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Zinc oxide-based photocatalyst material co-doped with boron and fluorine and its preparation method and application

A photocatalyst and co-doping technology, used in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., to avoid a large amount of oxidation loss, reduce equipment requirements and energy consumption requirements.

Active Publication Date: 2017-03-15
杭州大岸科技有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The object of the present invention is to provide a zinc oxide-based photocatalyst material co-doped with boron and fluorine and its preparation method and application. By introducing boron and fluorine elements into the zinc oxide crystal, the visible light emission of the zinc oxide-based photocatalyst material is realized. In response, the prepared boron and fluorine co-doped zinc oxide-based photocatalyst material has good organic dye degradation performance under visible light irradiation, and can be directly applied to solve the problems of photocatalytic degradation of organic pollutants in water and efficient utilization of solar energy , especially the existing wide-bandgap semiconductor photocatalyst materials for visible light photocatalytic applications

Method used

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  • Zinc oxide-based photocatalyst material co-doped with boron and fluorine and its preparation method and application
  • Zinc oxide-based photocatalyst material co-doped with boron and fluorine and its preparation method and application
  • Zinc oxide-based photocatalyst material co-doped with boron and fluorine and its preparation method and application

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Embodiment 1

[0031] The process flow of this embodiment is as follows: a zinc oxide-based photocatalyst material co-doped with boron and fluorine is obtained through hydrolysis precipitation—washing and drying—peroxidation treatment—washing and drying—reduction treatment. details as follows:

[0032] 1) Hydrolysis and precipitation: First, dissolve ammonium acetate in water, configure 40mmol / L ammonium acetate solution, then add zinc fluoride borate to the solution, the concentration of zinc fluoride borate in the solution is 10mmol / L, violently Stir until a homogeneous solution is formed, and finally, transfer the homogeneous solution into a reaction kettle, and keep it warm at 200°C for 1 hour;

[0033] 2) Washing and drying: Centrifuge the suspension obtained in step 1) to collect the powder, alternately wash it with secondary deionized water and absolute ethanol for 5 times, put it in a drying oven and dry it at 50°C for one day;

[0034] 3) Peroxidation treatment: disperse the powder...

Embodiment 2

[0038] The process flow of this embodiment is as follows: a zinc oxide-based photocatalyst material co-doped with boron and fluorine is obtained through hydrolysis precipitation—washing and drying—peroxidation treatment—washing and drying—reduction treatment. details as follows:

[0039] 1) Hydrolysis precipitation: First, dissolve ammonium acetate in 1,4-butanediol, configure a 40mmol / L ammonium acetate solution, then add zinc borofluorate to the solution, the amount of zinc borofluorate in the solution The concentration is 10mmol / L, stir vigorously until a homogeneous solution is formed, and finally, transfer the homogeneous solution into the reaction kettle, and keep it at 200°C for 20h;

[0040] 2) Washing and drying: Centrifuge the suspension obtained in step 1) to collect the powder, alternately wash it with secondary deionized water and absolute ethanol for 8 times, put it in a drying oven and dry it at 50°C for one day;

[0041] 3) Peroxidation treatment: disperse the...

Embodiment 3

[0045] The boron and fluorine co-doped zinc oxide-based photocatalyst material obtained in Examples 1 and 2 were used for the photocatalytic degradation of methylene blue, and the experimental process was as follows:

[0046] Weigh 100 mg of the obtained boron and fluorine co-doped zinc oxide-based photocatalyst material, disperse it in 100 ml of methylene blue solution with a concentration of 6 ppm in the dark, and place it at a light intensity of about 60 mW / cm 2 Under visible light irradiation (wavelength range 400nm ~ 700nm), samples were taken at regular intervals, centrifuged and the residual methylene blue concentration of the supernatant was measured to obtain the photocatalytic degradation curve of the material under visible light irradiation. In addition, the materials were dispersed in the methylene blue solution of the same concentration in the same proportion, placed in the dark, and points were taken at the same time intervals to obtain the adsorption curve in the...

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Abstract

The invention discloses a boron and fluorine co-doped zinc oxide based photocatalyt material and a preparation method and application thereof, and belongs to the technical fields of inorganic nonmetallic material preparation, environment protection techniques and solar energy utilization. According to the photocatalyst material, boron and fluorine elements are doped in a zinc oxide crystal successfully by the technological process of hydrolytic precipitation, washing and drying, peroxidation treatment, washing and drying, and reduction treatment, and further the visible light response of the zinc oxide based photocatalyst material is realized; the boron and fluorine co-doped zinc oxide based photocatalyt material has good organic dye degrading performance under the irradiation of visible light, can be directly applied to photocatalytic degradation of organic pollutants in water and efficient utilization of solar energy, and especially can be used for overcoming the difficulty of optical catalysis application of visible light of an existing wide bandgap semiconductor photocatalyst material.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic non-metallic nanometer materials and water purification environment protection, and specifically relates to a zinc oxide-based photocatalyst material co-doped with boron and fluorine, and a preparation method and application thereof. Background technique [0002] Energy crisis and environmental pollution are two major problems faced by human beings in today's era. Photocatalytic technology can oxidize and mineralize almost any organic molecule into carbon dioxide and inorganic ions because it can effectively use solar energy, and degrade organic pollutants in water. The elimination of microorganisms such as bacteria and viruses in water has received widespread attention. Among the numerous photocatalysts, some n-type semiconductors with wide bandgap such as titanium dioxide, zinc oxide, and tin oxide are widely used in photolysis of water to produce hydrogen, fields such as solar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/138C02F1/30C02F101/30C02F103/30
Inventor 李琦尚建库杨炜沂
Owner 杭州大岸科技有限公司
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