RT journal article
T1 Flash combustion synthesis using two different fuels and characterization of LiF-doped TiO2 for the photocatalytic applications
A1 Zahwa, I.
A1 Mouyane, M.
A1 Kassas, A.
A1 Ngueteu Kamlo, A.
A1 Moslah, C.
A1 Navas Pineda, Francisco Javier
A1 Livraghi, S.
A1 Bernard, J.
A1 El Falah, J.
A1 Toufaily, J.
A1 Hamieh, T.
A1 Houivet, D.
A2 Química Física
K1 Flash combustion synthesis
K1 Fuels
K1 TiO2–LiF
K1 Nanoparticles
K1 Photocatalytic activity
AB The flash combustion method was used to prepare LiF-doped TiO2 photocatalysts materials using glycine or ureaas a fuel with different weight percentage of LiF. The synthesized powders have been characterized by thermogravimetric analysis (TG), scanning electron microscope (SEM) with energy dispersive spectrometer (EDX)analyzer, the specific surface area measurement was performed by BET. The crystallization and the phasetransformation anatase-rutile for the powders have been verified by XRD. SEM micrographs for these powdersshows the presence of nanoparticles. To investigate the optical band gap of the synthesized samples, UV–Visspectroscopy was conducted using the diffuse reflectance mode (DRS). The O2− /F− substitution and the presenceof Ti3+ centers was confirmed by electron paramagnetic resonance (EPR) analysis. The photocatalytic activity ofthe TiO2-xLiF powders were evaluated through the photocatalytic degradation of Methylene blue (MB) in waterunder UV–visible light exposure. The results indicated that during the flash combustion synthesis, the nature ofthe fuel and the percentage of the doping element led to the presence of different polymorphs of TiO2 whichinfluences the photocatalytic efficiency attributed to the synergistic effect between the two phases (anatase andrutile). The LiF-doped TiO2 powders synthesized by flash combustion in both cases (by using glycine or urea)showed high performance in MB degradation compared to commercial TiO2 and undoped synthesized TiO2powders, with an optimal degradation of 99 % achieved with 2 wt % LiF-doped TiO2 using glycine as a fuel andafter 6 h of UV–Vis irradiation.
SN 2666-5395
YR 2024
FD 2024-03-04
LK http://hdl.handle.net/10498/32890
UL http://hdl.handle.net/10498/32890
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 10-nov-2026