Co-modified metal organic framework-derived ZrO2/C electromagnetic wave absorbing material, and preparation method and application thereof

Abstract

The invention relates to a Co-modified metal organic framework-derived ZrO2/C electromagnetic wave absorbing material, and a preparation method and an application thereof. The electromagnetic wave absorbing material is of a three-dimensional network structure formed by interweaving one-dimensional fibers. The fiber is composed of a carbonaceous matrix, ZrO2 and Co nanoparticles. The Co nanoparticles are embedded in the surface of the carbonaceous matrix uniformly distributed by ZrO2. The method comprises the steps that 1, a cobalt source, a zirconium source, an anhydrous acetic acid organic ligand and DMF are processed into a solvothermal solution, the organic ligand containing a carbon source, an MOF precursor is obtained after solvothermal reaction, the MOF precursor is washed and dried,then the MOF precursor is treated with the cobalt source, and cobalt source composite MOF is obtained; and (2) the compounded MOF precursor is placed in a protective atmosphere to convert cobalt ionsin a cobalt source into elemental cobalt, a zirconium source into ZrO2 and an organic ligand into a carbon matrix, thereby obtaining the catalyst. According to the preparation method disclosed by theinvention, ZrO2, Co and C are effectively subjected to nanoscale compounding, so that the prepared material has excellent performance.

Description

technical field [0001] The invention belongs to the field of electromagnetic wave absorbing materials, in particular to ZrO derived from a Co-modified metal-organic framework (MOF) 2 / C Electromagnetic wave absorbing materials and their preparation methods and applications. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] With the rapid development of communication technology and electronic products, electromagnetic pollution continues to intensify, and human health will also be damaged. Studies have shown that excessive electromagnetic radiation can cause various nervous system disorders. In the military, as modern warfare moves towards informationization, the possibilit...

AI Technical Summary

Problems solved by technology

For wave-absorbing materials, it is difficult for a single absorber to achieve broadband absorption. As a dielectric material, zirconia cannot provide appropriate electrical loss and magnetic loss, and according to the impedance matching condition, a single It is difficult for zirconium dioxide to meet the impedance matching conditions, and it is difficult to obtain excellent electromagnetic wave absorption performance, which also limits its further development and application.

[0005] In the prior art, two kinds of metal-carbon composite absorbing materials have also been prepared, but they still have the problems of poor absorbing performance and easy collapse of carbon materials.

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