A ‘one pot’ gel combustion strategy towards Ti³⁺ self-doped ‘black’ anatase TiO_2−x solar photocatalyst

Abstract

The first one pot gel combustion synthetic strategy towards ‘black TiO2−x’ using Ti butoxide, diethylene glycol and water as the only precursors.

Facile Strategy to Fabricate Uniform Black TiO2 Nanothorns/Graphene/Black TiO2 Nanothorns Sandwichlike Nanosheets for Excellent Solar‐Driven Photocatalytic Performance

“…The C 1s XPS region of G@BTN nanosheets can be deconvoluted into three peaks, as shown in Figure A, which are ascribed to sp 2 ‐bonded carbon (C−C, 284.8 eV), epoxy/hydroxyl (C−O, 286.9 eV), epoxy/hydroxyl (O−C=O, 288.9 eV) . Compared with the spectrum of GO (C 1s), the shoulder peak intensities at high binding energy of G@BTN nanosheets were weakened, indicating the efficient deoxygenation and reduction of the sample surface after hydrogen treatment, which is consistent with the literature . As shown in Figure B, the XPS (Ti 2p) spectra of G@BTN nanosheets exhibit two small peaks located at 457.9 and 463.5 eV, which are consistent with the characteristic of Ti 2p 3/2 and Ti 2p 1/2 peaks for Ti 3+ , these peaks transferred to lower binding energy compared to Ti 4+ , indicating a different bonding environment and the presence of Ti 3+ in black TiO 2 nanothorns …”

Controllable Synthesis of Inverse Opal TiO2‐x Photonic Crystals and Their Photoelectric Properties

“…As shown in Figure4D, the main peak at 529.5 eV can be assigned to the Ol attice of TiO 2 ,a nd the other peak locateda t 532.3 eV can be ascribed to lattice oxygen( Ti-O) andh ydroxyl group (-OH). [26] Thed ata of Raman and XPS spectra suggest that reduced Ti atoms/oxygen vacancies were introduceds uccessfully.I ti sa lso provedt hat DCDA can be ak ind of cheap, safe and controllable reducinga gent in this new two-step calcination method.…”

Band Gap Modification of Tio2 Using Solid State Reaction with Hydrides in Argon Atmosphere

“…21-1276). However, there is a significant peaks broadening and shifting in 2θ values to higher values after reduction reaction due to formation oxygen vacancies and lattice strains (21,22). The crystallite size of prepared and modified Tio2 calculated using Scherrer equation 23: D = 0.9 λ / βcosθ where D = crystallite size β = full width at half maximum intensity θ = diffraction angle 0.9 = shape factor As shown in table(2) , the cell parameters and cell volume of modified tio2 lower than that as-prepared tio2, also, we can note that the crystallite size of modified tio2 smaller than that for reduced tio2 which is derived from oxygen vacancies induced lattice strains and slightly reduced crystal size and lattice contraction (24,25,26).…”