二重機能の金属有機枠におけるアンモニアの特殊な密度
Christopher Marsh1, Xue Han1, Jiangnan Li1
1Department of Chemistry, University of Manchester, Manchester, M13 9PL, U.K.
Journal of the American Chemical Society
|April 22, 2021
まとめ
新しいアルミニウム基の金属有機構造体であるMFM-303 (Al) は,例外的なアンモニア (NH3) 吸収能力と密度を示しています. この材料は様々な条件下で効率的なアンモニアの捕獲に有望です.
科学分野:
- 材料科学
- 化学について
- 化学工学
背景:
- アンモニア (NH3) は重要な化学原料であり,潜在的に炭素のないエネルギー媒介です.
- 効率的で可逆的なアンモニアの回収と貯蔵は依然として大きな課題です.
- メタル・オーガニック・フレームワーク (MOF) は,ガス吸附アプリケーションのための調整可能な構造を提供します.
研究 の 目的:
- 機能化されたAlベースのMOF,MFM-303 ((Al) のアンモニア吸収特性を調査する.
- 特定の機能群がアンモニアの吸収と密度を高める役割を理解する.
- 関連条件下でアンモニアを捕獲する材料の性能を評価する.
主な方法:
- MFM-303 ((Al) の合成と特徴づけ
- 293Kのアンモニア吸附同熱度測定
- シンクロトロンX線偏光と非弾性ニュートロン散乱.
- アンモニアの捕獲の評価のための画期的な実験.
主要な成果:
- MFM-303 ((Al) は,9. 9 mmol g-1までの可逆性アンモニア吸収を示しています.
- 固体アンモニアに匹敵する,293 K (0.801 g cm-3) で達成された例外的なアンモニアの密度.
- 自由なカルボキシル酸とヒドロキシル群は,アンモニア分子を固定するのに不可欠です.
- 乾燥状態と湿気状態の両方で,低濃度でも優れたアンモニアの捕獲性能.
結論:
- MFM-303 ((Al) は,アンモニアの捕獲と貯蔵のための非常に有望な材料です.
- 機能化された孔環境は,アンモニアの吸収能力と密度を大幅に高めます.
- この材料は,実用的なアンモニア分離アプリケーションで堅固な性能を示しています.
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