Zn–TiO2 mesoporous oxides prepared by mechanical milling

Influence of crystallization conditions and of gaseous ammonia treatment on mesoporous TiO2 properties

“…This suggests that the condensation of the titanium clusters around the liquid crystal is incomplete likely due to the presence of Cl -, arising from the acid, at the interface [26]. The presence of chlorine in the hybrid mesophase has been identified in a previous study [63]. This behavior is similar to what it is observed for mesoporous thin film prepared from TiCl 4 precursor in the presence of F127 or Brij 58 surfactants after the drying at room temperature [64].…”

“…9A). The band gap energies have been determined from the UV spectra according to a method previously described [63]. From Table 4 it can also be seen that whatever the NH 3 pressure, applied during the treatment of the hybrid mesophase, the amounts of nitrogen and carbon in the calcined mesoporous titania are almost constant to 1.5 and 1.4%, respectively.…”

Cobalt Stabilization through Mesopore Confinement on TiO2 Support for Fischer–Tropsch Reaction

“…A decrease in the dV/dD values is observed after the calcination process and after cobalt incorporation. Such a decrease could be caused by the presence of cobalt species inside the pores of the mesoporous network, or even to organic molecules from the synthesis process, which would partially block the pores of the material . It is also worth mentioning that the average pore size decreased after the calcination treatment of the supports, being more evident in the solid calcined at 380 °C, going from 9.2 to 7 nm.…”

Insights into the Formation and Properties of Templated Dual Mesoporous Titania with Enhanced Photocatalytic Activity

“…The second contribution at 320 nm corresponds to small TiO 2 clusters. The energy band gap ( E ) can be evaluated , using the Kubelka–Munk formalism. The graphs obtained for P0/F100, P50/F50, and P100/F0 are given as examples in Figure B.…”

“…After synthesis, the dual mesoporous titania have been characterized by SAXS, TEM, DRX, manometry nitrogen adsorption/desorption, ATG, and UV. Detailed techniques about the equipment used and analysis procedures are given in refs − .…”