Study of the effects of surface modification by thermal shock method on photocatalytic activity of TiO2 P25

Microwave-Assisted and Metal-Induced Crystallization: A Rapid and Low Temperature Combination

“…As we do not detect a significant variation of the energy splitting in the Mn 3s spectra, we argue that the change in the satellite area of the Mn 2p spectra can be assigned to a change of the Mn 2+ from a chloride to an oxygenated environment. Thus, the decomposition of the Mn 2p spectra has been performed by considering the characteristic (main peak and satellites) of the Mn 2+ signature in the MnCl 2 and MnO environments …”

“…Thus, the decomposition of the Mn 2p spectra has been performed by considering the characteristic (main peak and satellites) of the Mn 2+ signature in the MnCl 2 and MnO environments. 35 The Mn 2p core peak of the MnCl 2 reference material is described by two main components, with a binding energy of the Mn 2p 3/2 of 642.3 eV due to the spin orbit coupling and two large satellites (Isat/I 2p 3/2 = 0.23) occurring at 5.7 eV higher binding energy with respect to the main peak (Figure 6c). A variation of the Isat/I 2p 3/2 ratio occurs with time, indicating a change in the manganese environment and/or oxidation state.…”

Remarkable Charge Separation and Photocatalytic Efficiency Enhancement through Interconnection of TiO2 Nanoparticles by Hydrothermal Treatment

“…The present hydrothermal method is extremely simple and offers the potential for large‐scale production. Incidentally, it was reported that heating of P25 powders in air at 973 K produced anatase particles with a primary particle size and photocatalytic activity almost identical to that of P25 . It is thus difficult for P25 to form tight inter‐particle contacts that can enhance charge separation efficiency by simple sintering at high temperatures.…”

Remarkable Charge Separation and Photocatalytic Efficiency Enhancement through Interconnection of TiO2 Nanoparticles by Hydrothermal Treatment

“…Incidentally,it was reported that heating of P25 powders in air at 973 K produced anatase particles with ap rimary particle size and photocatalytic activity almost identical to that of P25. [31] It is thus difficult for P25 to form tight inter-particle contacts that can enhance charge separation efficiency by simple sintering at high temperatures.I na ddition to highly efficient photocatalysts and dye-sensitized solar cells,T iO 2 materials exhibiting long-lived charge separation can be used as visible-lightresponsive photocatalysts,a fter surface modification, for the efficient utilization of solar or indoor light. [32] Further functionalization of Hyd-P25 and the extension of its synthetic method to other TiO 2 materials are currently under investigation in our laboratory.…”