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

Yuichi Kawamoto; J. X. Li; Yusuke Ide; Tsuneji Sano; Masahiro Sadakane

doi:10.1093/chemle/upaf156

August 16, 2025Chemistry Letters

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

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Key Points

SBA-La exhibits enhanced stability against alkaline hydrolysis, providing a robust material for various applications.
Characterization confirmed selective filling of micropores by La oxides without altering the mesoporous structure.
The impregnation and calcination method leads to La oxides improving chemical robustness in mesoporous silica materials.
This study underscores the potential of mesoporous materials for industrial applications where stability is crucial.'],'simple_explanation':'Lanthanum oxides are added into tiny holes in a special material called SBA-15 to make it stronger. This stronger material, called SBA-La, can resist harsh conditions better than the original. The researchers used simple steps to improve how long this material lasts when exposed to harsh conditions. This means it could be used more safely in different applications where strength matters! 🧪'} assistant to=python codeimport json{
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Implication

Impregnation method improved stability against alkaline hydrolysis in mesoporous structures, indicating greater durability of SBA-La.

Abstract

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 XRD, N₂ adsorption, and 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 to 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.

Discussion

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Cite This Study

Kawamoto et al. (2025) studied this question.

synapsesocial.com/papers/68af570dad7bf08b1eaddf11 https://doi.org/10.1093/chemle/upaf156

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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

Key Points

Implication

Abstract

Discussion

Cite This Study

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

Key Points

Implication

Abstract

Discussion

Cite This Study

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