Nano CuO/GO/BiVO4 heterogeneous heterojunction photocatalyst as well as preparation method and application thereof

A photocatalyst and nanotechnology, applied in nanometer CuO/GO/BiVO4 heterojunction photocatalyst, photocatalyst field, can solve the problem of high recombination rate of photogenerated electrons and holes, limited solar energy utilization efficiency, reduced photocatalytic efficiency, etc. It can improve the photocatalytic activity, facilitate the transfer of photogenerated electrons or holes, and improve the photocatalytic efficiency.

Pending Publication Date: 2021-10-29
TAIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The core of photocatalytic technology is semiconductor material. Among many semiconductor materials, TiO 2 Common semiconductor photocatalysts such as ZnO and ZnO have wide band gaps and absorb light only in the ultraviolet region, thus greatly limiting the utilization efficiency of solar energy; and photocatalysts that respond well to visible light such as CdS, CdSe, etc. exist Serious photocorrosion phenomenon and other problems
Moreover, semiconductor photocatalysts have a high recombination rate of photogenerated electrons and holes during the catalytic reaction, which greatly reduces their photocatalytic efficiency.

Method used

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  • Nano CuO/GO/BiVO4 heterogeneous heterojunction photocatalyst as well as preparation method and application thereof
  • Nano CuO/GO/BiVO4 heterogeneous heterojunction photocatalyst as well as preparation method and application thereof
  • Nano CuO/GO/BiVO4 heterogeneous heterojunction photocatalyst as well as preparation method and application thereof

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preparation example Construction

[0020] The embodiment of the present invention provides a nano CuO / GO / BiVO 4 A method for preparing a multi-phase heterojunction photocatalyst, the preparation method comprising the following steps:

[0021] (1) dispersion liquid A is provided, and described dispersion liquid A comprises graphene oxide, dispersant and solvent, and described solvent comprises the mixture of ethanol and water;

[0022] (2) Dissolve bismuth nitrate in dilute nitric acid to form a bismuth nitrate solution, then add the bismuth nitrate solution dropwise to the dispersion A, mix evenly after the addition is complete, heat the mixed solution to 90-110°C, and Slowly add NH 4 VO 3 After the addition of the ammonia solution, continue the ultrasonic reaction for 18-24 hours, keep the pH value of the mixed solution at 4-7, and after the reaction is complete, quickly cool the mixed solution to room temperature, then filter, wash, and dry to obtain product B;

[0023] (3) Add product B into water, first ...

Embodiment 1

[0047] Embodiment 1 A kind of nanometer CuO / GO / BiVO 4 The preparation process of the heterogeneous junction photocatalyst specifically includes the following steps:

[0048] (1) Dissolve 30g of graphene oxide in 10mL of ethanol first, then add 0.5g (octadecyldimethylhydroxyethylammonium nitrate: Tween 80 = 1:1) compound dispersant, ultrasonically disperse for 20min, Add 60mL of water to dilute evenly to obtain dispersion A.

[0049] (2) Prepare 1mol / L Bi(NO) with 6mol / L dilute nitric acid 3 ) 3 ·5H 2 O solution, take 20mL of the solution, add it dropwise to the above dispersion A while stirring, mix well after the dropwise addition, heat the solution to 90°C, and slowly add 0.01mol of NH 4 VO 3 After adding the prepared 20wt% ammonia solution, continue the ultrasonic reaction for 18 hours to keep the pH value of the solution at 5. After the reaction is complete, the solution is rapidly cooled to room temperature, then filtered and washed, and the product is dried to obtai...

Embodiment 2

[0052] Embodiment 2 A kind of nanometer CuO / GO / BiVO 4 The preparation process of the heterogeneous junction photocatalyst specifically includes the following steps:

[0053] (1) Dissolve 60g of graphene oxide in 20mL of ethanol first, then add 2g (hexadecyltrimethylammonium bromide: Tween 80 = 2:1) compound dispersant, ultrasonically disperse for 30min, then add 20mL of water Dilute evenly to obtain dispersion A.

[0054] (2) Prepare 0.5mol / L Bi(NO) with 6mol / L dilute nitric acid 3 ) 3 ·5H 2 O solution, take 50mL of the solution, add it dropwise to the above dispersion A while stirring, mix evenly after the dropwise addition, heat the solution to 100°C, and slowly add 0.025mol of NH 4 VO 3 After adding the prepared 35wt% ammonia solution, continue the ultrasonic reaction for 24 hours to keep the pH value of the solution at 6. After the reaction is complete, the solution is rapidly cooled to room temperature, then filtered and washed, and the product is dried to obtain B. ...

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Abstract

The invention discloses a nano CuO/GO/BiVO4 heterogeneous heterojunction photocatalyst as well as a preparation method and application of the nano CuO/GO/BiVO4 heterogeneous heterojunction photocatalyst. The preparation method comprises the step of loading CuO and graphene oxide (GO) on the surface of BiVO4 to prepare the photocatalyst, and the photocatalyst is an environment-friendly photocatalytic material. The heterogeneous heterojunction photocatalyst has excellent photocatalytic activity, can well absorb ultraviolet light, visible light and the like, is simple in preparation process and has good industrial application prospects, for example, the effect is good when the heterogeneous heterojunction photocatalyst is applied to wastewater treatment with rhodamine B as a main pollutant.

Description

technical field [0001] The invention relates to a photocatalyst, in particular to a nanometer CuO / GO / BiVO 4 The multi-phase heterojunction photocatalyst, its preparation method and application belong to the technical field of environmental protection photocatalysis. Background technique [0002] In 1972, Fujishima A et al. reported the use of TiO 2 The photoelectrode and platinum electrode form a photoelectrochemical system to split water into hydrogen and oxygen, thus opening up a new field of semiconductor photocatalysis. The purpose of the initial research on semiconductor photocatalysis is to realize the conversion of photoelectrochemical solar energy. With the continuous advancement of science and technology and the increasingly serious environmental pollution problems, the focus of photochemical research has gradually shifted to the field of environmental photocatalysis, making photocatalysis technology in the field of environmental protection. The application of it ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18B01J23/22B01J23/72B01J23/847B01J35/00C02F1/30C02F101/30
CPCB01J35/004B01J21/18B01J23/72B01J23/22B01J23/8472C02F1/30C02F2305/10C02F2101/308
Inventor 徐爱娇钟文武杜达敏
Owner TAIZHOU UNIV
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