水からの溶存二酸化炭素および生成炭酸イオン捕捉のための金属有機構造体
Metal–Organic Frameworks for Capturing Dissolved Carbon Dioxide and Generated Carbonate Ions from Water (原題)
Subhajit Dutta, Jacopo Andreo, Nagore Barroso, Aleksander Ejsmont, Bettina Baumgartner, Agata Jankowska, J. Tittel, Zeynep Pinar Haslak, Hakan Demir, İlknur Eruçar, Rafael Marcé, Marcin Frankowski, Bert M. Weckhuysen, Evelyn Ploetz, Joanna Gościańska, Stefan Wuttke
🤖 gxceed AI 要約
日本語
本研究は、水中の溶存CO2と炭酸種を捕捉するMOF材料のpH依存性能を体系的に評価した。7種類の代表的なMOFを比較し、酸性条件では金属サイト、中間pHでは柔軟性、アルカリ条件では塩基性細孔が支配的な3つの吸着機構を特定した。JUK-8はpH 6.3で最大6.79 mmol/gの吸着能を示し、天然水サンプルでも有効性を確認した。
English
This study systematically evaluates pH-dependent performance of MOFs for capturing dissolved CO2 and carbonate species from water. Comparing seven archetypal MOFs, it identifies three adsorption regimes: metal-site dominated under acidic conditions, flexibility-assisted at intermediate pH, and basic-pore/ion-pairing under alkaline conditions. JUK-8 shows the highest capacity of 6.79 mmol/g at pH 6.3, with effectiveness in natural water samples.
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
日本のGX政策では、CCUS技術の開発が重要視されており、本研究成果は水由来のCO2除去という新たなアプローチを提供する。将来的には、産業排水や海洋からのCO2回収に応用される可能性があり、日本のカーボンニュートラル目標に貢献し得る。
In the global GX context
This research contributes to the global CCUS literature by addressing dissolved CO2 in water, a less-explored area compared to gas-phase capture. It provides fundamental insights into MOF design for aqueous CO2 removal, which could inform future direct ocean capture or wastewater treatment technologies, aligning with global decarbonization goals.
👥 読者別の含意
🔬研究者:Provides a pH-resolved benchmark for MOF design targeting aqueous CO2 species, useful for materials science and CCUS research.
🏢実務担当者:Potentially relevant for companies developing water treatment or direct ocean capture technologies, though early-stage.
🏛政策担当者:May inform R&D funding priorities for CCUS technologies, especially for water-based capture approaches.
📄 Abstract（原文）
Abstract Anthropogenic CO2 emissions are the major driver of climate change of this century. The natural hydrological cycles cause atmospheric CO2 to be absorbed by the natural water bodies, which necessitates urgent removal of dissolved CO2 and its generated carbonate species from water. Here, we present a pH-resolved benchmark that maps how switching from gas-phase CO2 to aqueous inorganic carbon (CO2(aq)/HCO3–/CO32–) changes the governing host–guest interactions in MOFs. By comparing seven archetypal MOFs spanning open metal sites, linker basicity, framework flexibility, and size-selective apertures, we identify three actionable adsorption regimes: (i) metal-site dominated uptake under acidic CO2(aq) conditions, (ii) flexibility-assisted uptake at intermediate pH, and (iii) basic-pore/ion-pairing dominated uptake under alkaline bicarbonate/carbonate conditions. Single-component adsorption studies revealed remarkably diverse CO2 removal performances, highlighting the key roles of the pH (e.g., 2, 6.3, 8.3, and 10) and the nature of the carbonic species present. Among all materials, JUK-8 exhibited the highest adsorption capacity of 6.79 mmol/g toward carbonic acid species at pH 6.3 (CO2 and HCO3¯). Importantly, the MOFs also exhibited substantial removal performance when tested in diverse natural water samples.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1021/acs.chemmater.6c01249first seen 2026-08-22 04:56:21
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