Structural, microstructural and vibrational analyses of the monoclinic tungstate BiLuWO6

Ahsaine, Hassan Ait; Taoufyq, A.; Patout, L.; Ezahri, M.; Benlhachemi, A.; Bakiz, B.; Villain, S.; Guinneton, F.; Gavarri, J.R.

doi:10.1016/j.jssc.2014.06.014

Cited by 14 publications

(15 citation statements)

References 26 publications

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“…For 5%wt La rate, the refined Zn/La occupancy at the Wyckoff position 2b site was in excellent agreement with the nominal composition. The minimization was carried out using the reliability index parameters such as Braggs factors ( R Bragg ) comparing the calculated and observed intensities (I ca l and I obs ), R exp expected factors, R wp and the goodness of fit GoF ,. The difference between the calculated and experimental profiles is shown in figure b .…”

Section: Resultsmentioning

confidence: 99%

Photo/Electrocatalytic Properties of Nanocrystalline ZnO and La–Doped ZnO: Combined DFT Fundamental Semiconducting Properties and Experimental Study

Ahsaine

Slassi

Naciri³

et al. 2018

ChemistrySelect

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This work reports the synthesis of nanocrystalline ZnO and 5% La‐doped ZnO (La/ZnO) materials for photo/electrocatalytic degradation of Rhodamine B. The samples were characterized by X‐Ray diffraction, scanning and transmission electron microscopy, X‐Ray photoelectron spectroscopy and diffuse reflectance spectra. The effect of La doping on electronic structure was investigated using density functional theory calculations (DFT), La‐doped ZnO showed an n‐type metallic nature compared to pristine ZnO and La doping creates occupied states within the band gap edge. Under UV light, La/ZnO showed higher kinetic constant and efficiency than ZnO. A possible mechanism was elaborated on the basis of DFT and active trapping measurements. Different initial Rhodamine B concentration were studied to assess the electro‐oxidation of RhB. The electrochemical degradation of RhB over La/ZnO spindles electrode was pronounced with three time's high kinetic constant. The superior electro/photoactivity of La/ZnO was due to its unique morphology, high charge separation of the charge carriers and higher conductivity induced by La‐doping (intermediary levels). Superoxide ions and holes were the main active species for the photodegradation. Whereas, synergetic effect of hydroxyl radicals and hypochlorite ions were responsible of the high RhB electrocatalytic degradation.

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Section: Resultsmentioning

confidence: 99%

Photo/Electrocatalytic Properties of Nanocrystalline ZnO and La–Doped ZnO: Combined DFT Fundamental Semiconducting Properties and Experimental Study

Ahsaine

Slassi

Naciri³

et al. 2018

ChemistrySelect

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“…Double perovskite (DP)‐structured tungstate (A 2 BWO 6 ) compounds have been explored experimentally as well as theoretically since the 1950s. [ 14–35 ] The simplicity of their crystal structure and their diverse physical properties, such as ferroelectric, dielectric, [ 21,22,32 ] ferromagnetic, [ 15,23 ] photocatalytic, [ 26 ] photoluminescence (PL), [ 17,18,35 ] and magnetoresistance properties, [ 33 ] continue to fascinate researchers to explore DP‐structured tungstate for different applications. The physical properties of DP‐structured tungstate mainly depend upon the choice of the pair of A 2+ and B 2+ ions, which leads to different possibilities of crystallization of a compound in phases such as cubic, orthorhombic, and monoclinic.…”

Section: Introductionmentioning

confidence: 99%

Luminescence Properties of Rare Earth–Doped Cubic Double Perovskite Tungstate Ba_2(1−x)(Na,RE)_xZnWO₆ (RE = Ce³⁺, Eu³⁺ and Dy³⁺) Phosphors

Dabre¹,

Wani

Dhoble

et al. 2021

Physica Status Solidi (b)

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Herein, the photoluminescence (PL) and thermoluminescence (TL) properties of rare earth doped cubic double perovskite tungstate Ba2(1−x)(Na,RE)xZnWO6 (RE = Ce3+, Eu3+ and Dy3+) phosphors synthesized by the solid‐state reaction method are presented. The self‐luminescence of pure Ba2ZnWO6 material in the blue‐green region is enhanced by Ce3+ doping with its most effective concentration of 3 mol%. The dominant emission in orange (of Eu3+ at 597 nm) and blue (of Dy3+ at 485 nm) region in the emission spectra of Ba2(1−x)(Na,Eu)xZnWO6 and Ba2(1−x)(Na,Dy)xZnWO6 phosphor, respectively, shows highest intensity for 3 mol% of Eu3+ and 2 mol% of Dy3+ ion in the host lattice. The broad excitation band of Ce3+ and Dy3+ doped phosphor in the near UV region claims its candidature for solid‐state lighting. TL studies are also performed using γ‐radiation. Pure host material shows a simple glow curve while the rare earth ion doped phosphor shows a complex glow curve with enhanced intensity. Phosphor shows the fairly linear response up to 1 kGy radiation. Glow curves are deconvoluted and the trap parameters are calculated by Chen's peak shape method.

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“…Bismuth tungstate Bi2WO6 (BWO) is the simplest member of the Aurivilius family and it is a very promising material due its potential applications in different areas such as photocatalysis [15,16], luminescence, chemical inertness, photo-stability, and environmentally friendly features [17][18][19][20]. The PANi with an extended π-conjugated electron, has recently showed great promises [21] as it is supporter for the large specific surface area and the excellent electronic conductivity due to its important intrinsically conducting polymers.…”

Section: Introductionmentioning

confidence: 99%

Congo red removal by PANi/Bi2WO6 nanocomposites: Kinetic, equilibrium and thermodynamic studies

Laabd

Ahsaine

Jaouhari

et al. 2016

Journal of Environmental Chemical Engineering

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Structural, microstructural and vibrational analyses of the monoclinic tungstate BiLuWO6

Cited by 14 publications

References 26 publications

Photo/Electrocatalytic Properties of Nanocrystalline ZnO and La–Doped ZnO: Combined DFT Fundamental Semiconducting Properties and Experimental Study

Photo/Electrocatalytic Properties of Nanocrystalline ZnO and La–Doped ZnO: Combined DFT Fundamental Semiconducting Properties and Experimental Study

Luminescence Properties of Rare Earth–Doped Cubic Double Perovskite Tungstate Ba_2(1−x)(Na,RE)_xZnWO₆ (RE = Ce³⁺, Eu³⁺ and Dy³⁺) Phosphors

Congo red removal by PANi/Bi2WO6 nanocomposites: Kinetic, equilibrium and thermodynamic studies

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Structural, microstructural and vibrational analyses of the monoclinic tungstate BiLuWO6

Cited by 14 publications

References 26 publications

Photo/Electrocatalytic Properties of Nanocrystalline ZnO and La–Doped ZnO: Combined DFT Fundamental Semiconducting Properties and Experimental Study

Photo/Electrocatalytic Properties of Nanocrystalline ZnO and La–Doped ZnO: Combined DFT Fundamental Semiconducting Properties and Experimental Study

Luminescence Properties of Rare Earth–Doped Cubic Double Perovskite Tungstate Ba2(1−x)(Na,RE)xZnWO6 (RE = Ce3+, Eu3+ and Dy3+) Phosphors

Congo red removal by PANi/Bi2WO6 nanocomposites: Kinetic, equilibrium and thermodynamic studies

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Luminescence Properties of Rare Earth–Doped Cubic Double Perovskite Tungstate Ba_2(1−x)(Na,RE)_xZnWO₆ (RE = Ce³⁺, Eu³⁺ and Dy³⁺) Phosphors