Related Experiment Video
Updated: Mar 1, 2026
05:50
Facile Preparation of Ultrafine Aluminum Hydroxide Particles with or without Mesoporous MCM-41 in Ambient Environments
Published on: May 11, 2017
11.3K
Nanostructure of gel-derived aluminosilicate materials.
Katalin Sinkó1, Nicola Hüsing, Günter Goerigk
1Institute of Chemistry, L. Eötvös University, PAzmAny st 1/a., H-1117, Budapest, Hungary. sinko@chem.elte.hu
Langmuir : the ACS Journal of Surfaces and Colloids
|January 1, 2008
Summary
Researchers explored aluminosilicate aerogels, varying precursors and conditions. Aluminum acetate use consistently yielded compact structures, offering a predictable route for material design.
Area of Science:
- Materials Science
- Nanotechnology
- Ceramic Engineering
Background:
- Aluminosilicate aerogels are advanced porous materials with tunable properties.
- Controlling nanostructure and porosity is crucial for specific applications.
- Predicting and tailoring aerogel texture remains a challenge.
Purpose of the Study:
- To investigate the influence of various synthesis parameters on aluminosilicate aerogel nanostructure and porosity.
- To establish methods for predicting final product structure and tailoring texture.
- To explore hybrid aerogels incorporating polymers.
Main Methods:
- Sol-gel preparation using diverse aluminum (Al) and silicon (Si) precursors.
- Variations in solvent content, surfactants, catalysts, and heat treatments.
- Synthesis of hybrid aerogels with poly(acrylic acid), polyvinyl acetate, and polydimethylsiloxane.
- Characterization using 27Al MAS NMR, Small-Angle X-ray Scattering (SAXS), Scanning Electron Microscopy (SEM), and porosity measurements.
Main Results:
- Tetraethoxysilane (TEOS) and aluminum nitrate or isopropoxide precursors facilitated loose fractal structures with high porosity and Al incorporation.
- Aluminum acetate, regardless of Si precursor, pH, or catalyst, consistently resulted in compact aerogel structures.
- Hybrid aerogels were successfully synthesized and characterized.
Conclusions:
- The choice of aluminum precursor significantly dictates the final aerogel structure.
- Aluminum acetate offers a reliable route to dense aluminosilicate aerogels.
- Understanding precursor-structure relationships enables tailored synthesis of aluminosilicate and hybrid aerogels.
