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Xu Z, Du P, Zhu Q, Li X, Sun X, Li JG. KLn(MoO 4) 2 micro/nanocrystals (Ln = La-Lu, Y): systematic hydrothermal crystallization, structure, and the performance of doped Eu 3+ for optical thermometry. Dalton Trans 2021; 50:17703-17715. [PMID: 34812467 DOI: 10.1039/d1dt03642d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Systematic crystallization of KLn(MoO4)2 double molybdate micro/nanocrystals was achieved in this work for the family of lanthanide elements (excluding Pm) and Y via hydrothermal reaction under the optimized conditions of pH = 7, Mo/Ln molar ratio R = 5 and 200 °C, with which the intrinsic influence of lanthanide contraction on phase preference, crystallite morphology (size/shape) and crystal structure was clearly revealed. Extended synthesis also produced KLa1-xEux(MoO4)2 (KLM:xEu) and KY1-yEuy(MoO4)2 (KYM:yEu) red phosphors, and detailed spectral analysis found that the layered structure of orthorhombic KYM allows Eu3+ to have a high quenching content of ∼70 at% (y = 0.7) and higher quantum efficiency and thermal stability of luminescence. Application also indicated that the KYM:0.7Eu optimal phosphor has the potential for optical temperature sensing with the thermally coupled 5D0 and 5D1 energy levels of Eu3+.
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Affiliation(s)
- Zhixin Xu
- Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Materials Science and Engineering, Northeastern University, Shenyang, Liaoning 110819, China.,Research Center for Functional Materials, National Institute for Materials Science, Namiki 1-1, Tsukuba, Ibaraki 305-0044, Japan.
| | - Panpan Du
- Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Materials Science and Engineering, Northeastern University, Shenyang, Liaoning 110819, China.,Research Center for Functional Materials, National Institute for Materials Science, Namiki 1-1, Tsukuba, Ibaraki 305-0044, Japan.
| | - Qi Zhu
- Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Materials Science and Engineering, Northeastern University, Shenyang, Liaoning 110819, China
| | - Xiaodong Li
- Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Materials Science and Engineering, Northeastern University, Shenyang, Liaoning 110819, China
| | - Xudong Sun
- Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Materials Science and Engineering, Northeastern University, Shenyang, Liaoning 110819, China.,Foshan Graduate School of Northeastern University, Foshan, Guangdong 528311, China
| | - Ji-Guang Li
- Research Center for Functional Materials, National Institute for Materials Science, Namiki 1-1, Tsukuba, Ibaraki 305-0044, Japan.
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Núñez NO, Gómez-González E, Calderón-Olvera RM, Becerro AI, Colón G, Ocaña M. NaY(MoO 4) 2-based nanoparticles: synthesis, luminescence and photocatalytic properties. Dalton Trans 2021; 50:16539-16547. [PMID: 34749391 DOI: 10.1039/d1dt02365a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
We report on a novel synthesis method, which produces NaY(MoO4)2 nanoparticles having an almost spherical shape and hydrophilic character. The procedure is also suitable for the preparation of NaY(MoO4)2-based nanophosphors by doping this host with lanthanide cations (Eu3+, Tb3+ and Dy3+), which, under UV illumination, exhibit intense luminescence whose color is determined by the selected doping cation (red for Eu3+, green for Tb3+ and yellow for Dy3+). The effects of the cations doping level on the luminescent properties are analyzed in terms of emission intensities and luminescent lifetime, to find the optimum phosphors. Finally, the performance of these nanophosphors and that of the undoped system for the photocatalytic degradation of rhodamine B, used as a model compound, is also analyzed.
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Affiliation(s)
- Nuria O Núñez
- Instituto de Ciencia de Materiales de Sevilla (CSIC-US), c/Américo Vespucio, 49, 41092 Seville, Spain.
| | - Elisabet Gómez-González
- Instituto de Ciencia de Materiales de Sevilla (CSIC-US), c/Américo Vespucio, 49, 41092 Seville, Spain.
| | - Roxana M Calderón-Olvera
- Instituto de Ciencia de Materiales de Sevilla (CSIC-US), c/Américo Vespucio, 49, 41092 Seville, Spain.
| | - Ana I Becerro
- Instituto de Ciencia de Materiales de Sevilla (CSIC-US), c/Américo Vespucio, 49, 41092 Seville, Spain.
| | - Gerardo Colón
- Instituto de Ciencia de Materiales de Sevilla (CSIC-US), c/Américo Vespucio, 49, 41092 Seville, Spain.
| | - Manuel Ocaña
- Instituto de Ciencia de Materiales de Sevilla (CSIC-US), c/Américo Vespucio, 49, 41092 Seville, Spain.
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Maitra S, Halder S, Maitra T, Roy S. Superior light absorbing CdS/vanadium sulphide nanowalls@TiO 2 nanorod ternary heterojunction photoanodes for solar water splitting. NEW J CHEM 2021. [DOI: 10.1039/d0nj06082h] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Vanadium sulphide is an emerging infrared active photocatalyst that has not been utilized to its maximum potential.
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Affiliation(s)
- Soumyajit Maitra
- Department of Chemical Engineering
- University of Calcutta
- Kolkata
- India
| | - Somoprova Halder
- Department of Chemical Engineering
- University of Calcutta
- Kolkata
- India
| | - Toulik Maitra
- Department of Chemical Engineering
- University of Calcutta
- Kolkata
- India
| | - Subhasis Roy
- Department of Chemical Engineering
- University of Calcutta
- Kolkata
- India
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Tiwari A, Dhoble S. Tunable lanthanide/transition metal ion‐doped novel phosphors for possible application in w‐LEDs: a review. LUMINESCENCE 2019; 35:4-33. [PMID: 31647168 DOI: 10.1002/bio.3712] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2019] [Revised: 08/10/2019] [Accepted: 08/28/2019] [Indexed: 12/21/2022]
Affiliation(s)
- Ashish Tiwari
- Department of ChemistryDr. Bhimrao Ambedkar Government College Pamgarh India
| | - S.J. Dhoble
- Department of PhysicsR.T.M. Nagpur University Nagpur India
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