Preparation method of uranium dioxide-carbon composite porous material

By preparing uranium dioxide-carbon multiphase porous materials, the problems of insufficient structural strength and electrical conductivity of existing uranium dioxide materials in the preparation of porous ceramics have been solved, achieving high efficiency in catalysis and thermoelectric performance, and the process is simple.

CN117430430BActive Publication Date: 2025-11-21LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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Patent Information

Application Number
CN202311384192.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-10-24
Publication Date
2025-11-21
Estimated Expiration
2043-10-24

AI Technical Summary

Technical Problem

Existing uranium dioxide materials suffer from low structural strength, low electrical conductivity, and limited preparation methods in porous ceramics, which restricts their application in catalysis and thermoelectric fields.

Method used

A porous carbon material was prepared using resorcinol and formaldehyde solution as a framework. Combined with uranium oxide precursor and structure directing agent, a uranium dioxide-carbon multiphase porous material was prepared by high-temperature carbothermal reduction reaction, and the density, specific surface area and electrical conductivity of the material were controlled.

Benefits of technology

The prepared uranium dioxide-carbon multiphase porous material has high phase purity, stable structure, and high specific surface area and electrical conductivity, which improves its catalytic and thermoelectric properties. Moreover, the process is simple and easy to implement.

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Abstract

The application relates to a preparation method of a uranium dioxide-carbon composite porous material, which comprises the following steps: 1) preparing a resorcinol-formaldehyde sol; 2) storing the resorcinol-formaldehyde sol in a constant-temperature sealed state, and performing air drying to obtain a resorcinol-formaldehyde aerogel; 3) performing high-temperature treatment on the resorcinol-formaldehyde aerogel in an argon atmosphere to obtain a porous carbon material; 4) preparing a uranium oxide precursor solution; 5) immersing the porous carbon material in the uranium oxide precursor solution, and then performing drying in air, and repeating the above steps for multiple times to obtain a porous material blank; and 6) performing high-temperature treatment on the porous material blank in a low-pressure environment to obtain the uranium dioxide-carbon composite porous material. The preparation process is simple, and no expensive equipment is needed. The uranium dioxide-carbon composite porous material has high phase purity, good structural stability, and the density, specific surface area and conductivity of the material can be controlled in a large range according to design requirements, so that the application of the material in the fields of catalysis and thermoelectricity can be met.
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