Controllable synthesis and luminescence properties of one-dimensional La2O3 and La2O3:Ln3+ (Ln = Er, Eu, Tb) nanorods with different aspect ratios

Yu, Linkang; Han, Yu; Lin, Runlian; Ge, Kun; Zhang, Cuimiao; Zhang, Jinchao

doi:10.1016/j.jlumin.2020.117663

Cited by 11 publications

(5 citation statements)

References 47 publications

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“…The aim was to identify the functional groups present in the prepared samples 51 . The wide peak observed at 3609 cm −1 indicates the presence of O–H stretching vibration due to absorbed moisture on the nanoparticle surfaces 3 , 52 . The bands at 1620 cm −1 and 1366 cm −1 are caused by the O–H vibration in absorbed water on the sample surface 24 , 53 .…”

Section: Resultsmentioning

confidence: 99%

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Investigating the physical and electrical properties of La2O3 via annealing of La(OH)3

Ismail,

Belal,

Abdo

et al. 2024

Sci Rep

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A simple technique was utilized to fabricate pure hexagonal La2O3 nanorods by utilizing lanthanum(III) nitrate hexahydrate (La(NO3)3·6H2O) and ammonia (NH4OH). The La2O3 nanoparticles were analyzed using XRD, TGA, Raman, SEM, FTIR, TEM, PL spectroscopy, and Mott–Schottky techniques. The XRD analysis confirmed the production of La(OH)3 nanorods under appropriate conditions, which were then successfully converted into La2O2CO3 and finally into La2O3 nanorods through annealing. The TGA analysis showed that the total weight loss was due to water evaporation and the dissolution of minimal moisture present in the environment. The FTIR analysis confirmed the presence of functional groups. The SEM analysis revealed changes in morphology. The TEM analysis to determine the particle size. The PL findings showed three emission peaks at 390, 520, and 698 nm due to interband transitions and defects in the samples. The 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. Annealing at 1000 °C resulted in the lowest resistance to charge transfer (Rct).

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Section: Resultsmentioning

confidence: 99%

“…It appears as a white solid that is insoluble in water. However, it can dissolve in acidic solutions and convert into lanthanum hydroxide upon absorbing moisture from the air 3 . La 2 O 3 is considered one of the most desirable oxide semiconductors due to its unique chemical and physical properties.…”

Section: Introductionmentioning

confidence: 99%

Investigating the physical and electrical properties of La2O3 via annealing of La(OH)3

Ismail,

Belal,

Abdo

et al. 2024

Sci Rep

View full text Add to dashboard Cite

show abstract

“…The aim was to identify the functional groups present in the prepared samples [43]. The wide peak observed at 3609 cm -1 indicates the presence of O-H stretching vibration due to absorbed moisture on the nanoparticle surfaces [3,44]. The bands at 1620 cm -1 and 1366 cm -1 are caused by the O-H vibration in absorbed water on the sample surface [24,45].…”

Section: Fourier Transform Infrared Spectroscopy Analysismentioning

confidence: 99%

“…Among those oxides, Lanthanum oxide (La2O3) is a p-type semiconductor and has a hexagonal phase structure [2]. It's a white solid that doesn't dissolve in water however, it dissolves in acidic solutions and can be converted to lanthanum hydroxide after absorbing moisture from the air [3].…”

Section: Introductionmentioning

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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“…Up to now, there are reports of different methods for the La2O3 nanoparticles synthesis including sol-gel [4], sonochemical [7], solvothermal [8], and hydrothermal [9]. A lately reported solvent-deficient method [10] was applied in our research.…”

Section: Introductionmentioning

confidence: 99%

MECHANOCHEMICALLY INDUCED SYNTHESIS OF La2O3

Zeljković

Malinović

Sukur

et al. 2021

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Lanthanum(III)-oxide (La2O3) powders were synthesized by a mechanochemically induced solvent-deficient method using lanthanum nitrate, and ammonium bicarbonate as precursors. The precursor mixture was calcined for one hour at either 600 or 800 °C. This study included an investigation of the formation reactions, crystal structure, specific surface area, and optical properties of synthesized La2O3. The proposed mechanism indicates a complex synthesis with several reactions, some of which are mechanochemically induced. The size of the La2O3 nanocrystallites, as determined by XRD, is 22.15±3.9 nm (by using the Williamson-Hall plot, it is determined that the strain is 1.4×10−3 and crystallite size 30.81 nm) while the specific surface is set to 7.04 m2g-1. The direct bandgap value obtained from reflectance measurement is determined to be 5.37 eV.

show abstract

Controllable synthesis and luminescence properties of one-dimensional La2O3 and La2O3:Ln3+ (Ln = Er, Eu, Tb) nanorods with different aspect ratios

Cited by 11 publications

References 47 publications

Investigating the physical and electrical properties of La2O3 via annealing of La(OH)3

Investigating the physical and electrical properties of La2O3 via annealing of La(OH)3

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

MECHANOCHEMICALLY INDUCED SYNTHESIS OF La2O3

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