Amine-Functionalized Covalent Organic Framework for Direct Air Capture of Carbon Dioxide
アミノ官能化共有結合性有機構造体による二酸化炭素の直接空気回収 (AI 翻訳)
Mohamed Essalhi, Rawan A. Al Qahtani, Aasif Helal, Mona S Otaibi, Ammar Alahmed, Zain H. Yamani, Islam M. A. Mekhemer, Mahmoud M. Abdelnaby
🤖 gxceed AI 要約
日本語
アミノ基を導入した共有結合性有機構造体（COF）が直接空気回収（DAC）向けに開発され、CO2吸着性能が向上した。機能化により表面積は減少するが、化学吸着サイトが導入され、CO2吸着量は1.80 mmol/g（298 K、100 kPa）を示し、選択性も向上。動的破過実験でも安定したサイクル性能が確認され、低圧CO2回収に有望な戦略を示す。
English
This study reports the postsynthetic functionalization of a covalent organic framework (COF) with amine groups for direct air capture (DAC) of CO2. The amine-appended COF (V-COF-tris) shows enhanced CO2 uptake (1.80 mmol/g at 298 K, 100 kPa) and high selectivity, despite reduced surface area. Dynamic breakthrough experiments confirm improved performance under simulated DAC conditions, demonstrating stable cyclic operation. The work provides a promising strategy for low-pressure carbon capture.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
本論文はDAC技術の材料開発に焦点を当てており、日本のカーボンニュートラル目標（2050年）に向けたCCUS技術の進展に寄与する。特に、高選択性・高容量のCOF系吸着材は、日本の排出削減・除去戦略において重要な選択肢となり得る。ただし、実用化にはスケールアップやコスト評価が課題。
In the global GX context
This paper advances direct air capture (DAC) technology using novel COF materials, relevant to global carbon removal strategies. The amine-functionalized COF demonstrates enhanced CO2 affinity and selectivity, which could support large-scale DAC deployment. The findings contribute to the growing portfolio of sorbent materials for negative emissions technologies.
👥 読者別の含意
🔬研究者:Materials scientists working on CO2 capture sorbents will find the amine-functionalization strategy and performance data valuable for designing next-generation DAC materials.
🏢実務担当者:Companies developing DAC systems could consider COFs as an alternative sorbent platform, but further engineering and cost analysis are needed.
📄 Abstract（原文）
Covalent organic frameworks (COFs) are promising materials for CO 2 capture due to their tunable porosity and chemical versatility. Herein, we report the postsynthetic functionalization of vinylene-linked V-COF-1 with tris(2-aminoethyl)amine (TAEA), yielding an amine-appended framework (V-COF-tris) with enhanced CO 2 affinity. Although amine incorporation reduces the surface area, it introduces abundant chemisorption sites that significantly improve CO 2 adsorption performance. V-COF-tris exhibits CO 2 uptakes of 1.80 and 2.68 mmol·g –1 at 100 kPa and 298 and 273 K, respectively, together with a high isosteric heat of adsorption ( Q st = 59 kJ·mol –1 ), indicating a stronger CO 2 affinity than the physisorption-dominated V-COF-1 ( Q st = 23 kJ·mol –1 ). The functionalized material also demonstrates markedly enhanced CO 2 selectivity, as confirmed by Ideal Adsorbed Solution Theory (IAST) calculations for CO 2 /N 2 mixtures under both dilute (400 ppm) and concentrated conditions. Dynamic breakthrough experiments further validate the improved performance of V-COF-tris under simulated direct air capture conditions, showing prolonged CO 2 retention and stable cyclic operation. Overall, this work demonstrates that postsynthetic amine functionalization effectively transforms COFs into chemisorption-driven sorbents with enhanced CO 2 affinity, providing a promising strategy for low-pressure carbon capture applications.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1021/acs.energyfuels.6c00750first seen 2026-07-26 05:19:16
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