Tetraethyl orthosilicate

Tetraethyl orthosilicate (TEOS) is a high-purity (98%) colorless liquid silicon alkoxide widely used as a moisture-sensitive precursor to silicon dioxide (SiO₂). Through sol–gel hydrolysis and condensation, TEOS enables the formation of silica-based networks, aerogels, thin films, nanoparticles, and mesoporous structures. Its controlled reactivity and compatibility with catalysts and templating agents make it valuable in the chemical crosslinking of polymers and the fabrication of advanced materials for coatings, catalysis, hydrogels, biomedical devices, and nanoparticle-based drug delivery systems.

Commonly used as a precursor to prepare xerogel

Tetraethyl orthosilicate can be used:

• As a sol-gel precursor to synthesize SiO2-TiO2 anti-reflective self-cleaning coatings for solar cells.
• To fabricate nano silica functionalized crosslinked hybrid membranes for proton exchange membrane fuel cell applications. These membranes have better proton conductivity and thermal stability.
• To prepare poly(vinylidene fluoride)/TEOS matrix separator to enhance the performance of Li-ion batteries. The separator exhibits excellent electrolyte retention and wettability.
• An anti-solvent to fabricate an efficient perovskite layer for inverted planar solar cells with enhanced power conversion efficiency and reproducibility. TEOS helps to achieve high-quality perovskite films with reduced density of defects, and thus slower carrier recombination.
• As a precursor to prepare the xerogel.

Will interact with dodecylamine in the formation of intercalation compounds of H⁺-magadiite and used in a study of mixed-metal bioactive glasses.