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Photocatalyst Cu-CuO-MnO2 and preparation method thereof and application thereof

A photocatalyst, cu-cuo-mno2 technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of small particles and easy loss of composite catalyst materials problems such as good dispersibility, simple and easy preparation process, and easy industrial production

Inactive Publication Date: 2017-07-14
PINGDINGSHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CuO-CeO 2 The activity of the catalyst is closely related to the particle size and morphology. Among them, the one-dimensional nanowire structure has a high specific surface area, provides more active sites, easily forms oxygen vacancies, and promotes the migration of lattice oxygen. Good catalytic oxidation effect, but the one-dimensional nanowire material particles are small, and the composite catalyst material is easy to lose

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A kind of photocatalyst Cu-CuO-MnO of this embodiment 2 The preparation method is implemented according to the following process:

[0030] Take 30mL of deionized water, 12mL of 10mol / L NaOH solution, 6mL of 1mol / L NaOH solution 2 S 2 o 8 , Add 6mL of 25% ammonia water in turn into a 100mL small beaker, stir evenly, and prepare an alkaline solution. Polished and cleaned 6 pieces of 5×1cm 2 The copper foil is vertically inserted into the above solution, reacted for 60min, and Cu(OH) is uniformly grown on the surface of the copper foil. 2 , to get Cu-Cu(OH) 2 .

[0031] The Cu-Cu(OH) prepared above 2 Insert 80mL of 0.025mol / L KMnO 4solution, reacted in a 100mL hydrothermal kettle at 120°C for 3 hours, washed and dried the product, put it into a tube furnace for high-temperature roasting, raised the temperature to 250°C at a rate of 5°C / min, and roasted for 3 hours to obtain Cu-CuO- MnO 2 .

Embodiment 2

[0033] A kind of photocatalyst Cu-CuO-MnO of this embodiment 2 The preparation method is implemented according to the following process:

[0034] Take 30mL of deionized water, 12mL of 10mol / L NaOH solution, 6mL of 1mol / L NaOH solution 2 S 2 o 8 , Add 6mL of 25% ammonia water in turn into a 100mL small beaker, stir evenly, and prepare an alkaline solution. Polished and cleaned 6 pieces of 5×1cm 2 The copper foil is vertically inserted into the above solution, reacted for 60min, and Cu(OH) is uniformly grown on the surface of the copper foil. 2 , to get Cu-Cu(OH) 2 .

[0035] The Cu-Cu(OH) prepared above 2 Insert 80mL of 0.025mol / L KMnO 4 solution, reacted in a 100mL hydrothermal kettle at 120°C for 5 hours, washed and dried the product, put it into a tube furnace for high-temperature roasting, raised the temperature to 350°C at a rate of 5°C / min, and roasted for 3 hours to obtain Cu-CuO- MnO 2 .

Embodiment 3

[0037] A kind of photocatalyst Cu-CuO-MnO of this embodiment 2 The preparation method is implemented according to the following process:

[0038] Take 48mL of deionized water, 12mL of 10mol / L NaOH solution, 7.2mL of 1mol / L NaOH solution 2 S 2 o 8 , 7.2mL of 25% ammonia water was sequentially added into a 100mL small beaker, stirred evenly, and prepared into an alkaline solution. Polished and cleaned 6 pieces of 5×1cm 2 The copper foil is vertically inserted into the above solution, reacted for 40min, and Cu(OH) is uniformly grown on the surface of the copper foil. 2 , to get Cu-Cu(OH) 2 .

[0039] The Cu-Cu(OH) prepared above 2 Insert 80mL of 0.02mol / L KMnO 4 Solution, hydrothermal reaction at 110°C in a 100mL hydrothermal kettle for 5h, the product was cleaned and dried, put into a tube furnace for high-temperature roasting, and heated to 280°C at a rate of 5°C / min, and roasted for 3h to obtain Cu-CuO- MnO 2 .

[0040] In order to further verify that the photocatal...

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Abstract

The invention provides a preparation method of a photocatalyst Cu-CuO-MnO2, belonging to the technical field of photocatalysts. The preparation method of the photocatalyst Cu-CuO-MnO2 comprises the following steps of: polishing and washing a copper foil serving as a substrate, then soaking the copper foil in an alkaline solution for reacting for 40-60 minutes to obtain Cu-Cu(OH)2, wherein the alkaline solution is obtained by mixing 10mol / L of NaOH solution, 1mol / L of Na2S2O8, 25% ammonium hydroxide and water according to a certain volume ratio; and putting the prepared catalyst in 0.02-0.05mol / L of KMnO4 solution to carry out hydrothermal reaction for 3-5 hours at the temperature of 110-130 DEG C, cleaning and drying a reaction product, and roasting for 2-4 hours at the high temperature of 240-350 DEG to obtain the photocatalyst. The photocatalyst has the beneficial effects that the photocatalyst has relatively strong light degradation capacity for printing and dyeing wastewater in visible light and the removal rate of up to 98.9% for methylene blue in water; and after the photocatalyst Cu-CuO-MnO2 is reused five times, the degradation rate of the photocatalyst is reduced by not more than 1.5%.

Description

technical field [0001] The invention belongs to the technical field of photocatalysts, in particular to a photocatalyst Cu-CuO-MnO 2 And its preparation method and application. Background technique [0002] In dye wastewater treatment, commonly used catalysts include homogeneous system catalysts and heterogeneous powder catalysts. Homogeneous system catalysts are easy to lose and difficult to recycle. The powdered catalyst is easy to agglomerate, difficult to recycle, and the loss of the catalyst is likely to cause secondary pollution, and, in H 2 o 2 In the oxidation system, the reaction produces a large number of bubbles, which blow the powdered catalyst to the surface of the solution, reducing the contact area between the catalyst and the reactant, thereby reducing the degradation rate. [0003] Transition metal oxide powder catalysts have unique catalytic properties for dye wastewater, which has attracted widespread attention from scholars at home and abroad. such as...

Claims

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Application Information

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IPC IPC(8): B01J23/889C02F1/30C02F103/30C02F101/38
CPCY02W10/37B01J23/8892B01J23/002C02F1/30C02F2101/308C02F2101/38C02F2103/30C02F2305/10
Inventor 王莉李青彬徐伏曹云丽冯云晓张建红
Owner PINGDINGSHAN UNIVERSITY
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