Structural and optical properties of CdS nanocrystals embedded in NaCl single crystals

Boudine, B.; Sebais, M.; Halimi, O.; Alliouche, Hayette; Boudrioua, Azzedine; Mouras, Rabah

doi:10.1016/j.cattod.2003.12.004

Cited by 4 publications

(2 citation statements)

References 15 publications

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“…There are several studies addressing optical properties of alkali halide single crystals doped with nano-crystals of semiconductors, such as NaCl:CuCl, KCl:AgCl, KBr:ZnO, NaCl:CdS, and KBr:CdTe. [10][11][12][13][14][15][16] In addition, recently, a great number of studies have been stimulated by alkali halides doped with metal ions like KCl:Ag, KCl:Au, NaCl:Cu, and KCl:Cu. [17][18][19] In the present paper, we investigate the doping effects of CuO nanocrystals on the structural and optical properties of the NaCl single crystals experimentally.…”

Section: Introductionmentioning

confidence: 99%

Structural and optical properties of a NaCl single crystal doped with CuO nanocrystals

Addala¹,

Bouhdjer²,

Chala³

et al. 2013

Chinese Phys. B

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A cupric oxide (CuO) nanocrystal-doped NaCl single crystal and a pure NaCl single crystal are grown by using the Czochralski (Cz) method. A number of techniques, including X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX) analysis, Fourier transform infrared (FT-IR) spectroscopy, Raman spectroscopy, optical absorption in the UV—visible range, and photoluminescence (PL) spectroscopy are used to characterize the obtained NaCl and NaCl:CuO crystals. It is observed that the average radius of CuO crystallites in NaCl:CuO crystal is about 29.87 nm, as derived from the XRD data analysis. Moreover, FT-IR and Raman spectroscopy results confirm the existence of the monoclinic CuO phase in NaCl crystal. UV—visible absorption measurements indicate that the band gap of the NaCl:CuO crystal is 434 nm (2.85 eV), and it shows a significant amount of blue-shift (ΔEg = 1 eV) in the band gap energy of CuO, which is due to the quantum confinement effect exerted by the CuO nanocrystals. The PL spectrum of the NaCl:CuO shows a broad emission band centred at around 438 nm, which is consistent with the absorption measurement.

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Section: Introductionmentioning

confidence: 99%

Structural and optical properties of a NaCl single crystal doped with CuO nanocrystals

Addala¹,

Bouhdjer²,

Chala³

et al. 2013

Chinese Phys. B

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“…With the development of chemical synthesis techniques in the 1990s, the elaboration of nanocrystals has progressed greatly by fabricating nanocrystals with variable geometries and low size dispersions [24]. The use of nanocrystals often requires material supports such as substrates of different shapes or matrices of varying chemical composition [25][26][27][28][29]. To master these new chemical methods of nanomaterials elaboration and to establish the optimal experimental conditions to obtain nanocomposites possessing intense optical activity in the ultraviolet-visible range, we have undertaken the present work which consists of elaborating and characterizing nanocomposites based on the large gap semiconductors ZnO.…”

Section: Introductionmentioning

confidence: 99%

The influence of the Samples thickness on the structural and optical properties of Polyvinyl Chloride/Zinc Oxide Nanocomposite Films: Application in catalytic degradation of methylene blue dye.

Guedri¹,

Zaabat²,

Boudine³

et al. 2021

Preprint

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Considered Technique spin coating of the most important techniques used to prepare thin films because it is easy to use and inexpensive since it is closely dependent on the number of layers deposited. This work aims to study the effect of samples thickness for nanocomposites of polyvinyl chloride doped with zinc oxide nanoparticles on the structural, optical properties, and photocatalytic activities. Nanocomposite films of polyvinyl chloride (PVC) - zinc oxide (ZnO) with a different number of the deposited layers (15, 20, 25, and 30 layers) were synthesized by a sol-gel method (spin coating) using tetrahydrofuran as a solvent, and investigated by various techniques. X-ray diffraction measurements indicated in the case of 15, 20, and 25 layers do not clearly show the presence of diffraction peaks. On the other hand, in the case of 30 layers, the presence of several peaks is observed, which testify to the presence of ZnO crystallites of wurtzite structure in PVC films. The size of the crystallites is almost equal to 32 nm depending on the working conditions. Raman and infrared spectra confirmed the result of X-ray diffraction on the incorporation of ZnO crystallites in the films produced by showing peaks corresponding to the modes of vibration of the crystal lattice of the ZnO doping semiconductor. Optical transmittance spectra have shown that The layers obtained have an optical transmission varying from 75 to 86% in the visible region of the spectrum. The values of the band gap energies, determined from the transmission spectra for the films deposited on glass, vary between 3.45 and 3.94 eV. The Photoluminescence spectra of ZnO/PVC nanocomposites studied revealed a strong ultraviolet and green luminescence, attributed to structural defects in the zinc oxide. The photocatalytic reaction has been shown using MB in the UV irradiation action of films stacked in an MB solution. The result showed that the 30-layer (PVC / ZnO) sample gave an efficiency to remove MB of 79% at 60 min, Similar to other samples which gave a lower efficiency.

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Preparation and dielectric properties of oxide added NaCl–KCl polycrystals

Priya

Mahadevan

2008

Physica B: Condensed Matter

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Structural and optical properties of CdS nanocrystals embedded in NaCl single crystals

Cited by 4 publications

References 15 publications

Structural and optical properties of a NaCl single crystal doped with CuO nanocrystals

Structural and optical properties of a NaCl single crystal doped with CuO nanocrystals

The influence of the Samples thickness on the structural and optical properties of Polyvinyl Chloride/Zinc Oxide Nanocomposite Films: Application in catalytic degradation of methylene blue dye.

Preparation and dielectric properties of oxide added NaCl–KCl polycrystals

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