 ) 3 ∙5H 2 The ethylene glycol solution of O and the ethylene glycol solution of NaF were mixed, and 100 mL of deionized water was added dropwise to obtain a white precipitate, which was dried by suction filtration and kept at 300°C for 2 hours to obtain spherical bismuth oxyfluoride with a particle size of 800 nm. Disperse graphene oxide in deionized water, add spherical bismuth oxyfluoride to the graphene oxide aqueous solution, add hydrazine hydrate, and reduce to polymer precipitation in a water bath at 80°C. The solution becomes clear. After the reaction, the solution is naturally cooled to room temperature and filtered. , washed with deionized water and ethanol three times respectively, and dried at 80°C in a constant temperature drying oven to prepare a bismuth oxyfluoride / graphene composite visible light catalyst. The bismuth oxyfluoride / graphene composite visible light catalyst prepared by the invention has the advantages of wide absorption spectrum range, stable performance, non-toxicity, high efficiency and low cost, and can be applied to the degradation of refractory organic pollutants.

Description

technical field [0001] The invention belongs to the technical field of visible light catalytic materials, and in particular relates to a preparation method of a bismuth oxyfluoride / graphene composite visible light catalyst capable of efficiently degrading rhodamine B dye wastewater. Background technique [0002] Dye wastewater is one of the typical refractory biodegradable organic wastewater, which contains high organic content, most of which also contain carcinogens such as benzene rings, amine groups, azo groups, etc., and the removal effect of conventional biological treatment is not ideal. [0003] Nano-semiconductor photocatalytic oxidation technology uses semiconductor oxide materials to react with light to generate highly active hydroxyl radicals to oxidize and decompose organic pollutants in water bodies. Hydroxyl radicals have strong oxidation ability and no selectivity, which can make absolute Most organic pollutants are rapidly oxidized and decomposed, and eventua...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/06C02F1/30
CPCY02W10/37
Inventor 孙剑辉胡莉敏董淑英皮运清冯精兰孙靖宇李琦路李怡帆张春燕
Owner HENAN NORMAL UNIV
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