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Monolithic porous magnesium silicide.

N Hayati-Roodbari¹, R J F Berger, J Bernardi

¹Chemistry and Physics of Materials, University of Salzburg, 5020 Salzburg, Austria. michael.elsaesser@sbg.ac.at.

Dalton Transactions (Cambridge, England : 2003)

|April 27, 2017

Summary

Researchers created macroporous magnesium silicide monoliths using a two-step synthesis. This method yields a cellular, open structure, overcoming challenges in porosity and phase purity for magnesium silicide (Mg2Si).

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Area of Science:

Materials Science
Inorganic Chemistry
Nanotechnology

Background:

Macroporous materials are crucial for various applications, including catalysis and energy storage.
Magnesium silicide (Mg2Si) exhibits interesting electronic and thermoelectric properties.
Developing scalable synthesis methods for porous Mg2Si remains a challenge.

Purpose of the Study:

To develop a novel two-step synthesis for macroporous magnesium silicide monoliths.
To achieve a cellular, open macroporous structure in the synthesized Mg2Si.
To address and overcome challenges related to porosity loss and phase purity during synthesis.

Main Methods:

Preparation of macro-/mesoporous silicon from hierarchically organized meso-/macroporous silica.
Magnesiothermic reduction reaction using gaseous magnesium vapor and the prepared silicon.
Optimization of reaction conditions (experimental set-up, temperature, time) to control structure and purity.

Main Results:

Successfully synthesized monolithic magnesium silicide with a cellular, open macroporous structure.
Demonstrated control over porosity and phase purity of Mg2Si by adjusting reaction parameters.
Obtained a stable, monolithic magnesium silicide material with a well-defined cellular network.

Conclusions:

The two-step synthesis is effective for producing macroporous magnesium silicide monoliths.
The developed method allows for the creation of materials with desirable structural integrity and phase purity.
This work provides a pathway for fabricating advanced magnesium silicide-based materials.