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Copper chromite/carbon nanotube nano-composite catalyst, preparation method and application

A technology of carbon nanotubes and copper chromite, which is applied in the field of preparation of copper chromite/carbon nanotube nanocomposite catalysts and its preparation, can solve the problems of reducing catalyst catalytic efficiency and easy agglomeration, and achieve excellent catalytic effects

Active Publication Date: 2012-06-20
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nano-copper chromite is very easy to agglomerate, thus reducing the catalytic efficiency of the catalyst

Method used

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  • Copper chromite/carbon nanotube nano-composite catalyst, preparation method and application
  • Copper chromite/carbon nanotube nano-composite catalyst, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Weigh 1 g of multi-walled carbon nanotubes into a round bottom flask, add concentrated nitric acid, ultrasonicate for 30 minutes, reflux at 90° C. for 3 hours, cool, filter, wash, and dry.

[0023] (2) Weigh 1.2765g of copper nitrate hexahydrate and 3.4564g of chromium nitrate nonahydrate into an in-situ flask, add deionized water and stir to dissolve. 1 g of multi-walled carbon nanotubes oxidized in step (1) was added, ultrasonicated for 30 minutes, stirred at 30° C. for 5 hours, and then left to stand for 12 hours. Concentrated aqueous ammonia was added dropwise under stirring at 30°C until the pH value was 8.5, and then stood still for 4 hours. Filter with suction, wash the product three times with distilled water and ethanol successively, and dry.

[0024] (3) Calcining at 280° C. for 2 hours under an air atmosphere, the copper chromite / carbon nanotube nanocomposite catalyst can be prepared. The transmission electron microscope photograph of gained copper chro...

Embodiment 2

[0026] (1) Weigh 1 g of multi-walled carbon nanotubes into a round bottom flask, add concentrated nitric acid, ultrasonicate for 30 minutes, reflux at 90° C. for 3 hours, cool, filter, wash, and dry.

[0027] (2) Take by weighing 1.9147g of copper nitrate hexahydrate and 5.1846g of chromium nitrate nonahydrate in a round bottom flask, add deionized water and stir to dissolve; then, add 1g of multi-walled carbon nanotubes through step (1) oxidation treatment , sonicated for 30 min, stirred at 30 °C for 5 h, and then allowed to stand for 12 h. Concentrated aqueous ammonia was added dropwise under stirring at 30°C until the pH value was 8.5, and then stood still for 4 hours. Filter with suction, wash the product three times with distilled water and ethanol successively, and dry.

[0028] (3) Calcining at 320° C. for 2 hours under an air atmosphere, the copper chromite / carbon nanotube nanocomposite catalyst can be prepared.

Embodiment 3

[0030] (1) Weigh 1 g of multi-walled carbon nanotubes into a round bottom flask, add concentrated nitric acid, ultrasonicate for 30 minutes, reflux at a temperature of 90° C. for 3 hours, cool, filter, wash, and dry.

[0031] (2) Weigh 0.3156g of copper chloride dihydrate and 1.4813g of chromium nitrate nonahydrate in a round bottom flask, add deionized water and stir to dissolve; then, add 1g of multi-walled carbon nanometer through step (1) oxidation treatment Tubes were sonicated for 30 min, stirred at 30 °C for 5 h, and then allowed to stand for 12 h. Concentrated aqueous ammonia was added dropwise under stirring at 30°C until the pH value was 8.5, and then stood still for 4 hours. Filter with suction, wash the product three times with distilled water and ethanol successively, and dry.

[0032] (3) Calcining at 320° C. for 2 hours under an air atmosphere, the copper chromite / carbon nanotube nanocomposite catalyst can be prepared.

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Abstract

The invention discloses a copper chromite / carbon nanotube nano-composite catalyst, a preparation method and application, and belongs to the technical field of catalysts. Copper chromite nanoparticles are uniformly loaded on the surfaces of multi-wall carbon nanotubes. The preparation method comprises the following steps of: adsorbing metal ions to the surfaces of the functionalized carbon nanotubes; depositing on the surfaces of the carbon nanotubes to form copper chromite precursor under the action of ammonia water; and performing high-temperature treatment to obtain the copper chromite / carbon nanotube nano-composite catalyst. In the invention, the problems of serious agglomeration and the like of the nano copper chromite catalyst are solved; and the obtained copper chromite / carbon nanotube nano-composite catalyst is used as a high-efficiency combustion catalyst of a solid propellant, a carbonyl compound hydrogenation alcohol preparation catalyst and a nitrobenzene hydrogenation aniline preparation catalyst.

Description

technical field [0001] The invention relates to a copper chromite / carbon nanotube nanocomposite catalyst and a preparation method thereof, belonging to the field of catalysts. The copper chromite / carbon nanotube nanocomposite catalyst can be used as a high-efficiency combustion catalyst for solid propellants, and can also be used as a catalyst for hydrogenation of carbonyl compounds to produce alcohols and a catalyst for hydrogenation of nitrobenzene to produce aniline. technical background [0002] Carbon nanotubes have structural characteristics such as large specific surface area and hollow structure, as well as good surface modification, so that they have unique catalytic properties and good conditions as catalyst supports, and they have excellent physical and chemical properties such as thermal conductivity and electrical conductivity. Carbon nanotubes can be used both as catalysts and as catalyst supports, and as functional additives. Carbon nanotubes and metal oxides...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/86C07C29/136C07C209/36C07C211/46C06D5/00
Inventor 刘云芳迟伟东沈曾民
Owner BEIJING UNIV OF CHEM TECH
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