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Li W, Li F, Zhang X, Wu J, Yang G. Metallic Re 3O 2 with mixed-valence states. Phys Chem Chem Phys 2024; 26:13300-13305. [PMID: 38639135 DOI: 10.1039/d4cp00973h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/20/2024]
Abstract
Rhenium (Re) shows the richest valence states from +2 to +7 in compounds, but its mixed-valence states are still missing thus far. In this work, we have explored the Re-O phase diagram with a wide range of stoichiometric compositions under high pressure through first-principles structural search calculations. Besides identifying two novel high-pressure phases of ReO2 and ReO3, we reveal two hitherto unknown Re-rich Re3O2 and O-rich ReO4 compounds. Re atoms in Re3O2 show mixed-valence states due to their inequivalent coordination environments, the first example in Re-based compounds. Electronic structure calculations demonstrate that the four discovered Re-O phases exhibit metallicity contributed by Re 5d electrons. Among them, ReO3 has a predicted critical temperature of up to 12 K at 50 GPa, derived from the interaction between Re 5d electrons and Re-derived low-frequency phonons. Our study points to new opportunities to disclose novel transition metal compounds with mixed-valence states.
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Affiliation(s)
- Wenjing Li
- Centre for Advanced Optoelectronic Functional Materials Research and Key Laboratory for UV Light-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun 130024, China.
| | - Fei Li
- State Key Laboratory of Metastable Materials Science & Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China.
| | - Xiaohua Zhang
- State Key Laboratory of Metastable Materials Science & Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China.
| | - Jinhui Wu
- Centre for Advanced Optoelectronic Functional Materials Research and Key Laboratory for UV Light-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun 130024, China.
| | - Guochun Yang
- Centre for Advanced Optoelectronic Functional Materials Research and Key Laboratory for UV Light-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun 130024, China.
- State Key Laboratory of Metastable Materials Science & Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China.
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Zhong Z, Fu H, Wang S, Duan Y, Wang Q, Yan CH, Du Y. A Universal Synthesis Strategy for Lanthanide Sulfide Nanocrystals with Efficient Photocatalytic Hydrogen Production. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2301392. [PMID: 37086136 DOI: 10.1002/smll.202301392] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 03/17/2023] [Indexed: 05/03/2023]
Abstract
As an important lanthanide (Ln)-based functional materials, the Ln chalcogenides possess unique properties and various applications. However, the controllable synthesis of Ln chalcogenide nanocrystals still faces great challenges because of the rather poor affinity between Ln and chalcogenide ions (S, Se, Te) as well as strong preference of combination with existed oxygen. Herein, a facile but general heterogeneous nucleation synthetic strategy is established toward a series of colloidal ternary Cu Ln sulfides nanocrystals using the Ln dithiocarbamates and CuI as precursors. To extend this synthetic protocol, similar strategy is used to prepare six kinds of high quality CuLnS2 nanocrystals, while the bulk ones are only obtained by the traditional solid-state reaction at rigorous condition. Importantly, high-entropy nanocrystals CuLnS2 and CuEux Ln2-x S3 which contain six Ln elements (Nd, Sm, Gd, Tb, Dy) are readily obtained by the co-decomposed process attributed to their similar diffusion speed. As a proof-of-concept application, CuEu2 S3 nanocrystals showed efficient photocatalytic hydrogen production properties.
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Affiliation(s)
- Ziyun Zhong
- Tianjin Key Lab for Rare Earth Materials and Applications, Center for Rare Earth and Inorganic Functional Materials, Smart Sensing Interdisciplinary Science Center, Haihe Laboratory of Sustainable Chemical Transformations, School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, Tianjin, 300350, P. R. China
- College of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry, Ministry of Education, Nankai University, Tianjin, 300071, P. R. China
| | - Hao Fu
- Tianjin Key Lab for Rare Earth Materials and Applications, Center for Rare Earth and Inorganic Functional Materials, Smart Sensing Interdisciplinary Science Center, Haihe Laboratory of Sustainable Chemical Transformations, School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, Tianjin, 300350, P. R. China
| | - Siyuan Wang
- Tianjin Key Lab for Rare Earth Materials and Applications, Center for Rare Earth and Inorganic Functional Materials, Smart Sensing Interdisciplinary Science Center, Haihe Laboratory of Sustainable Chemical Transformations, School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, Tianjin, 300350, P. R. China
| | - Yingnan Duan
- Tianjin Key Lab for Rare Earth Materials and Applications, Center for Rare Earth and Inorganic Functional Materials, Smart Sensing Interdisciplinary Science Center, Haihe Laboratory of Sustainable Chemical Transformations, School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, Tianjin, 300350, P. R. China
| | - Qinglun Wang
- College of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry, Ministry of Education, Nankai University, Tianjin, 300071, P. R. China
| | - Chun-Hua Yan
- Tianjin Key Lab for Rare Earth Materials and Applications, Center for Rare Earth and Inorganic Functional Materials, Smart Sensing Interdisciplinary Science Center, Haihe Laboratory of Sustainable Chemical Transformations, School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, Tianjin, 300350, P. R. China
- College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Yaping Du
- Tianjin Key Lab for Rare Earth Materials and Applications, Center for Rare Earth and Inorganic Functional Materials, Smart Sensing Interdisciplinary Science Center, Haihe Laboratory of Sustainable Chemical Transformations, School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, Tianjin, 300350, P. R. China
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Jin M, Zeng Z, Fu H, Wang S, Yin Z, Zhai X, Zhang Q, Du Y. Strain-Negligible Eu 2+ Doping Enabled Color-Tunable Harsh Condition-Resistant Perovskite Nanocrystals for Superior Light-Emitting Diodes. JACS AU 2023; 3:216-226. [PMID: 36711089 PMCID: PMC9875234 DOI: 10.1021/jacsau.2c00593] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 11/21/2022] [Accepted: 11/23/2022] [Indexed: 06/18/2023]
Abstract
Cesium lead halide (CsPbX3, X = Br, Cl, I) perovskite nanocrystals (NCs) possess tunable band gaps across the entire visible spectral range and are promising for various optoelectronic device applications. However, poor performance in adverse conditions limits their further development in practical optoelectronics. Herein, highly stable perovskite NCs are developed by doping europium(II) (Eu2+) into the B-site of CsPbBr3 with negligible lattice distortion/strain. Eu2+-doped CsPbBr3 NCs exhibit tunable green-to-cyan emissions, high photoluminescence quantum yield, and good resistance to harsh conditions, including ultraviolet irradiation, erosion of moisture, and corrosion of polar solvent molecules. In particular, the thermal stability of CsPbBr3 NCs after Eu2+ doping is greatly enhanced under continuous heating in air, while exhibiting the emissions of Eu2+. Furthermore, a Eu2+-doped CsPbBr3 NC-based cyan light-emitting diode is fabricated, which exhibits narrow exciton emission driven under different current densities. This work would open the avenue to develop the rational lanthanide ion doping strategy for further advancing perovskite nanomaterials toward practical applications.
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Affiliation(s)
- Mengdie Jin
- Tianjin
Key Lab for Rare Earth Materials and Applications, Center for Rare
Earth and Inorganic Functional Materials, Smart Sensing Interdisciplinary
Science Center, School of Materials Science and Engineering &
National Institute for Advanced Materials, Nankai University, Tianjin 300350, P.R. China
| | - Zhichao Zeng
- Tianjin
Key Lab for Rare Earth Materials and Applications, Center for Rare
Earth and Inorganic Functional Materials, Smart Sensing Interdisciplinary
Science Center, School of Materials Science and Engineering &
National Institute for Advanced Materials, Nankai University, Tianjin 300350, P.R. China
| | - Hao Fu
- College
of Chemistry, Nankai University, Tianjin 300071, P.R. China
| | - Siyuan Wang
- Tianjin
Key Lab for Rare Earth Materials and Applications, Center for Rare
Earth and Inorganic Functional Materials, Smart Sensing Interdisciplinary
Science Center, School of Materials Science and Engineering &
National Institute for Advanced Materials, Nankai University, Tianjin 300350, P.R. China
| | - Zongyou Yin
- Research
School of Chemistry, Australian National
University, Canberra ACT 2601, Australia
| | - Xinyun Zhai
- Tianjin
Key Lab for Rare Earth Materials and Applications, Center for Rare
Earth and Inorganic Functional Materials, Smart Sensing Interdisciplinary
Science Center, School of Materials Science and Engineering &
National Institute for Advanced Materials, Nankai University, Tianjin 300350, P.R. China
| | - Qian Zhang
- State
Key Laboratory of Eco-Hydraulics in Northwest Arid Region, Department
of Applied Chemistry, Xi’an University
of Technology, Xi’an 710048, P.R. China
| | - Yaping Du
- Tianjin
Key Lab for Rare Earth Materials and Applications, Center for Rare
Earth and Inorganic Functional Materials, Smart Sensing Interdisciplinary
Science Center, School of Materials Science and Engineering &
National Institute for Advanced Materials, Nankai University, Tianjin 300350, P.R. China
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Li L, Chen Y, He J, Zhou A. The Influence of Yb Doping and Sintering Conditions on the Magnetocaloric and Mechanical Properties of EuS. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27175660. [PMID: 36080427 PMCID: PMC9457925 DOI: 10.3390/molecules27175660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Revised: 08/28/2022] [Accepted: 08/29/2022] [Indexed: 11/16/2022]
Abstract
For this work, europium monosulfide (EuS) powders were prepared by sulfurizing Eu2O3 powder with CS2 gas. The synthesized EuS powders were sintered by SPS at temperatures in the 800-1600 °C range for 0.33-1 h at 50 MPa under vacuum conditions. The influences of Yb doping and sintering conditions on the magnetocaloric and mechanical properties of EuS were investigated systematically. An increase in sintering temperature caused the rise of lattice parameters of EuS, whereas Yb doping caused them to drop. SEM showed that the grain size of the EuS increased with sintering temperatures in the 1000-1400 °C range. Higher sintering temperatures can enlarge the magnetizability and saturation magnetization of EuS compact. On the contrary, Yb doping can weaken the magnetizability and saturation magnetization of EuS compact. All sintered polycrystalline EuS compacts had weaker thermomagnetic irreversibility and lower magnetic anisotropy.
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Affiliation(s)
- Liang Li
- School of Mechanical and Electrical Engineering, Nanyang Normal University, Nanyang 473061, China
- Jinguan Electric Co., Ltd., Nanyang 473000, China
- Henan Key Laboratory of Materials on Deep-Earth Engineering, School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China
- Correspondence: (L.L.); (A.Z.); Tel.: +86-0377-6351-3077 (L.L.)
| | - Yuqi Chen
- School of Materials Science and Engineering, Shanghai Dian Ji University, Shanghai 201306, China
| | - Junbao He
- School of Mechanical and Electrical Engineering, Nanyang Normal University, Nanyang 473061, China
| | - Aiguo Zhou
- Henan Key Laboratory of Materials on Deep-Earth Engineering, School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China
- Correspondence: (L.L.); (A.Z.); Tel.: +86-0377-6351-3077 (L.L.)
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Mishra S. Ultra-mild synthesis of nanometric metal chalcogenides using organyl chalcogenide precursors. Chem Commun (Camb) 2022; 58:10136-10153. [PMID: 36004549 DOI: 10.1039/d2cc03458a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bis(trialkylsilyl) monochalcogenides and diorganyl dichalcogenides, (R3Si)2E and R2E2 (E = S, Se or Te and R = alkyl, aryl or allyl group), have emerged in the past decade as excellent reagents for the synthesis of metal chalcogenide nanoparticles (NPs) and clusters owing to their ability to transfer the chalcogenide anion (E2-) under ultra-mild conditions and versatility in reacting even with non-conventional metal reagents or being employed in a variety of synthetic methods. In comparison, the related non-silylated diorganyl monochalcogenides R2E have received attention only recently for the solution phase synthesis of metal chalcogenide NPs. In spite of sharing many similarities, these three families of organyl chalcogenides are different in their coordination ability and decomposition behavior, and therefore in reactivities towards metal reagents. This feature article provides a concise overview on the use of these three families as synthons for the ultralow-temperature synthesis of metal chalcogenide nanomaterials, deliberating their different decomposition mechanisms and critically assessing their advantages for certain applications. More specifically, it discusses their usefulness in (i) affording molecular precursors with different kinetic and thermal stabilities, (ii) isolating reactive intermediates for comprehending the mechanism of molecule-to-nanoparticle transformation and, therefore, achieving fine control over the synthesis, (iii) stabilizing isolable metastable or difficult-to-achieve phases, and (iv) yielding complex ternary nanoparticles with controlled stoichiometry or composites with sensitive materials without modifying the characteristics of the latter. Besides providing a perspective on the low-temperature synthesis of nanomaterials, this overview is expected to assist further progress, particularly in the field of R2E, leading to interesting materials including metastable ones for new applications.
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Affiliation(s)
- Shashank Mishra
- Université Claude Bernard Lyon 1, CNRS, UMR 5256, Institut de Recherches sur la Catalyse et l'Environnement de Lyon (IRCELYON), 2 Avenue Albert Einstein, 69626 Villeurbanne, France.
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