“…For instance, multiple reactions take place simultaneously in the process, making it difficult to extract information from experimental procedures [ 20 ]. To date, many studies have attempted to elucidate the influence of precursors on the hydrolysis, condensation reactions, and crosslinking by applying different characterization and analysis techniques, including gas chromatography (GC) [ 21 ], nuclear magnetic resonance 29 Si NMR [ 22 , 23 ], Raman spectroscopy [ 24 ], and Fourier transform infrared spectroscopy (FTIR) [ 25 , 26 ]. Among these approaches, FTIR not only provides complementary information on the bonds and structures formed during the synthesis process but also, when combined with deconvolution methods, yields valuable data on the microstructure of siliceous materials [ 27 , 28 , 29 ].…”