Tetraethoxysilane (TEOS), with the chemical formula Si(OC₂H₅)₄, is a well-known precursor in the synthesis of silica and silica-based materials. It belongs to the group of alkoxysilanes, where a silicon atom is bonded to four ethoxy (OC₂H₅) groups.
TEOS is primarily used in sol-gel processes, where it undergoes hydrolysis in the presence of water to form silanol groups (Si-OH). These silanol groups can then condense to form siloxane (Si-O-Si) bonds, leading to the formation of silica networks. This ability to form silica under controlled conditions makes TEOS a versatile material in various applications.
Tetraethoxysilane
78-10-4
TEOS
TE 28
Appearance | Colorless Transparent Liquid |
Purity(%) | ≥99% |
Density（ρ20）, g/cm³ | 0.920~0.960 |
Molecular Weight | 208.33 |
Refractive Index（n²⁵D） | 1.3788-1.3888 |
Tetraethoxysilane
1.Precursor for Silica Production: TEOS is primarily used as a precursor in the production of silica and silica-based materials. It is a key starting material in the sol-gel process, where it undergoes controlled hydrolysis and condensation reactions to form silica networks.
2.Coatings and Thin Films: It is used in the manufacture of coatings and thin films on various substrates, such as glass and ceramics. These coatings can impart properties like scratch resistance and barrier protection.
Catalyst Support: TEOS can be used as a support material in catalysts due to its ability to form porous silica structures.
3.Nanotechnology: It finds applications in nanotechnology for the synthesis of silica nanoparticles and nanostructures.
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