XRD recorded TNT (TiO2 nanotubes) was anatase, but after grafted amino propyl triethoxy silane, The XRD of modified TNTs was anatase, H2Ti2O5.H2O, H4Ti4O4(SiO4)3.8H2O. How can I explain, please?
How did you perform the grafting? TiO2 is active especially under light irradiation. It is possible amino propyl trimethoxy silane to get transformed partially to SiOx.