Hollow porous silica hydrophobic microspheres, and preparation method and application thereof

Porous silica hydrophobic microspheres were prepared by synergistic pore-forming with hard and soft templates and mild silanization modification, which solved the problems of environmental toxicity and separation efficiency in the existing hollow microsphere preparation process and achieved efficient separation and removal of specific oil pollutants.

CN120964823BActive Publication Date: 2026-04-14QINGDAO UNIV OF TECH
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Patent Information

Application Number
CN202511298302.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-09-11
Publication Date
2026-04-14
Estimated Expiration
2045-09-11

AI Technical Summary

Technical Problem

Existing hollow microsphere preparation technologies suffer from high toxicity, cumbersome template removal steps, easy shell rupture, inability to efficiently separate oil pollutants of specific sizes or structures, and traditional fluoride modification is harmful to the environment.

Method used

Porous silica hydrophobic microspheres were prepared by using a combination of hard and soft templates for pore formation, a water-alcohol system for low-toxicity synthesis, gradient calcination control, and mild silanization modification. After forming a complete framework with a hard template, hydrophobic modification was performed to ensure uniform grafting of hydrophobic groups.

Benefits of technology

A porous microsphere with intact structure and good hydrophobicity was prepared to achieve efficient separation and removal of specific oil pollutants. The process is environmentally friendly and safe, and is suitable for catalysts and pollutant adsorbents.

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Abstract

The application belongs to the technical field of nanomaterials, and particularly relates to a hollow porous silica hydrophobic microsphere and a preparation method and application thereof. The preparation method comprises the following steps: mixing a hard template and anhydrous ethanol by ultrasonic dispersion to obtain a hard template dispersion liquid; adding the hard template dispersion liquid into a solvent to stir and adding ammonia water under the stirring state, then adding a soft template to continue stirring to obtain a mixed liquid; adding a hole expanding agent to the mixed liquid, then dropwise adding tetraethyl orthosilicate to continue stirring to carry out a reaction to obtain a product; performing centrifugation, washing, drying and calcination treatment on the product to obtain a calcined product; and performing water bath heating reaction on the calcined product and organosiloxane to obtain the hollow porous silica hydrophobic microsphere. The hollow porous silica hydrophobic microsphere has a simple preparation method, mild conditions, no toxicity and harmlessness, and common materials are used as raw materials, and the material can be used for water pollutant adsorption.
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