Optical and structural properties of nanostructured CeO2:Tb3+ film

Ansari, Anees A.; Singh, Surinder P.; Malhotra, Bansi D.

doi:10.1016/j.jallcom.2010.07.009

Cited by 48 publications

(21 citation statements)

References 33 publications

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“…Figure 6 shows the room-temperature optical absorption spectra of undoped and Mn-doped CeO 2 nanoparticles. The spectra distinctly exhibited a strong absorption band at the UV region due to charge-transfer transitions from O2p to Ce4f and block damage by UV radiation [30]. However, no absorption is detected above 500 nm in wavelength.…”

Section: Optical Propertiesmentioning

confidence: 97%

Synthesis, Structural and Optical Properties of Mn-Doped Ceria Nanoparticles: A Promising Catalytic Material

Ansari

Labis

Alam

et al. 2016

Acta Metall. Sin. (Engl. Lett.)

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The structure, the morphology and the thermal, optical and the surface properties of nanocrystalline CeO 2 doped with Mn have been studied by X-ray diffraction (XRD), field-emission transmission electron microscopy (FE-TEM), energy-dispersive X-ray analysis, thermogravimetric analysis, UV-Vis absorption spectroscopy and Fourier transform infrared spectroscopy. The XRD results confirmed the successful incorporation of Mn into the CeO 2 lattice through the formation of nanoscale face-centered cubic solid solution. The FE-TEM observations supported the nanocrystalline nature of the solid solutions. The presence of structural defects and their role on the band gap have been discussed on the basis of absorption spectral studies. The structural differences correlate with results from temperature-programmed reaction (TPR) experiments with H 2 consumption. The TPR measurements showed an enhanced bulk reduction at much lower temperatures, indicating increased oxygen mobility in the samples, which enable to enhanced oxygen diffusion at lower temperatures.

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Section: Optical Propertiesmentioning

confidence: 97%

Synthesis, Structural and Optical Properties of Mn-Doped Ceria Nanoparticles: A Promising Catalytic Material

Ansari

Labis

Alam

et al. 2016

Acta Metall. Sin. (Engl. Lett.)

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“…[1][2][3][4][5]. Nanostructured CeO 2 possesses superior physical and chemical properties compared with its bulk counterparts [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Facile hydrothermal synthesis of CeO2 nanosheets with high reactive exposure surface

Liu

et al. 2011

Journal of Alloys and Compounds

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“…Ce 4C (ligand-to-metal charge-transfer, LMCT) transitions to the emitter level of Sm 3C ion in Sm-doped ceria. [42] A significant enhancement in the emission band is observed in the spectrum of pure nanostructured CeO 2 when compared to the Zr-doped CeO 2 which could be due to the fact that the d electrons of cerium couple differently to the lattice phonon in the cubic fluorite structure. [43] Similar behaviour has been reported for ceria synthesised by sol gel route.…”

Section: Photoluminescence (Pl) Studiesmentioning

confidence: 94%

Absorption and emission properties of Zr-doped nanoceria synthesised by co-precipitation-hydrothermal treatment route

Sahoo

Mohapatra

Anand

2014

Journal of Experimental Nanoscience

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A series of nanoceria samples doped with zirconium (nil to 2 mol%) and a typical sample doped with 1 mol% each of Zr and Eu were synthesised following coprecipitation-hydrothermal treatment route. The main peaks in X-ray diffraction (XRD) patterns of all the samples corresponded to (111), (200), (220) and (311) planes of cubic ceria. The Fourier transform infrared spectra showed bands which were indicative of formation of nanoceria with intercalated/adsorbed water. In Raman spectra, a sharp and intense Raman shift at around 460À462 cm ¡1 was observed for all the samples and the peak intensity decreased with increase in mol% doping of Zr. In case of ZrÀEu-doped sample the peak intensity was similar to the undoped ceria. The decrease in intensity could be due to accumulation/precipitation of more numbers of Zr ions on the surface rather than incorporation into ceria lattice. The indirect band gaps estimated from ultravioletÀvisible absorption spectra were smaller when compared to the direct ones. The smaller indirect band gaps indicate that Zr-doped nanoparticles with a higher fraction of atoms residing at the surface were available to assist the indirect electron transition from the valence band to the conduction band. Emission spectra obtained by exciting at 300 and 500 nm for all samples are discussed in details. Transmission electron microscope image of a typical sample showed mono-dispersed uniform sized single crystalline doped ceria.

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Optical and structural properties of nanostructured CeO2:Tb3+ film

Cited by 48 publications

References 33 publications

Synthesis, Structural and Optical Properties of Mn-Doped Ceria Nanoparticles: A Promising Catalytic Material

Synthesis, Structural and Optical Properties of Mn-Doped Ceria Nanoparticles: A Promising Catalytic Material

Facile hydrothermal synthesis of CeO2 nanosheets with high reactive exposure surface

Absorption and emission properties of Zr-doped nanoceria synthesised by co-precipitation-hydrothermal treatment route

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