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説明:

Lanthanum oxides were selectively inserted into the micropores of SBA-15 via a simple impregnation and subsequent calcination method, forming mesoporous La–Si oxides (SBA-La). Characterization by using powder X-ray diffraction (XRD), N₂ adsorption, and transmission electron microscopy (TEM) confirmed that La oxides preferentially fill the micropores without damaging the mesopore structure. Upon excess loading, La oxides occupy mesopores while retaining cylindrical mesoporous morphology. SBA-La exhibits significantly enhanced stability against alkaline hydrothermal conditions compared with unmodified SBA-15. The improved durability is attributed to the formation of La oxides in micropores, which suppresses degradation pathways. This strategy provides a simple and effective route to improve the chemical robustness of mesoporous silica materials.

権利情報:

• In Copyright
  

  This is a pre-copyedited, author-produced version of an article accepted for publication in Chemistry Letters following peer review. The version of record Yoshimi Kawamoto, Jinrui Li, Yusuke Ide, Tsuneji Sano, Masahiro Sadakane, Selective insertion of La oxides into micropores of SBA-15 and preparation of highly ordered mesoporous La–Si oxides with high stability against alkaline hydrolysis, Chemistry Letters, Volume 54, Issue 9, September 2025, upaf156 is available online at: https://doi.org/10.1093/chemle/upaf156.

キーワード: Mesoporous La-Si oxide, High stability, SBA-15

刊行年月日: 2025-09-01

出版者: Oxford University Press (OUP)

掲載誌:

• Chemistry Letters (ISSN: 03667022) vol. 54 issue. 9 upaf156

研究助成金:

• SUZUKI
• JSPS KAKENHI JP22H05144
• JSPS Core-to-Core Program

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.6070

公開URL: https://doi.org/10.1093/chemle/upaf156

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更新時刻: 2026-04-30 12:01:11 +0900

MDRでの公開時刻: 2026-08-16 08:26:16 +0900