Short range order at the amorphous TiO2-water interface probed by silicic acid adsorption and interfacial oligomerization: An ATR-IR and 29Si MAS-NMR study

► ATR-IR and 29Si NMR spectra of H4SiO4 on the amorphous TiO2 surface are reported. ► Sorption and oligomerization on TiO2 were similar to that on an amorphous iron oxide. ► Linear silicate oligomers are formed on disordered oxide surfaces. ► This result is interpreted using a structural model for the amorphous TiO2.