Hydrothermal synthesis and characterization of nanostructured titanium monoxide films

Abstract

At the present time, the formation of titanium monoxide (TiOx) two dimensional (2D) species with distinct composition, size, shape, and a significantly reduced bandgap (Eg) value compared to TiO2 is of great scientific and practical importance.

Substrate Impact on the Structure and Electrocatalyst Properties of Molybdenum Disulfide for HER from Water

“…Titanium substrates covered with nanostructured titanium monoxide, particularly TiOx nanofeatures, were also tested. These nanostructured films (Figure 9a) were fabricated hydrothermally in the selenious acid solution as reported recently [37]. The quality of MoS2 nanoplatelet array formed onto the Ti/TiOx substrate was dependent on the MoS2 synthesis conditions.…”

“…The surface of titanium samples was ultrasonically cleaned in acetone, ethanol, and water, 6 min in each, and air dried. Three kinds of Ti surface preparation were used in our subsequent study, namely, pure Ti, Ti covered by nanotube-shaped anatase TiO 2 layer via anodizing and calcination, and Ti covered with nanostructured titanium suboxide by hydrothermal treatment under conditions evaluated by us earlier [37]. Ti surface anodizing was conducted in the thermostated Teflon cell containing 2.0 mol L −1 H 3 PO 4 and 0.2 mol L −1 NH 4 F at 17 ± 0.3 • C and 20 V dc for 1 h. In this setup, two platinum plates were used as cathodes.…”

“…For Ti surface coating with the nanostructured titanium suboxide (TiO x ) film, the specimens were hydrothermally treated in 0.2 mol L −1 H 2 SeO 3 at 180 • C for 15 h, rinsed, and annealed in deoxygenated atmosphere by heating together with Cu foil in a sealed glass tube at 300 • C for 10 h, as reported earlier [37].…”

Deposition of Ti-Zr-O-N films by reactive magnetron sputtering of Zr target with Ti ribbons

“…There are two tetragonal (Rutile, Anatase) and one orthorhombic (Brookite) phases of TiO2, whose densities are in the range of 8.8-9.6×10 22 at/cm 3 and 3.87-4.25 g/cm 3 ), and four ZrO2 phases (monoclinic (Baddeleyite), cubic, tetragonal and orthorhombic), with densities of 8.5-10.7 at/cm 3 and 5.82-7.27 g/cm 3 . Finally, between the Ti monoxide and the dioxide there is a family of Odeficient compounds, with generic formula TixO2x-1, with x in the range 2-10 (although higher values of x are reported [39][40][41]); these are the so-called Magnéli phases [42,43] (e.g. r-Ti2O3 or m-Ti3O5) and they show densities lower than the one of TiO.…”

Design and Characterization of Nanostructured Titanium Monoxide Films Decorated with Polyaniline Species

“…Therefore, in this study, we designed the chemical oxidation of the Ti surface into titanium suboxide thin films by hydrothermal treatment under appropriate oxidation/dissolution reactivity with a controllable thickness and surface morphology. For this, an alkaline solution of 0.4 mol L −1 H 2 SeO 3 , already reported by us [35], has been slightly modified and used in this study. In this way, highly porous nanostructured films composed of titanium monoxide, TiO x , species possessing a low band gap (1.29 eV) value and hierarchical morphology have been prepared.…”