Phase-transition kinetics of silicon-doped titanium dioxide based on high-temperature X-ray-diffraction measurements

TiO2–SiO2 Self-Standing Materials bearing Hierarchical Porosity: MUB-200(x) Series toward 3D-Efficient VOC Photoabatement Properties

“…However, at the molecular level, we have already observed such a forbidden silica–titania interaction where TiO 2 was heterogeneously grown at the silica wall surface, and we mentioned “a pseudo epitaxial phenomenon demonstrating that···, the Si–O–Ti bonds at the silica/titania interfaces are not cleaved, as the amorphous silica network can hinder the TiO 2 crystallization upon thermal treatment, when no pre-hydrolyzed sols are employed”. Recently it has been shown that the TiO 2 crystal growth is controlled by the growth of the particle interfaces, leading to increases in both the phase-transition temperature and activation energy . In the present case, not only is the anatase to rutile allotropic change hindered at the molecular level but also the whole P25 Degussa nanoparticles when confined within the silica matrixes do not depict the anatase to rutile phase transition, even during a 7 h treatment at 700 °C (Figure ).…”

Effect of TiO2 on the thermal performance and emissivity of glass coatings

“…Specifically, the clear and well-defined peaks at 25.5° and 27.6° indicated the strong stability of the crystalline phase in the TiO 2 component of the sintered coating. 22 The sharp and narrow peak at 25.5° confirmed an increase in crystal size and crystallinity.…”

Investigation of the photoactivation effect of TiO2 onto carbon-clay paste electrode by cyclic voltammetry analysis

“…It is also observed on the clay diffractogram but at low intensity, which might be due to the presence of organic materials in the samples [ 45 ]. The different respective peaks observed at 2 equal to 36.093° and 41.231° are characteristic of titanium dioxide in the anatase form [ 46 , 47 ]. In general, these types of clays fix water (Cations, molecules, etc.)…”