廃棄ガラスから派生した有孔シリカ:合成と構造的特徴づけ
Antônia Millena de Oliveira Lima1,2, Manuel Pedro Fernandes Graça3, Imen Hammami3
1Instituto Federal de Educação Ciência e Tecnologia do Maranhão, Campus Imperatriz, São Luís 65919-050, Brazil.
Materials (Basel, Switzerland)
|February 13, 2026
まとめ
廃棄ガラスは,半孔性シリカ材料を合成するための持続可能なシリカ源です. この研究は,前駆者としてその可能性を実証しているが,秩序ある構造にはさらなる最適化が必要である.
科学分野:
- 材料科学 材料科学とは
- グリーン・ケミストリー 緑の化学
- ナノテクノロジー ナノテクノロジー
背景:
- 従来のシリカの前駆物質の生産には,多くの場合エネルギーが密集しています.
- 廃棄ガラスは,豊富で持続可能なシリカの代替源です.
- 多孔性物質の環境に優しい合成経路の開発は極めて重要です.
研究 の 目的:
- 廃棄ガラスの再利用を持続可能なシリカの源として調査する.
- 廃棄ガラス由来のシリカゲルからメソポラスシリカ材料を合成する.
- 合成された材料の構造,形態,質感の性質を特徴付ける.
主な方法:
- 廃棄ガラス粉末のアルカリ溶解により,水酸化ナトリウムを用いてシリカゼルを生成する.
- シリカゲルを前駆体として使用して,多孔性のシリカガスの合成.
- X線微分法 (XRD),フーリエ変換赤外線光譜法 (FTIR),スキャニング電子顕微鏡法 (SEM),ゼータポテンシャル,窒素吸収分析を用いた特徴付け.
主要な成果:
- アモルフなシリカ構造はXRDによって確認された.
- FTIRスペクトルは,シリカネットワークの形成に成功したことを示した.
- SEMは球形粒子を示した (シリカゲルの場合は0.19 ± 0.02μm,メソポラスシリカの場合は0.15 ± 0.03μm).
- ゼータポテンシャル経由で良好なコロイド安定性が観察されました.
- 窒素吸収は,低シリカゼルの溶解性のために限られた特定の表面積を明らかにし,秩序あるメソ構造の形成を妨げました.
結論:
- 廃棄ガラスから派生したシリカゲルは,多孔性シリカ合成の有効な前駆体です.
- 現在の合成条件では,高度に秩序付けられたメソ構造が得られない.
- 材料合成の改善のために,先駆体溶解度とpHのさらなる制御が必要である.
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