Characterization of Ce2(WO4)3 nanocrystals for potential applications

Jose, Anjaly; John, Mathew; Hitha, H.; Kuriakose, Soumya; Baiju, K P; Varghese, Thomas

doi:10.1016/j.rsurfi.2021.100020

Cited by 8 publications

(4 citation statements)

References 27 publications

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“…The photoluminescence emission spectra of pure and lanthanum doped samples are shown in 'figure 6' at an excitation wavelength of 380 nm. Spread-eagle shape of PL emission is observed for the pure and doped Ce 2 (WO 4 ) 3 samples ('figure 6') [20]. The main broad emission peak is a recombination of three different Gaussian peaks.…”

Section: Photoluminescence Spectroscopymentioning

confidence: 93%

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Influence of lanthanum doping on the structural and optical properties of cerium tungstate nanocrystals

Jose¹,

Hitha²,

Kuriakose³

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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In this study, the effect of lanthanum (La) doping on the structural and optical properties of cerium tungstate nanocrystals synthesized by the chemical precipitation method is investigated. The X-ray diffraction studies confirmed the crystalline phase formation and observed no phase change with doping. It is interesting to note that the crystallite size is decreased with La doping. The characteristic vibrational peaks of W-O bonds are confirmed from the FTIR and Raman spectroscopic studies and found no appreciable changes in the spectral positions with doping. The optical properties are studied using UV-Vis spectroscopy and photoluminescence spectroscopy. The characteristic broad blue PL emission from the tetrahedral tungstate group is observed for the pure and doped samples, and the appreciable variation in PL intensity can be associated with the formation of defects that occurred while doping.

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Section: Photoluminescence Spectroscopymentioning

confidence: 93%

“…It is due to the influence of the Jahn-Teller effect on the degenerated excited state of WO 4 tetrahedra [21]. The deconvoluted Gaussian peaks centred at 416, 440 and 467 nm ('figure 7') are the respective emissions from the 1 T 1 , 3 T 2 and 3 T 1 bands to the 1 A 1 ground state of tetrahedral tungstate group [20].…”

Section: Photoluminescence Spectroscopymentioning

confidence: 99%

Influence of lanthanum doping on the structural and optical properties of cerium tungstate nanocrystals

Jose¹,

Hitha²,

Kuriakose³

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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“…The distinct X-ray's energy and the variation in energies between the two lobes that are produced can be used to identify an entity's component constitution. The qualitative composition of the sample can be obtained from the position of the peak [90].…”

Section: Edax Techniquesmentioning

confidence: 99%

Structural Morphology and Optical Properties of Strontium-Doped Cobalt Aluminate Nanoparticles Synthesized by the Combustion Method

Kanithan

Vignesh²,

Baskar³

et al. 2022

Materials

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The study of structural morphology and the optical properties of nanoparticles produced by combustion methods are gaining significance due to their multifold applications. In this regard, in the present work, the strontium-doped cobalt aluminate nanoparticles were synthesized by utilizing Co1−xSrxAl2O4 (0 ≤ x ≤ 0.5) L-Alanine as a fuel in an ignition cycle. Subsequently, several characterization studies viz., X-ray diffraction (XRD), energy-dispersive X-ray (EDX) analysis, high-resolution scanning electron microscopy (HRSEM), Fourier transform infrared spectroscopy (FTIR), ultraviolet (UV) spectroscopy and vibrating sample magnetometry (VSM) were accomplished to study the properties of the materials. The XRD analysis confirmed the cubic spinel structure, and the average crystallite size was found to be in the range of 14 to 20 nm using the Debye–Scherrer equation. High-resolution scanning electron microscopy was utilized to inspect the morphology of the Co1−xSrxAl2O4 (0 ≤ x ≤ 0.5) nanoparticles. Further, EDS studies were accomplished to determine the chemical composition. Kubelka–Munk’s approach was used to determine the band gap, and the values were found to be in the range of 3.18–3.32 eV. The energy spectra for the nanoparticles were in the range of 560–1100 cm−1, which is due to the spinel structure of Sr-doped CoAl2O4 nanoparticles. The behavior plots of magnetic induction (M) against the magnetic (H) loops depict the ferromagnetic behavior of the nanomaterials synthesized.

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“…Regarding the optical characterization of materials, UV-vis diffuse Reflectance Spectroscopy (DRS) is widely used technique to investigate the absorption of light by amorphous and polycrystalline materials [8]. For this propose, a plethora of studies have used the Kubelka-Munk (K-M) model and Tauc plot to determine the 𝐸 𝑔 of semiconductor materials in the form of powders (non-single-crystal) [9][10][11].…”

Section: Introductionmentioning

confidence: 99%