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A kind of preparation method of magnetic biobr with ultraviolet-visible light response

A visible light and magnetic technology, applied in the fields of environmental catalysis and material chemistry, can solve the problems of high cost, limited industrialization and application, difficult recycling, etc., and achieve the effects of easy control of conditions, easy industrial expansion and application, and simple preparation process.

Active Publication Date: 2017-07-28
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, powder photocatalysts generally have the problem of difficult recovery. Although they can be separated by centrifugation and filtration, the cost is high, which limits their industrial application. The insolubility and magnetic properties of magnetic nanocatalysts make it possible to quickly It is effectively separated from the reaction solution, while retaining the advantages of large specific surface area and high catalytic activity of the nano-catalyst, which can realize the recycling of the catalyst and has broad application prospects

Method used

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  • A kind of preparation method of magnetic biobr with ultraviolet-visible light response
  • A kind of preparation method of magnetic biobr with ultraviolet-visible light response
  • A kind of preparation method of magnetic biobr with ultraviolet-visible light response

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Experimental program
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Effect test

Embodiment 1

[0020] Embodiment 1 (with rhamnolipid, Fe 3 o 4 example):

[0021] (1) Preparation of surfactant-modified magnetic nanoparticles:

[0022] 1g of Fe 3 o 4 Disperse ultrasonically in an aqueous solution containing 0.1 g rhamnolipid, stir mechanically at room temperature for 4 hours, apply a magnetic field to separate the product, wash with ultrapure water and ethanol, and dry at 60°C to obtain rhamnolipid-modified magnetic nanoparticles.

[0023] (2) Improved solvothermal method to prepare magnetic BiOBr microspheres with UV-visible light response:

[0024] The rhamnolipid-modified magnetic nanoparticles that step (1) obtains are ultrasonically dispersed in ethylene glycol solvent, add 1.5g cetyltrimethylammonium bromide and stir well, add dropwise In 25mL of ethylene glycol containing bismuth nitrate in water, keep stirring and place it at 100°C for 10 hours of constant temperature reaction, then apply a magnetic field to separate the product, then wash it with ultrapure ...

Embodiment 2

[0027] Embodiment 2 (with rhamnolipid, Fe 3 o 4 example):

[0028] (1) Preparation of surfactant-modified magnetic nanoparticles:

[0029] 1g of Fe 3 o 4 Disperse ultrasonically in an aqueous solution containing 0.025 g of rhamnolipid, stir mechanically at room temperature for 16 hours, apply a magnetic field to separate the product, wash with ultrapure water and ethanol, and dry at 70°C to obtain rhamnolipid-modified magnetic nanoparticles.

[0030] (2) Improved solvothermal method to prepare magnetic BiOBr microspheres with UV-visible light response:

[0031]The rhamnolipid-modified magnetic nanoparticles that step (1) obtains are ultrasonically dispersed in ethylene glycol solvent, add 1.5g cetyltrimethylammonium bromide and stir well, add dropwise In 25mL of ethylene glycol containing bismuth nitrate in water, keep stirring and place it at 140°C for 6 hours, then apply a magnetic field to separate the product, then wash it with ultrapure water and ethanol, and dry it...

Embodiment 3

[0033] Embodiment 3 (with rhamnolipid, Fe 3 o 4 example):

[0034] (1) Preparation of surfactant-modified magnetic nanoparticles:

[0035] 1g of Fe 3 o 4 Ultrasonic dispersion in an aqueous solution of 0.025 g of rhamnolipids, mechanically stirring at room temperature for 10 h, applying a magnetic field to separate the product, cleaning with ultrapure water and ethanol, and drying at 80 ° C to obtain rhamnolipid-modified magnetic nanoparticles.

[0036] (2) Improved solvothermal method to prepare magnetic BiOBr microspheres with UV-visible light response:

[0037] The rhamnolipid-modified magnetic nanoparticles obtained in step (1) are ultrasonically dispersed in an ethanol solvent, 1g of cetyltrimethylammonium bromide is added and stirred evenly, and 1g of bismuth nitrate pentahydrate is added dropwise. In 25mL of ethanol, continuously stirred and placed at 120 °C for 5 h at a constant temperature, the product was separated by an external magnetic field, washed with ult...

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Abstract

The invention relates to a method for preparing magnetic BiOBr with ultraviolet-visible light response. The method comprises the following steps: ultrasonically dispersing magnetic nano-particles in ultrapure water, adding a surfactant, stirring at room temperature for 4-16 hours, separating a product in an applied magnetic field, cleaning by using ultrapure water and ethanol, drying at the temperature of 60-80 DEG C, thereby obtaining surfactant-modified magnetic nano-particles; adding hexadecyl trimethyl ammonium bromide, uniformly stirring, dropwise adding an alcohol solvent dissolved with bismuth nitrate pentahydrate, continuously stirring, reacting at the constant temperature of 100-150 DEG C for 5-10 hours, separating the product in an applied magnetic field, cleaning by using ultrapure water and ethanol, drying at the temperature of 60-80 DEG C, thereby obtaining the magnetic BiOBr microspheres with core-shell structures. According to the method disclosed by the invention, the preparation process is simple, high-pressure conditions are not needed, the conditions are easily controlled and are mild, and industrial expanded application is conveniently realized; and moreover, the prepared magnetic BiOBr refers to microspheres of three-dimensional structures, and the catalytic activity is high.

Description

technical field [0001] The invention belongs to the field of environmental catalysis and material chemistry, and in particular relates to a preparation method of magnetic BiOBr with ultraviolet-visible light response. Background technique [0002] Plasma technology has the ability to produce active substances with strong oxidizing ability (such as OH, O 3 、H 2 o 2 etc.) and other characteristics, degrade various pollutants in the water body, and even mineralize the pollutants into CO 2 、H 2 O, and the discharge process will be accompanied by the generation of light radiation and ultrasonic waves. However, the light radiation produced in the plasma discharge process has not been utilized, and the wavelength of this part of the light radiation spans the visible light to the ultraviolet light region (Wang Huijuan, Li Jie, Quan Xie, et al. Formation of hydrogen peroxide and degradation of phenol in synergistic system of pulsed corona discharge combined with TiO 2 photocata...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/08C02F1/30C02F1/32
Inventor 喻泽斌王莉胡晓彭振波吕保玉
Owner GUANGXI UNIV