Structural investigation and scintillation properties of Cd1−xZnxWO4solid solution single crystals

Zhang, Jingfu; Pan, Jingen; Yin, Jie; Wang, Jing; Pan, Jianguo; Chen, Hongbing; Mao, Rihua

doi:10.1039/c4ce02544j

Cited by 5 publications

(4 citation statements)

References 27 publications

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“…Cadmium tungstate CdWO 4 with a monoclinic wolframite structure is one of the widely studied materials in the vast tungstate family because of its high refractive index, chemical/thermal stability, X-ray absorption coefficient, good scintillation, low-radiation damages, and afterglow. − The above unique properties have triggered intense research on the uses of CdWO 4 for potential applications in X-ray and γ-ray detectors, phosphorescence, optical devices, and photocatalysts. − However, the monoclinic CdWO 4 exhibits a diamagnetic property with a wideband gap of 3.7 eV, much larger than the conventional photocatalyst TiO 2 (3.2 eV), limiting its widespread applications. Thanks to technological advancements, the properties of pure compounds can be modulated through size reduction, surface modification, composites, different morphologies, and the introduction of a foreign impurity atom. ,− Many preparation methods have been introduced to form crystalline CdWO 4 nanostructures like microwave, sol–gel, sonochemical, molten salt, and hydrothermal. − Hydrothermal is the most commonly utilized method for synthesizing monoclinic and tetragonal CdWO 4 nanostructures .…”

Section: Introductionmentioning

confidence: 99%

Modulation of Magnetic and Luminescence Properties via Control Cu-Doped in CdWO₄ Nanorods for Photocatalytic Applications

Gandhi

Chiu

et al. 2022

ACS Appl. Nano Mater.

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Monoclinic CdWO4 is a member of the tungstate family with great potential in diverse applications. However, CdWO4 exhibits a diamagnetic property with a wideband gap of 3.7 eV, limiting its widespread applications. This study reports significant modulation of magnetic and optical properties of hydrothermally grown single-crystalline CdWO4 nanorods with controllable substitution of Cu2+ ions at the Cd2+ site. The chemical environment of Cu and the magnetic and luminescence of nanorods were thoroughly investigated using synchrotron-based powder X-ray diffraction, temperature-dependent photoluminescence, X-ray absorption, element selective X-ray excited optical luminescence spectroscopies, a magnetometer, and micro-Raman spectroscopy. The main feature of this study is an astonishing redshift of ∼0.8 eV in the bandgap energy accompanied by a relative ∼46% drop in the internal quantum efficiency and a progressive transition from diamagnetic to an enhanced magnetization concerning the Cu content. The experimental findings show that significant modulation in optical and magnetic properties is correlated with Cu-doping-induced intermediate energy states and [CuO6] ferromagnetic clusters. The outcome of this study provides important insight into designing doped nanomaterials for photocatalytic applications.

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Section: Introductionmentioning

confidence: 99%

Modulation of Magnetic and Luminescence Properties via Control Cu-Doped in CdWO₄ Nanorods for Photocatalytic Applications

Gandhi

Chiu

et al. 2022

ACS Appl. Nano Mater.

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“…In this context, the synthesis and characterization of solid solutions involving metal tungstates such as Sr 1– x Pb x WO 4 , Ca 1– x Sr x WO 4 , Ba 1– x Sr x WO 4 , and Sr 1– x Ba x WO 4 have been performed. The photoluminescence (PL) properties of Ca x Sr 1– x WO 4 and Ca 1– x Cd x WO 4 have been analyzed, while the structures, optical properties, and magnetism have been studied for Zn 1– x Ni x WO 4 , Mn 1– x Cu x WO 4 , Cd 1– x Zn x WO 4 , Ni 1– x Co x WO 4 , Zn 1– x Cu x WO 4 , and Zn 1– x Co x WO 4 …”

Section: Introductionmentioning

confidence: 99%

“…In this context, the synthesis and characterization of solid solutions involving metal tungstates such as Sr 1−x Pb x WO 4 , 36 Ca 1−x Sr x WO 4 , 37 Ba 1−x Sr x WO 4 , 38 and Sr 1−x Ba x WO 4 37 have been performed. The photoluminescence (PL) properties of Ca x Sr 1−x WO 4 39 and Ca 1−x Cd x WO 4 40 have been analyzed, while the structures, optical properties, and magnetism have been studied for Zn 1−x Ni x WO 4 , 41 Mn 1−x Cu x WO 4 , 42 Cd 1−x Zn x WO 4 , 43 Ni 1−x Co x WO 4 , 44 Zn 1−x Cu x WO 4 , 45 and Zn 1−x Co x WO 4 . 46 Our group is engaged in a research devoted to finding a rational synthesis of solid based on the α-Ag 2 WO 4 material, and very recently, we performed a study on the effects of chemical substitution of α-Ag 2−2x Ni x WO 4 solid solutions.…”

Section: Introductionmentioning

confidence: 99%

α-Ag_2–2xZn_xWO₄ (0 ≤ x ≤ 0.25) Solid Solutions: Structure, Morphology, and Optical Properties

et al. 2017

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A theoretical study was elaborated to support the experimental results of the Zn-doped α-AgWO. Theses α-AgZnWO (0 ≤ x ≤ 0.25) solid solutions were obtained by coprecipitation method. X-ray diffraction data indicated that all α-AgZnWO (0 ≤ x ≤ 0.25) microcrystals presented an orthorhombic structure. The experimental values of the micro-Raman frequencies were in reasonable agreement with both previously reported and calculated results. Microscopy images showed that the replacement of Ag by Zn promoted a reduction in the average crystal size and modifications in the morphology, from rod-like with hexagonal shape to roll-like with a curved surface. A theoretical methodology based on the surfaces calculations and Wulff constructions was applied to study the particle shapes transformations and the surface energy variations in α-AgZnWO (0 ≤ x ≤ 0.25) system. The decrease in the band gap value (from 3.18 to 3.08 eV) and the red shift in photoluminescence with the Zn addition were associated with intermediary energy levels between the valence and conduction bands. First-principles calculations with density functional theory associated with B3LYP hybrid functional were conducted. The calculated band structures revealed an indirect band gap for the α-AgZnWO models. The electronic properties of α-AgWO and α-AgZnWO microcrystals were linked to distortion effects and oxygen vacancies (V) present in the clusters, respectively. Finally, photoluminescence properties of α-AgWO and α-AgZnWO microcrystals were explained by means of distortional effects and oxygen vacancies (V) in [AgO] (y = 2, 4, 6, and 7) and [WO] clusters, respectively, causing a red shift. Calculations revealed that the substitution for Ag with Zn occurred randomly in the α-AgWO lattice, and it was more favorable on the Ag4 site, where the local coordination of Ag cations was four.

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“…Al2xFe2-2xMo3O12, Al2xCr2-2xMo3O12 [29], Al2-xMexW3O12 (Me=Sc, In) [30], Y2-xCexW3O12 [31], Cn1-xZnxWO4 [32], among others [6] [18].…”

Section: A2-xbxm3o12: a Solid Solutions In A2m3o12 Familiymentioning

confidence: 99%

Evaluation of the Coefficients of Thermal Expansion and Phase Transitions in the Al2-Xinxw3o12 System

CORTES¹

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To my advisor, professor Bojan Marinkovic, for his infinite patience and time dedicated to this project, especially for your support, trust in me and constant motivation at times when I didn't even do it. Professor, I learned from you the value of excellence formation that every researcher and professional must have, I am infinitely grateful for your knowledge and teachings throughout this time.Receive from me all my admiration and respect for you.To Ceramic Materials research group, especially Anja Dosen, Juliana Viol and Fabian Orozco. Thank you for your time, patience, support and contributions.

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Structural investigation and scintillation properties of Cd_1−xZn_xWO₄solid solution single crystals

Abstract: Crystals of Cd1−xZnxWO4 (x < 0.5) were grown by the Czochralski technique. The structural evolution and scintillation properties of Cd1−xZnxWO4 samples were investigated.

Cited by 5 publications

References 27 publications

Modulation of Magnetic and Luminescence Properties via Control Cu-Doped in CdWO₄ Nanorods for Photocatalytic Applications

Modulation of Magnetic and Luminescence Properties via Control Cu-Doped in CdWO₄ Nanorods for Photocatalytic Applications

α-Ag_2–2xZn_xWO₄ (0 ≤ x ≤ 0.25) Solid Solutions: Structure, Morphology, and Optical Properties

Evaluation of the Coefficients of Thermal Expansion and Phase Transitions in the Al2-Xinxw3o12 System

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Structural investigation and scintillation properties of Cd1−xZnxWO4solid solution single crystals

Abstract: Crystals of Cd1−xZnxWO4 (x < 0.5) were grown by the Czochralski technique. The structural evolution and scintillation properties of Cd1−xZnxWO4 samples were investigated.

Cited by 5 publications

References 27 publications

Modulation of Magnetic and Luminescence Properties via Control Cu-Doped in CdWO4 Nanorods for Photocatalytic Applications

Modulation of Magnetic and Luminescence Properties via Control Cu-Doped in CdWO4 Nanorods for Photocatalytic Applications

α-Ag2–2xZnxWO4 (0 ≤ x ≤ 0.25) Solid Solutions: Structure, Morphology, and Optical Properties

Evaluation of the Coefficients of Thermal Expansion and Phase Transitions in the Al2-Xinxw3o12 System

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Structural investigation and scintillation properties of Cd_1−xZn_xWO₄solid solution single crystals

Modulation of Magnetic and Luminescence Properties via Control Cu-Doped in CdWO₄ Nanorods for Photocatalytic Applications

Modulation of Magnetic and Luminescence Properties via Control Cu-Doped in CdWO₄ Nanorods for Photocatalytic Applications

α-Ag_2–2xZn_xWO₄ (0 ≤ x ≤ 0.25) Solid Solutions: Structure, Morphology, and Optical Properties