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Tungstate

About: Tungstate is a research topic. Over the lifetime, 4035 publications have been published within this topic receiving 57701 citations.


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Journal ArticleDOI
TL;DR: Aqueous H2O2 is an ideal oxidant, when coupled with a tungstate complex and a quaternary ammonium hydrogensulfate as an acidic phase-transfer catalyst in an economically, technically, and environmentally satisfying manner.

849 citations

Journal ArticleDOI
TL;DR: In this paper, spontaneous Raman spectra of tungstate (MeWO4) and molybdate (MeMoO4), with sheelite structure were investigated (Me=Ca, Sr, Ba, Pb).

458 citations

Journal ArticleDOI
TL;DR: In this article, a large-scale synthesis of a family of single-crystalline transition metal tungstate nanorods/nanowires is easily realized by a hydrothermal crystallization technique under mild conditions using cheap and simple inorganic salts as precursors.
Abstract: The general large-scale synthesis of a family of single-crystalline transition metal tungstate nanorods/nanowires is easily realized by a hydrothermal crystallization technique under mild conditions using cheap and simple inorganic salts as precursors. Uniform tungstate nanorods/nanowires such as MWO4 (M = Zn, Mn, Fe), Bi2WO6, Ag2WO4, and Ag2W2O7 with diameters of 20–40 nm, lengths of up to micrometers, and controlled aspect ratios can be readily obtained by hydrothermal transformation and recrystallization of amorphous particulates. This novel and efficient pathway toward various kinds of related low-dimensional tungstate nanocrystals under mild conditions could open new opportunities for further investigating the novel properties of tungstate materials.

435 citations

Journal ArticleDOI
TL;DR: In this paper, the preparation of europium tungstate compound, Eu2(WO4)3, through the use of a polymeric precursor according to the Pechini method is presented.

331 citations

Journal ArticleDOI
TL;DR: In this paper, the preparation of 5 nm Ca0.968(Eu,Na)0.032WO4 at room temperature and subsequent hydrothermal treatment allow control over chemical compositions and particle size of CaWO 4-based red phosphors that has not yet been possible when using traditional preparation methods.
Abstract: Scheelite nanostructures Ca1−2x(Eu,Na)2xWO4 (0 < x ≤ 0.135) were prepared from 5 nm Ca0.968(Eu,Na)0.032WO4 by hydrothermal treatment. The preparation of 5 nm Ca0.968(Eu,Na)0.032WO4 at room temperature and subsequent hydrothermal treatment allow control over chemical compositions and particle size of CaWO4-based red phosphors that has not yet possible when using traditional preparation methods. By careful structural and electronic characterization, it is shown that simultaneous substitutions of Eu3+ and Na+ at Ca2+ sites were possible using this methodology, which allows one to vary the local symmetry surrounding Eu3+ and moreover the energy transfer from O2− to Eu3+ and tungstate groups to Eu3+ for optimum luminescence. As a consequence, the obtained CaWO4-based nanocrystals displayed excellent luminescence properties as demonstrated by luminescence lifetimes of milliseconds, abnormally narrowed emissions, and maximum quantum efficiencies of 92%. The results reported in this work show that it is possible ...

322 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023139
2022279
2021118
2020154
2019231
2018214