Nicotera Isabella, Enotiadis Apostolos, Simari Cataldo
Department of Chemistry and Chemical Technology, University of Calabria, Rende, 87036, Italy.
National Centre for Scientific Research "DEMOKRITOS", Ag. Paraskevi Attikis, Athens, 15310, Greece.
Small. 2024 Oct;20(42):e2401303. doi: 10.1002/smll.202401303. Epub 2024 Jun 10.
Nowadays, moisture-swing adsorption technology still relies on quaternary ammonium resins with limited CO capacity under ambient air conditions. In this work, a groundbreaking moisture-driven sorbent is developed starting from commercial graphene flakes and using glycidyltrimethylammonium chloride for incorporation of CO-sensitive quaternary ammonium functional groups. Boasting an outstanding CO capture performance under ultra-diluted conditions (namely, 3.24 mmol g at CO 400 ppm and 20% RH), the functionalized sorbent (fGO) features clear competitive advantages over current technologies for direct air capture. Notably, fGO demonstrated unprecedented moisture-swing capacity, ease of regenerability, versatility, selectivity, and longevity. These distinctive features position the fGO as an advanced and promising solution, showcasing its potential to outperform existing methods for moisture-swing direct air capture of CO.
如今，变湿吸附技术在环境空气条件下仍依赖于对CO容量有限的季铵树脂。在这项工作中，从商业石墨烯薄片出发，使用缩水甘油基三甲基氯化铵引入对CO敏感的季铵官能团，开发出了一种开创性的湿度驱动吸附剂。这种功能化吸附剂（fGO）在超稀释条件下（即在CO浓度为400 ppm和相对湿度为20%时，CO吸附量为3.24 mmol g）具有出色的CO捕获性能，与当前的直接空气捕获技术相比具有明显的竞争优势。值得注意的是，fGO展现出了前所未有的变湿容量、易于再生、多功能性、选择性和长效性。这些独特特性使fGO成为一种先进且有前景的解决方案，显示出其在变湿直接空气捕获CO方面超越现有方法的潜力。
