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説明:

A series of RE(OH)SO4 layered compounds (RE = La-Tb lanthanides) were successfully synthesized via hydrothermal reaction under near-neutral solution pH and the mild temperature of 180 °C for 24 h, and the temperature/pH/time courses of phase/morphology evolution were clarified with RE = Tb for example. The compounds were characterized in detail for crystallite morphology, crystal structure, thermal behavior and vibrational property, and the intrinsic influence of lanthanide contraction was unveiled. Tb(OH)SO4 was analyzed to be isostructural with its La-Gd analogues (CN = 9 for Tb), instead of the reportedly Dy-Yb ones (CN = 8), and have parameters of a = 4.3806 Å, b = 12.1729 Å, c = 6.7674 Å and  = 106.3967° for its monoclinic unit cell (P21/n space group). The Eu and Tb compounds exhibited red (λex = 395 nm, λem = 616 nm) and green (λex = 369 nm, λem = 545 nm) emissions, and have fluorescence lifetimes of ~0.84 and 1.07 ms and chromaticity coordinates of around (0.632, 0.365) and (0.295, 0.481), respectively.

権利情報:

• Creative Commons BY-NC-ND Attribution-NonCommercial-NoDerivs 4.0 International
  

キーワード: RE(OH)SO4 , Crystal structure, Hydrothermal crystallization, Phase/morphology evolution

刊行年月日: 2023-12-12

出版者: Elsevier

掲載誌:

• Ceramics International (ISSN: 18733956) vol. 50 issue. 5 p. 7673-7681

研究助成金:

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4399

公開URL: https://doi.org/10.1016/j.ceramint.2023.12.091

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更新時刻: 2025-12-12 08:30:42 +0900

MDRでの公開時刻: 2025-12-12 08:24:13 +0900