FTIR STUDIES OF THE TEOS/TEVS XEROGEL STRUCTURE USING RAPID THERMAL PROCESSING METHOD

Abstract

The tetraethyl orthocycate (TEOS) is mainly used as a silica precursor. Silanol content of silica material is the main cause of low hydrostability which led to resulting in poor performance, especially in water treatment. The stronger bond strength formed by incorporating a carbon structure from triethoxy vinyl silane (TEVS). The xerogel fabrication resulted in the composition of TEOS: TEVS: EtOH: HNO₃: H₂O: NH₃ to be 0.9: 0.1: 38: 0.00078: 5: 0.0003.   . The purpose is to study the structure of organosilica xerogel calcined at 350^oC, 450^oC and 600^oC in the Fourier-transform infrared (FTIR) using rapid thermal processing. The deconvolution of FTIR spectra calculated using the Fityk software. The result of the best xerogel peak shows at calcination of 450°C with peak area siloxane of 15.39, silanol of 3.32 and silica carbon of 3.85.