Preparation method of high-specific-surface-area ceramic hollow spheres

Abstract

The invention relates to the technical field of ceramic hollow spheres, and discloses a preparation method of the ceramic hollow spheres with high specific surface area, which comprises the followingsteps: 1) preparing water-based slurry with solid phase content of 30wt% by using alumina sol nanoparticles as a raw material; 2) adding short-chain amphiphilic molecule modified particles with the specific gravity of a sol suspension of 0.6 wt% into the water-based slurry, and adjusting the pH value of the sol suspension to 3.8; and 3) mixing the prepared water-based slurry with octane, and stirring the mixture at a speed of 300 rpm in a stirrer. The preparation method has the advantages that the water-based slurry is mixed with a certain proportion of octane, and then the super-stable microemulsion is obtained through mechanical stirring; the prepared microemulsion is put into a dropper and dropwise added into an alkaline solution, gelled emulsion drops are obtained, the hollow sphere material can be obtained after the gelled emulsion drops are dried and sintered. The specific surface area of the hollow sphere material reaches up to 200-410 m2/g; and a plurality of spherical pore structures are arranged in the catalyst, so that the use effect of the catalyst in the fields of loading, catalysis, slow release and the like can be improved to a large extent.

Description

technical field [0001] The invention relates to the technical field of ceramic hollow spheres, in particular to a preparation method of high specific surface area ceramic hollow spheres. Background technique [0002] Ceramic hollow spheres have attracted great interest in the past few decades due to their wide range of applications. This special material can be applied in the fields of loading, catalysis, slow release and so on. At present, the preparation of ceramic hollow spheres mainly includes the template method (hard template and soft template) and the template-free method, also known as the Ostwald ripening method. However, the above-mentioned methods have their own limitations, such as low yield, long production cycle, need for special equipment, complicated preparation process, etc. It is still challenging to develop synthetic processes for low-cost, short-cycle, and easy-to-mass-produced ceramic hollow spheres. With the rapid development of modern industry, espe...

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Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a method for preparing ceramic hollow spheres with a high specific surface area, which has the advantages of simple production process and high specific surface area, and solves the problems of poor application effects in the fields of loading, catalysis and sustained release.

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