Structural and optical investigations on sprayed Co doped La2O3 thin films along with photocatalytic and anti-bacterial applications

Jbeli, R.; Lahmar, M.; Bilel, C.; Saadallah, F.; Ouzari, Hadda; Bouaïcha, M.; Amlouk, M.

doi:10.1016/j.ijleo.2021.166837

Cited by 21 publications

(7 citation statements)

References 33 publications

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“…As Al doping rate increases (10% and 15%) (see Figure 4c,d) the mixture forms a thin cracked layer on La 2 O 3 film with some spherical grains of the perovskite LaAlO 3 scattered at the top surface. The same morphology is observed previously 25,26 …”

Section: Resultssupporting

confidence: 89%

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Synthesis and physical investigation of Al doped La₂O₃ thin films for wettability applications

Jbeli,

Dabaki,

Ahmed

et al. 2024

Env Prog and Sustain Energy

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In this work, aluminum doped La2O3 thin films deposited by the spray pyrolysis technique, are investigated by many characterization techniques. First, XRD spectra reveal the presence of two phases. A dominant cubic phase is obtained for pure La2O3 with (220) preferential orientation. The second hexagonal phase with (004) orientation is present in all doped samples. It is found that Al doping induces a perovskite crystalline structure identified as lanthanum aluminate (LaAlO3). Second, FTIR spectra include the main peaks of La‐O bonds related to La2O3 structure. Photoluminescence (PL) shows a good enhancement by Al doping related to LaAlO3 nanoparticles. Finally, the surface wettability measurements corroborate the hydrophobic character of all doped samples.

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Section: Resultssupporting

confidence: 89%

“…The same morphology is observed previously. 25,26 F I G U R E 7 Deconvolutions with Gaussian curves for the undoped and Al doped La 2 O 3 thin films.…”

Section: Sem Observationsmentioning

confidence: 99%

Synthesis and physical investigation of Al doped La₂O₃ thin films for wettability applications

Jbeli,

Dabaki,

Ahmed

et al. 2024

Env Prog and Sustain Energy

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“…The formation of the F 2g vibration band indicates that the La 3+ -doped CeO 2 samples form the complete cubic fluorite structure. Meanwhile, no absorption peaks of La 2 O 3 species are found (the bands representing the La–O vibration and E gν1 mode at 337 and 442.52 cm –1 were not detected, respectively), which corresponds to the XRD results. The F 2g peak of Ce 1– x La x O 2 samples gradually shifted in the direction of the low wavelength (463.39, 458.65, 457.07, 453.90 cm –1 ) with the increase in La 3+ doping.…”

Section: Resultsmentioning

confidence: 58%

Enhancing the Polishing Efficiency of CeO₂ Abrasives on the SiO₂ Substrates by Improving the Ce³⁺ Concentration on Their Surface

Luo

et al. 2022

ACS Appl. Electron. Mater.

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The polishing activity of CeO 2 abrasives is enhanced by improving the Ce 3+ concentration on their surface. In this study, a series of Ce 1−x La x O 2 abrasives with different La 3+ doping were prepared. The abrasives were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy. The effects of La 3+ doping on the morphology, size, and Ce 3+ concentration of the abrasives were studied. The morphology of the particles changes from sphere to octahedron with the La 3+ doping. The lattice expansion of the CeO 2 crystal after La 3+ doping also significantly improves the Ce 3+ concentration on the abrasive surface. However, the Ce 3+ concentration on the surface gradually became saturated when the x was 0.2 or more. The polishing performance proved that the material removal rate (MRR) is closely related to the Ce 3+ concentration generated by La 3+ doping. The MRR of pure CeO 2 abrasives with a Ce 3+ concentration of 20.53% on a SiO 2 substrate is 59.31 nm/min, while the Ce 0.7 La 0.3 O 2 abrasives with the Ce 3+ concentration increased to 34.41% achieved 101.12 nm/min. The polished surface quality was characterized by atomic force microscopy, which shows improved roughness of all samples. Furthermore, the differences in the removal rate of Ce 3+ and Ce 4+ in CeO 2 -based abrasives on the SiO 2 substrate were also discussed.

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“…The first peak is correlated with inter-band transitions in La2O3. The second peak is the result of cation vacancy defects in La2O3 [49,50]. The third peak results from radiative relaxational transitions phenomena of La 3+ ions [51].…”

Section: Pl Analysismentioning

confidence: 99%

Investigating the Physical and Electrical Properties of La 2 O 3 Via Annealing of La(OH) 3

Ismail,

Belal,

Abdo

et al. 2023

Preprint

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A simple technique was used to fabricate pure La2O3 nanorods with a hexagonal structure using lanthanum (III) nitrate hexahydrate (La(NO3)3.6H2O) and ammonia (NH4OH). The La2O3 nanoparticles were characterized using XRD, TGA, Raman, SEM, FTIR, PL spectroscopy, and Mott-Schottky. XRD analysis showed the production of La(OH)3 nanorods under appropriate conditions, which were then successfully converted into La2O2CO3 and finally into La2O3 nanorods by annealing. TGA revealed that the total weight loss was caused by water evaporation and the dissolution of the minimal quantity of moisture present in the manufactured La2O3 NPs observed from the environment. The presence of functional groups was verified through FTIR analysis. Additionally, SEM revealed changes in morphology. PL findings displayed three emission peaks at 390, 520, and 698nm due to interband transitions and defects in the samples. Mott–Schottky analysis demonstrated that the flatband potential and acceptor density varied with annealing temperature, ranging from 1 to 1.2 V and 2 × 1018 to 1.4×1019 cm-3, respectively. Furthermore, annealing at 1000°C resulted in the lowest resistance to charge transfer (Rct).

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Structural and optical investigations on sprayed Co doped La2O3 thin films along with photocatalytic and anti-bacterial applications

Cited by 21 publications

References 33 publications

Synthesis and physical investigation of Al doped La₂O₃ thin films for wettability applications

Synthesis and physical investigation of Al doped La₂O₃ thin films for wettability applications

Enhancing the Polishing Efficiency of CeO₂ Abrasives on the SiO₂ Substrates by Improving the Ce³⁺ Concentration on Their Surface

Investigating the Physical and Electrical Properties of La 2 O 3 Via Annealing of La(OH) 3

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Structural and optical investigations on sprayed Co doped La2O3 thin films along with photocatalytic and anti-bacterial applications

Cited by 21 publications

References 33 publications

Synthesis and physical investigation of Al doped La2O3 thin films for wettability applications

Synthesis and physical investigation of Al doped La2O3 thin films for wettability applications

Enhancing the Polishing Efficiency of CeO2 Abrasives on the SiO2 Substrates by Improving the Ce3+ Concentration on Their Surface

Investigating the Physical and Electrical Properties of La 2 O 3 Via Annealing of La(OH) 3

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Product

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Synthesis and physical investigation of Al doped La₂O₃ thin films for wettability applications

Synthesis and physical investigation of Al doped La₂O₃ thin films for wettability applications

Enhancing the Polishing Efficiency of CeO₂ Abrasives on the SiO₂ Substrates by Improving the Ce³⁺ Concentration on Their Surface