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Cu2O/Cu9S5 photocatalytic material with hollow spherical structure as well as preparation method and application of Cu2O/Cu9S5 photocatalytic material

A photocatalytic material and photocatalyst technology, applied in the field of photocatalytic materials and environmental pollution control, can solve the problems of rapid photo-generated electron-hole recombination, easy to be corroded by light, unstable degradation performance of organic matter, etc. The effect of hole recombination rate, favorable adsorption, and broadening the visible light response range

Pending Publication Date: 2021-09-28
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Cu 2 O has good visible light sensing performance, but there are also defects that cannot be ignored, such as easy to be corroded by light, rapid photogenerated electron-hole recombination, and unstable degradation of organic matter.

Method used

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  • Cu2O/Cu9S5 photocatalytic material with hollow spherical structure as well as preparation method and application of Cu2O/Cu9S5 photocatalytic material
  • Cu2O/Cu9S5 photocatalytic material with hollow spherical structure as well as preparation method and application of Cu2O/Cu9S5 photocatalytic material
  • Cu2O/Cu9S5 photocatalytic material with hollow spherical structure as well as preparation method and application of Cu2O/Cu9S5 photocatalytic material

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preparation example Construction

[0031] A Hollow Spherical Cu for Organic Dye Wastewater Degradation 2 O / Cu 9 S 5 The preparation method of photocatalyst comprises the following steps:

[0032] (1) Preparation of Cu by chemical reduction method 2 O photocatalyst

[0033] The reaction temperature was set at 60°C, and 16 mL of 2 mol / L sodium hydroxide aqueous solution was added dropwise to 20 mL of 0.5 mol / L copper chloride aqueous solution. After stirring and reacting for 30 minutes, 8 mL of 1.25M aqueous glucose solution was added dropwise to the above system solution. Then continue to stir the mixed solution at a constant temperature of 60 °C for 3 hours until the color of the mixed solution gradually turns brick red and forms a stable precipitate, indicating that Cu has been successfully prepared. 2 O. The obtained product was centrifuged and soaked in deionized water and absolute ethanol to remove impurities within 24 hours, washed repeatedly for more than 3 times, and transferred to a vacuum drying ...

Embodiment 1

[0041] Preparation of Cu 2 O photocatalyst:

[0042] The reaction temperature was set at 60°C, and 16 mL of 2 mol / L sodium hydroxide aqueous solution was added dropwise to 20 mL of 0.5 mol / L copper chloride aqueous solution. After stirring and reacting for 30 minutes, 8 mL of 1.25M aqueous glucose solution was added dropwise to the above system solution. Then continue to stir the mixed solution at a constant temperature of 60 °C for 3 hours until the color of the mixed solution gradually turns brick red and forms a stable precipitate, indicating that Cu has been successfully prepared. 2 O. The obtained product was centrifuged and soaked in deionized water and absolute ethanol to remove impurities within 24 hours, washed repeatedly for more than 3 times, and transferred to a vacuum drying oven for 5 hours at 80°C to obtain Cu 2 O, crushed evenly for later use.

[0043] Take 0.4gCu 2 O was placed in a reactor filled with simulated wastewater, and after 2.5h (dark reaction 3...

Embodiment 2

[0045] Preparation of Cu 2 O / Cu 9 S 5 Photocatalyst (Cu 2 The mass ratio of O to thiourea is 4 / 1, denoted as Cu 2 O·S4 / 1):

[0046] Take by weighing the Cu prepared by 0.4g embodiment 1 2 O was dissolved in 10 mL of deionized water to form a turbid solution. Weighed 0.1 g of thiourea and dissolved it in 10 mL of ethanol, added it to the above system, and stirred and reacted in a water bath at 60 °C. After reacting for a certain period of time, the reaction product was centrifuged within 24 hours, soaked and washed with deionized water and ethanol for more than three times, and placed in a vacuum drying oven at 80°C for 5 hours to obtain S-doped modified Cu 2 O·S photocatalytic materials.

[0047] Take 0.4g modified Cu 2 The O·S photocatalytic material was placed in a reactor filled with simulated wastewater. After 2.5 hours (30 minutes of dark reaction + 2 hours of light reaction), the degradation rate of MO was as follows: Figure 4 shown.

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Abstract

The invention provides a preparation method of a hollow spherical structure Cu2O / Cu9S5 photocatalytic material, which comprises the following steps: 1) dispersing Cu2O into deionized water, and then adding an ethanol solution of thiourea according to a g:mL ratio of thiourea to ethanol of 1:20; 2) keeping the temperature at 60 DEG C for reaction; and 3) centrifuging the reacted mixture, soaking and washing the precipitate, and drying the washed precipitate in vacuum to obtain the hollow spherical structure Cu2O / Cu9S5 photocatalyst material. The invention also provides the Cu2O / Cu9S5 photocatalyst material prepared according to the preparation method and application of the Cu2O / Cu9S5 photocatalyst material in wastewater degradation. Compared with single Cu2O, the hollow spherical Cu2O / Cu9S5 photocatalyst prepared by the invention has the advantages that the visible light response range of the material is widened, and the capability of degrading organic dye wastewater under the irradiation of visible light is obviously improved.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials and environmental pollution control, in particular to a hollow spherical structure Cu 2 O / Cu 9 S 5 Photocatalytic materials and their preparation methods and applications. Background technique [0002] In recent years, the rapid development of the printing and dyeing industry has produced a large amount of dye wastewater. Traditional physical and chemical treatment methods have problems such as incomplete treatment results, high cost of treatment equipment and materials. The application of photocatalytic technology to degrade and treat wastewater has the advantages of low cost, strong treatability, clean and pollution-free, and proposes a good solution for the difficult-to-degrade toxic organic dye wastewater. [0003] Semiconductor material Cu 2 As a photocatalyst, O has the advantages of low cost, non-toxic, easy to obtain, and changeable energy bandgap, so it has broad appl...

Claims

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Application Information

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IPC IPC(8): B01J27/04B01J35/08B01J37/03B01J37/10C02F1/30C02F101/30
CPCB01J27/04B01J37/031B01J37/10C02F1/30C02F2101/308C02F2305/10B01J35/39B01J35/51
Inventor 赵军袁思杰王辉
Owner QINGDAO UNIV OF SCI & TECH
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