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Preparation method of quaternary visible light catalysis nano composite material

A nano-composite material, visible light technology, applied in the field of photocatalytic materials, can solve the problem of low photocatalytic efficiency, and achieve the effect of improving the reaction rate, accelerating crystal crystallization, and prolonging the life.

Active Publication Date: 2020-05-19
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This will inevitably make the photocatalytic efficiency of ZnS lower under sunlight

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  • Preparation method of quaternary visible light catalysis nano composite material
  • Preparation method of quaternary visible light catalysis nano composite material
  • Preparation method of quaternary visible light catalysis nano composite material

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[0029] A method for preparing a quaternary visible light-catalyzed nanocomposite material, specifically comprising the following steps:

[0030] (1) Evenly disperse copper oxide and zinc sulfide with a mass ratio of 1:1~4 in deionized water to form a mixed solution;

[0031] (2) Put the mixed solution obtained in step (1) in a microwave reactor, react with microwave irradiation, cool to room temperature, filter, wash and dry to obtain CuO / CuS / ZnO / ZnS quaternary visible photocatalytic nanocomposites.

[0032]Here, copper oxide is dispersed first, and then zinc sulfide is added for dispersion, because copper oxide is in the form of flakes, rods, wires, etc., while zinc sulfide has a spherical structure. Relatively speaking, copper oxide is difficult to disperse, and sulfide Zinc is easy to disperse, so copper oxide is added first, and then zinc sulfide is added, which can effectively ensure that zinc sulfide is fully mixed with copper oxide, and avoid copper oxide dispersion th...

Embodiment 1

[0052] (1) Preparation of zinc sulfide: Dissolve 0.2195g of zinc acetate and 0.3005g of thioacetamide in 40mL of deionized water to prepare precursor solution A. The molar ratio of zinc acetate to thioacetamide is 1:4, and then Precursor solution A was placed in a microwave reactor and irradiated at a power of 130W for 9 minutes. After the reaction was completed, it was cooled to room temperature and left to stand overnight. The precipitate was filtered, washed three times with deionized water and absolute ethanol, and dried for 12 hours. That is, white ZnS is obtained;

[0053] (2) Preparation of copper oxide: Dissolve 0.2500g copper sulfate and 0.1600g sodium hydroxide in 40mL deionized water to prepare precursor solution B. The molar ratio of copper sulfate and sodium hydroxide is 1:4, and then the precursor solution B is placed in a microwave reactor, set the power to 260W, and irradiated by microwave for 12min. After the reaction, cool naturally to room temperature, filte...

Embodiment 2

[0059] (1) Preparation of zinc sulfide: Dissolve 0.2195g of zinc acetate and 0.2254g of thioacetamide in 40mL of deionized water to prepare precursor solution A. The molar ratio of zinc acetate to thioacetamide is 1:3, and then Precursor solution A was placed in a microwave reactor and irradiated at a power of 390W for 5 minutes. After the reaction was completed, it was cooled to room temperature and left to stand overnight. The precipitate was filtered, washed three times with deionized water and absolute ethanol, and dried for 12 hours. White ZnS can be obtained;

[0060] (2) Preparation of copper oxide: Dissolve 0.2500g of copper sulfate and 0.1200g of sodium hydroxide in 40mL of deionized water to prepare precursor solution B. The molar ratio of copper sulfate and sodium hydroxide is 1:3, and then the precursor solution B is placed in a microwave reactor, set the power to 130W, irradiated for 15min, naturally cooled to room temperature after the reaction, filtered the blac...

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Abstract

The invention discloses a preparation method of a quaternary visible light catalysis nano composite material. The preparation method specifically comprises the following steps: (1) uniformly dispersing copper oxide and zinc sulfide in a mass ratio of 1: (1-4) in deionized water to form a mixed solution; and (2) putting the mixed solution obtained in the step (1) into a microwave reactor, carryingout microwave irradiation reaction, cooling to room temperature, and carrying out filtering, washing and drying to obtain the CuO / CuS / ZnO / ZnS quaternary visible light catalysis nano composite material. The obtained CuO / CuS / ZnO / ZnS quaternary visible light catalysis nano composite material has relatively high photocatalytic efficiency under visible light. The preparation method is simple in process, simple and convenient to operate, good in repeatability, clean in process and environment-friendly, and no surfactant or organic solvent is used as a template.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, and in particular relates to a preparation method of a quaternary visible light catalytic nanocomposite material. Background technique [0002] As one of the earliest semiconductors used for photocatalysis, zinc sulfide (ZnS) can quickly generate carriers under photoexcitation, and the negative reduction potential of photogenerated electrons is high, and the conduction band position in aqueous solution is also high. It shows absolute advantages in degrading water pollutants. However, the biggest defect of ZnS is the rapid combination of photogenerated electrons and holes, which shortens the lifetime of carriers and reduces the photocatalytic activity of ZnS. In addition, due to the wide energy gap of ZnS itself, the catalytic reaction can only be driven under ultraviolet light, which only accounts for about 5% of the total energy of sunlight. This will inevitably make the photo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04C02F1/30C02F101/30
CPCB01J27/04C02F1/30C02F2305/10C02F2101/308B01J35/39Y02W10/37
Inventor 朱雯莉刘东亮杜娟杨巧玲
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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