高効率の可視光駆動 H2O2 光合成のためのピペラジン関連メタルフタロシアニンフレームワーク
Qianjun Zhi1, Wenping Liu1, Rong Jiang1
1Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China.
Journal of the American Chemical Society
|November 9, 2022
まとめ
酸素から過酸化水素 (H2O2) の人工光合成のために高度に活性な共性有機フレームワーク (COF) が合成された. これらの新しいピペラジン結合のCOPcベースのCOFは,効率的な可視光駆動H2O2生成を示しています.
科学分野:
- 材料科学
- 光触媒
- 緑の化学
背景:
- H2O2の人工光合成は エネルギー効率の良い 環境に優しい代替手段です
- 高活性で選択的な2e-酸素還元反応 (ORR) 光触媒の開発は,効率的なH2O2生成に不可欠です.
- 現在の光触媒はしばしば不満足な生産性に苦しんでいます.
研究 の 目的:
- 新しい二次元ピペラジン結合コバルトフタロシアニン (CoPc) 基の共性有機フレームワーク (COF) を合成する.
- 可視光の下での O2 還元による H2O2 生成のための光触媒としての効率を調査する.
- 人工光合成におけるCOFベースの光触媒の新たな基準を確立する.
主な方法:
- 核愛置換反応によるCoPc-BTM-COFとCoPc-DAB-COFの合成
- 粉末X線 difraktion,電子顕微鏡,および光譜を用いた特徴付け.
- 可視光下 (λ > 400 nm) で O2 を H2O2 に変換する光触媒活性評価
主要な成果:
- 合成されたCOFは,完全に結合した構造と遮断されたπ-スタッキングを持つ結晶の多孔構造を持っています.
- 広範囲の光吸収 (400-1000 nm) と,光誘導による電荷分離/輸送効率が向上しています.
- CoPc-BTM-COFは2096μmol h-1 g-1の記録的なH2O2収量と630nmで7.2%の明らかな量子収量を達成しました.
結論:
- パイペラジンに結合したCOPcベースのCOFは,可視光によるH2O2生成のための非常に効果的な光触媒です.
- これらの材料は,既存のCOFベースの光触媒に比べて優れた性能を示しています.
- この発見は,持続可能なH2O2合成のための高性能で低コストの光触媒の開発への道を開く.
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