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Method for preparing mesoporous CeO2 nano-tubes having large specific surface area and high catalytic activity

A technology with high catalytic activity and high specific surface area, applied in the field of preparation of mesoporous CeO2 nanotubes, can solve the problem of low specific surface area and achieve high catalytic activity and low light-off temperature

Inactive Publication Date: 2010-12-22
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, due to the solid nanostructure, its specific surface area is still low.
Therefore, it is still a great challenge to prepare CeO2 nanostructures with high specific surface area.

Method used

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  • Method for preparing mesoporous CeO2 nano-tubes having large specific surface area and high catalytic activity
  • Method for preparing mesoporous CeO2 nano-tubes having large specific surface area and high catalytic activity
  • Method for preparing mesoporous CeO2 nano-tubes having large specific surface area and high catalytic activity

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Embodiment Construction

[0020] Raw materials: zinc acetate, cerium nitrate, sodium hydroxide, nitric acid, absolute ethanol, etc.

[0021] Preparation steps:

[0022] (1) Preparation of ZnO nanorods. ZnO nanorods with a diameter of about 20 nanometers and an aspect ratio of about 10 were synthesized by hydrothermal method. The specific process is: 15mL concentration is 0.1ML -1 The zinc acetate ethanol solution was added dropwise to 30mL with a concentration of 0.5ML -1 NaOH ethanol solution and stirred for 30 min. Then the mixed solution was transferred to a 60mL autoclave, and heated in an oven at 150-200°C for 24 hours. The reacted product was filtered several times with deionized water and then dried in air at 60°C;

[0023] (2) Preparation of ZnO / mesoporous CeO2 core-shell structure. On the basis of the obtained ZnO nanorods, the ZnO / mesoporous CeO was constructed by a continuous ion-layer adsorption reaction method. 2 Core shell structure. The specific process is as follows: First, put ...

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Abstract

The invention discloses a method for preparing mesoporous cerium oxide nano-tubes. The method comprises the following steps: firstly, obtaining a ZnO / CeO2 core-shell structure in the presence of ZnO nano-rods as a mold board by using the method for continuously carrying out absorption reaction on ionic layers; then, carrying out thermal treatment to form a ZnO / mesoporous CeO2 core-shell structure having better thermal stability; and finally, removing the middle ZnO nano-rod through chemical corrosion to obtain the mesoporous CeO2 nano-tubes. The mesoporous CeO2 nano-tubes prepared by using the method have the advantages of large specific surface area and high catalytic activity; and the mesoporous CeO2 nano-tubes are expected to become the catalyst material of a new generation, which plays an important part in the field of energy conservation, environmental protection, medical treatment and public health.

Description

technical field [0001] The invention relates to the technical fields of energy, biomedicine and catalysis, and specifically refers to a method for preparing mesoporous CeO2 nanotubes with high specific surface area and high catalytic activity. Background technique [0002] As a rare earth oxide with catalytic activity, cerium oxide has important applications in controlling automobile exhaust emissions, renewable desulfurization, hydrogen production from water gas, treatment of organic matter in sewage, new solar cells, and as an antioxidant in biomedicine. A large number of studies have shown that the catalytic activity, oxygen storage capacity, and oxygen migration ability of cerium oxide are affected by the surface area and structural characteristics of cerium oxide. Therefore, designing and synthesizing cerium oxide nanostructures with larger specific surface area and higher surface activity is of great significance for the above-mentioned applications. At present, the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00
Inventor 华国民张立德
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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