Synthesis of Pure and Fe-Doped TiO₂ Nanoparticles via Electrospray-Assisted Flame Spray Pyrolysis for Antimicrobial Applications

Synergizing ICP-MS, STEM-EDXS, and SMPS single particle analytics exemplified by superlattice L10 Pt/Fe aerosol nanoparticles produced by spark ablation

“…5a and b ) require the spICP-MS device to be calibrated by aerosol NPs instead of a classical calibration from a particle suspension or an ionic standard solution, since the background signal changes dramatically when either a liquid or a gas carries the analyte. For TiO 2 NPs, the aerosol calibration of the spICP-MS device was reported in a recent work 36 but will be discussed briefly with special attention to pure metallic (Pt/Fe) and metal oxide (Pt/Fe 2 O 3 ) aerosol NPs. First, spherical NPs made of pure platinum were produced by spark ablation and subsequent sintering in a tube furnace at 1300 °C.…”

Linking the Doping-Induced Trap States to the Concentration of Surface-Reaching Photoexcited Holes in Transition-Metal-Doped TiO2 Nanoparticles

“…When TiO 2 nanoparticles were doped with Fe, Co, or Cu, an evident red shift in light adsorption was observed. This may possibly be due to the charge-transfer transition between the Fe, Co, or Cu 3d-electrons and the conduction or valence band of TiO 2 ; or doping-induced defects associated with oxygen vacancies , that give rise to colored centers; or solely to the presence of Fe, Co, or Cu oxide. The bandgap values of TiO 2 samples with and without doping were calculated as 3.24 eV (TiO 2 ), 3.19 eV (Co/TiO 2 ), 3.20 eV (Cu/TiO 2 ), and 3.18 eV (Fe/TiO 2 ).…”