Surfactant-templated mesostructured materials from inorganic silica

Area of Science:

• Materials Science
• Nanotechnology
• Chemistry

Background:

• Mesoporous silica materials synthesized using self-assembled surfactants have garnered significant research interest.
• Publication rates increased 100-fold between 1993 and 2003, primarily focusing on organosilicate precursors like tetramethylorthosilicate (TMOS) and tetraethylorthosilicate (TEOS).
• Organosilicate precursors are expensive, limiting applications to high-value markets.

Purpose of the Study:

• To review the preparation of mesoporous silica using cost-effective inorganic silica sources.
• To explore the potential of water glass and silica sol as alternatives to organosilicates.
• To summarize and discuss the current understanding of synthesis mechanisms using inorganic precursors.

Main Methods:

• Review of published literature on mesoporous silica synthesis.
• Focus on methods employing self-assembled surfactants as templates.
• Comparison of inorganic silica sources (water glass, silica sol) with conventional organosilicates (TMOS, TEOS).

Main Results:

• Inorganic sources offer a radical reduction in production costs for mesoporous silica.
• The use of inorganic sources can unlock new application areas due to lower price points.
• Less research has been conducted on inorganic routes, with limited understanding of reaction mechanisms.

Conclusions:

• Transitioning to inorganic silica sources like water glass and silica sol is crucial for economically viable mesoporous silica production.
• Further research is needed to elucidate the reaction mechanisms involved in synthesizing mesoporous silica from inorganic precursors.
• Cost-effective mesoporous silica synthesis opens avenues for wider industrial adoption and novel applications.