In situ Fe(III)-doped TiO2 mesocrystals catalyzed visible light photo-Fenton system

Controversial mechanism of simultaneous photocatalysis and Fenton-based processes: additional effect or synergy?

“…Although the degradation of this pesticide reached 100% under UVA in the presence of H 2 O 2 after 1h reaction, this synergy might be an additional effect since photocatalysis can degrade about 25% while Fenton-based processes and H 2 O 2 photolysis were not tested. On the other hand, Q. Zhao et al 68 have reported the efficient degradation of 4-chlorophenol by synergy between photocatalysis and photo-Fenton in system containing Fedoped TiO 2 in the presence of visible light and H 2 O 2 . However, the separated processes, i.e., H 2 O 2 photolysis, photocatalysis and Fenton have not been individually assessed, thus the observed synergy is hypothetical.…”

Permanently Polarized Materials: An Approach for Designing Materials with Customized Electrical Properties

“…Metal-oxide-based catalysts are the most relevant candidates to be considered since higher catalytic yields and selectivity are expected. − Within this context, the permanent polarization state introduces a breakthrough idea regarding the use of polarized supports that, instead of acting solely as a mechanical support to stabilize and increase the surface-to-volume ratio, also contributes electronically to the catalytic reaction, as shown for HAp-TiO 2 catalysts. Finally, piezoelectric materials also deserve attention due to the high amount of electrical charge generated under mechanical stress, which could result in an outstanding catalytic activation if properly stabilized in the permanent polarized state.…”

Investigation of Morphological, Elemental, Structural, and Optical Properties of Fe-Doped TiO2 Nanoparticles

“…Figure 1 shows the SEM images of Fe-doped TiO2 nanoparticles at different magnification widths and views fields 5.49mm, 171µm, 5.46mm, 65µm, 5.47mm, 33.3µm, 5.47mm, 16.5µm, 5.49mm, 3.29µm and 5.48mm, 1.67µm respectively (Zhao, Ren, Huang, Chen, & Bian, 2022). In picture E, at the magnification of 1µm, the radius of doped nanoparticles at different points is given at C1 70.38nm, C2 66.15nm, and C3 74.91nm.…”