Porous TiO2/SiO2 composite prepared using PEG as template direction reagent with assistance of supercritical CO2

Enhanced photocatalytic activity of silica-embedded TiO2 hollow microspheres prepared by one-pot approach

“…Undoubtedly, the differences of the FT-IR spectra between the two samples are related to the introduction of silicon source. However, it is difficult to assign the ascription of this band to Si-O-Si or Si-O-Ti [38,39]. It has been reported by Jung and Park [40] that the band for Ti-O-Si vibration is distinct, when the silicon content is over 30 at.%.…”

Synthesis, characterization, and application of Nd, Zr–TiO2/SiO2 nanocomposite thin films as visible light active photocatalyst

“…The strong bands at about 1,630 cm -1 have been assigned to H-OH bending vibration of physically adsorbed water and hydroxyl group [7]. The band at 791 cm -1 , along with a weak band at 960 cm -1 are commonly assigned to vibration of Si-O-Ti band [34]. The bands around 1,113 cm -1 can be related to asymmetric stretching of the Ti-O bands [35,36].…”

Titania–silica–phosphonate triconstituent hybrid mesoporous materials as adsorbents in gas and liquid phases

“…The overlapped bands at 1460 and 1423 cm −1 corresponded to the C-H bending in -CH 2 -groups and the P-C stretching vibration [34], respectively. The strong band at 1096 cm −1 was due to phosphonate P-O· · ·Ti stretching vibrations [35,36]. Interestingly, a small peak at 977 cm −1 appeared apparently in sample TSP-4, and weakened with the decrease of the silica content in sample TSP-1, even finally disappeared in TSP-0, which could be assigned to the Si-OH stretching mode whose vibrational intensity was influenced by the Ti species content [37,38], suggesting the formation of Si-O-Ti bonds and Si 4+ species were substituted for the Ti 4+ in the materials.…”