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Updated: Jun 25, 2026

Facile Preparation of Ultrafine Aluminum Hydroxide Particles with or without Mesoporous MCM-41 in Ambient Environments
Published on: May 11, 2017
Sonochemical reactions with mesoporous alumina
Tony Chave1, Sergei I Nikitenko, Dominique Granier
1Institut de Chimie Séparative de Marcoule, UMR 5257 ICSM Site de Marcoule, BP 17171, 30207 Bagnols sur Cèze Cedex, France.
Sonication significantly accelerates mesoporous alumina dissolution and alters its properties. Ultrasound treatment transforms alumina into nanorods, nanofibers, nanosheets, or nanocrystals, depending on pH and duration.
Area of Science:
- Materials Science
- Chemical Engineering
- Physical Chemistry
Background:
- Mesoporous alumina (m-Al(2)O(3)) is a versatile material with applications in catalysis and adsorption.
- Understanding its dissolution and transformation is crucial for material design and process optimization.
- Sonochemistry offers a unique approach to manipulate material properties through acoustic cavitation.
Purpose of the Study:
- To investigate the sonochemical reactions of mesoporous alumina in aqueous solutions.
- To explore the effects of ultrasound on alumina's dissolution rate, textural properties, and phase composition.
- To elucidate the mechanisms behind ultrasound-induced transformations.
Main Methods:
- Sonication of MSU-X mesoporous alumina in aqueous solutions across a pH range of 4-11.
- Characterization of sonochemical products using techniques to analyze morphology, texture, and phase composition.
- Comparison of sonochemical hydrolysis with silent hydrolysis.
Main Results:
- Sonication significantly accelerated m-Al(2)O(3) dissolution between pH 4 and 11.
- Ultrasound treatment induced the formation of boehmite nanorods/nanofibers at pH 4 and transformed morphology to nanosheets or nanocrystals at prolonged treatment.
- Sonochemical products were primarily boehmite, with minor bayerite in alkaline media, contrasting with silent hydrolysis products.
Conclusions:
- Power ultrasound dramatically influences the dissolution and morphology of mesoporous alumina.
- The observed transformations are attributed to transient heating effects from acoustic cavitation, mimicking hydrothermal conditions.
- Sonochemistry provides a novel route for controlled synthesis and modification of alumina nanomaterials.
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