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Synthesis of Multishelled Silica Particles by Using Choline Hydroxide as Catalyst
Yang Hu1, Xiaoyu Zhang2, Lin Zhang2
1State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, China.
Langmuir : the ACS Journal of Surfaces and Colloids
|February 5, 2025
Summary
We developed a simple method to create multishelled silica particles using choline hydroxide (ChOH) catalyst. This technique precisely controls shell structure for advanced materials in catalysis and drug delivery.
Area of Science:
- Materials Science
- Nanotechnology
- Chemical Synthesis
Background:
- Multishelled silica particles offer unique properties for advanced applications.
- Controlled synthesis of these structures remains a challenge.
Purpose of the Study:
- To develop a facile one-pot strategy for synthesizing multishelled silica particles.
- To precisely control structural parameters like shell multiplicity and thickness.
Main Methods:
- Utilized choline hydroxide (ChOH) as an organic base catalyst.
- Manipulated ChOH addition sequence and concentration to control silica condensation.
- Employed hot water etching to refine multishelled architectures.
Main Results:
- ChOH effectively regulated hydrolysis and condensation kinetics of tetraethyl orthosilicate (TEOS).
- Shell multiplicity correlated with ChOH addition sequence; shell thickness tuned by ChOH concentration.
- Achieved well-defined multishelled silica particle architectures from monoshelled to complex structures.
Conclusions:
- The one-pot ChOH-catalyzed method offers versatile control over silica particle structure.
- This approach enables the design of advanced silica materials for catalysis, sensing, and drug delivery.
