In situ formation of defect-engineered N-doped TiO₂ porous mesocrystals for enhanced photo-degradation and PEC performance

Abstract

N-Doped oxygen defective N/TiO2−x mesocrystal nanocubes were prepared from NH4TiOF3 mesocrystals by a facile crystal topotactic transformation strategy. The products exhibited high photoelectrochemical and photocatalytic degradation performance under visible light illumination.

Facet-engineered TiO2 nanomaterials reveal the role of water–oxide interactions in surface protonic conduction

“…To synthesize anatase TiO 2 with a predominance of the {100} facet (T100), a similar procedure was used. In the rst hydrothermal process, instead of using P25, TiO 2 nanoparticles were prepared according to a previously reported method 20 and used as precursor to synthesize potassium titanate nanotubes. The as-synthesized nanotubes were washed with deionized water, dried at 80 C. In the second hydrothermal process, pH was kept neutral.…”

Titanium Dioxide: From Engineering to Applications

“…Considering the aforementioned merits of mesocrystal nanomaterials, we recently tried different approaches to further improve the optical absorption properties of TiO 2 mesocrystals, in addition to their enhanced transfer and separation properties. Oxygen vacancies and N dopants were successfully introduced into the TiO 2 lattice with a facile low temperature calcination process [108], as shown in Figure 19. NH 4 TiOF 3 mesocrystal nanocubes were used as precursors in our system, and topological transformation from NH 4 TiOF 3 to TiO 2 facilitated the release and doping of nitrogen.…”

“…X-ray powder diffraction (XRD) pattern of (a) NH4TiOF3 and (b) N/TiO2−x. SEM images of (c,e) NH4TiOF3 and (d,f) N/TiO2−x[108]. Copyright 2019 The Royal Society of Chemistry.…”

N, H Dual‐Doped Black Anatase TiO2 Thin Films toward Significant Self‐Activation in Electrocatalytic Hydrogen Evolution Reaction in Alkaline Media

“…The stretching frequencies in the range of 3500-3700 cm À1 correspond to amine N-H stretching and the peak at 1520 cm À1 corresponds to N-H bending mode. [39] To understand the role of N doping in TiO 2 further, the valance band spectra (VBS) were also recorded, which are shown in Figure 1d. It can be clearly seen that N and H doping introduces new electronic states close to the VBM of TiO 2 .…”