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A kind of preparation method of polyhedral nano-oxide for catalysis

A technology of nano-oxides and polyhedrons, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, chemical/physical processes, etc., can solve serious powder agglomeration, poor catalytic performance, and oversized particles and other problems, to achieve the effect of good crystal morphology, improved performance of catalytic degradation of organic pollutants, and low synthesis temperature

Active Publication Date: 2016-08-17
上海泛翌新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing polyhedral nano-oxides for catalysis in order to solve the problems of the existing copper oxide powder synthesis technology, such as too large particles, too serious powder agglomeration, etc., and the problems of poor catalytic performance caused thereby.

Method used

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Embodiment 1

[0030] The invention discloses a preparation method of nano polyhedral oxide for catalysis, that is, nano copper oxide.

[0031] The copper salt used in the preparation is Cu(NO 3 ) 2 ·3H 2 O, the alkali source used is NH 3 ·H 2 O, the molten salt used is KNO 3 , NaNO 3 .

[0032] Weigh 15.1gCu(NO 3 ) 2 ·3H 2 O, dissolved in 125ml deionized water to form a 0.5mol / l solution, add NH dropwise 3 ·H 2 O until the pH of the solution is between 6-8, stir on a constant temperature magnetic stirrer at 60°C for 1.5h at a constant temperature, filter and wash two to three times after a precipitate is formed, and put it in an oven to dry. Weigh the dried precursor and take a certain amount of KNO 3 and NaNO 3 , and put them together into a ball mill jar for ball milling for 2h.

[0033] KNO used above 3 and NaNO 3 The molar ratio of the substance is 1:1, the mass ratio of the dried product to the molten salt is 45:55, and the ball:material:alcohol in the ball mill tank is...

Embodiment 2

[0037] The invention discloses a preparation method of nano polyhedral oxide for catalysis, that is, nano copper oxide.

[0038] The copper salt used in the preparation is CuCl 2 2H 2 O, the alkali source used is NH 3 ·H 2 O, the molten salt used is KNO 3 , NaNO 3 .

[0039] Weigh 10.655g CuCl 2 2H 2 O, dissolved in 125ml deionized water to form a 0.5mol / l solution, add NH dropwise 3 ·H 2O until the pH of the solution is between 6-8, stir on a constant temperature magnetic stirrer at 60°C for 1.5h at a constant temperature, filter and wash two to three times after a precipitate is formed, and put it in an oven to dry. Weigh the dried precursor and take a certain amount of KNO 3 and NaNO 3 , and put them together into a ball mill jar for ball milling for 2h.

[0040] KNO used above 3 and NaNO 3 The molar ratio of the substance is 1:1, the mass ratio of the dried product to the molten salt is 45:55, and the ball:material:alcohol in the ball mill tank is 2:1:0.6.

...

Embodiment 3

[0043] The invention discloses a preparation method of nano polyhedral oxide for catalysis, that is, nano copper oxide.

[0044] The copper salt used in the preparation is Cu(NO 3 ) 2 ·3H 2 O, the alkali source used is NaOH, and the molten salt used is KNO 3 , NaNO 3 .

[0045] Weigh 15.1gCu(NO 3 ) 2 ·3H 2 O, dissolve in 125ml deionized water to form a 0.5mol / l solution, add NaOH dropwise until the pH of the solution is between 6-8, then stir on a constant temperature magnetic stirrer at 60°C for 1.5h, and filter with suction after precipitation is formed Wash two to three times and place in the oven to dry. Weigh the dried precursor and take a certain amount of KNO 3 and NaNO 3 , and put them together into a ball mill jar for ball milling for 2h.

[0046] KNO used above 3 and NaNO 3 The molar ratio of the substance is 1:1, the mass ratio of the dried product to the molten salt is 45:55, and the ball:material:alcohol in the ball mill tank is 2:1:0.6.

[0047] Dry...

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Abstract

The invention relates to a preparation method of polyhedral nano oxide for catalyzing. The preparation method comprises the following steps: preparing nano polyhedral copper oxide powder by a salt melting method taking a potassium source and a sodium source as melted salt; dissolving copper salt into water to prepare a solution; dropping an alkali source into the solution until the pH of the solution is 6-8; putting the solution into a constant-temperature magnetic stirrer to be stirred at constant temperature of 60 DEG C; filtering and washing for two to three times after sediment is generated and putting the product into a drying oven to be dried; putting a dried precursor, sodium salt and potassium salt into a ball milling tank to be milled; drying the milled mixed solution and transferring the solution into a crucible to be calcined; then cooling in the air to room temperature; and filtering, washing and drying to prepare the nano polyhedral copper oxide powder. The preparation method has the advantages of low synthesis temperature, simplicity in operation, uniform chemical components of the synthesized powder, good crystal appearance and the like; and a Rhodamine B degrading experiment shows that compared with commodity nano copper oxide, the catalyzing performance is greatly improved.

Description

technical field [0001] The invention relates to the technical field of preparation of polyhedral nano-oxides, in particular to a method for preparing polyhedral nano-oxides for catalysis. Background technique [0002] The nano-catalytic technology that has just started in my country, although only TiO 2 , ZnO, and a few varieties have been industrialized. But it has shown good prospects for development. At the nanotechnology seminar that ended at the end of 2004, experts believed that nanomaterials have unique crystal structures and surface properties, and their catalytic activity and selectivity are much higher than traditional catalysts, and can be used as new catalytic materials in the chemical industry. Undoubtedly, as the particle size of nanoparticles decreases, the surface area gradually increases, and the adsorption capacity and catalytic performance are also enhanced. These unique effects enable nano-catalysts to not only control the reaction speed, greatly impro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/72B01J35/02
Inventor 曾涛白杨刘伟景姚伟峰
Owner 上海泛翌新材料有限公司
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