吸附
碳纤维
化学
化学工程
功能群
有机化学
吸附
材料科学
复合数
复合材料
工程类
聚合物
作者
Yuqing Meng,Manish Neupane,Drew M. Glenna,Asmita Jana,Wenhu Wang,Haiyan Zhao,Jin Qian,Yingchao Yang,Lu‐Cun Wang,Seth W. Snyder
标识
DOI:10.1021/acssuschemeng.5c00880
摘要
Developing efficient sorbent systems with a high CO2 adsorption capacity and ease of regeneration is crucial for carbon capture. This work presents a bioinspired approach using three-dimensional (3D) porous carbon derived from abundant Balsa wood. CO2 on these materials has been systematically investigated using kinetic characterization, in situ Fourier-transformed infrared (FTIR) spectroscopy, and theoretical calculations. The 3D carbon materials possess a high surface area and abundant hydroxyl (OH) groups, which act as basic sites to interact with acidic CO2, significantly enhancing the CO2 adsorption capacity. Specifically, KOH-treated Balsa carbon could achieve a CO2 adsorption capacity of 4.1 mmol g–1 at 600 mbar, outperforming other carbon-based adsorbents. In situ FTIR spectroscopy confirmed that CO2 adsorption is predominantly chemisorptive, forming carbonate and bicarbonate species. Efficient CO2 desorption under mild conditions (<85 °C) and negligible performance degradation over 11 cycles indicate good stability and reusability. Density functional theory calculations supported the experimental findings, showing favorable chemisorption with an adsorption energy of −0.64 eV for an OH-functionalized model carbon surface. This study highlights the importance of surface functionalization in enhancing the CO2 adsorption capacity and provides insights for designing advanced carbon-based sorbents. This work also demonstrates the potential of 3D porous carbon from Balsa wood as a high-performance CO2 sorbent, offering a sustainable and efficient solution for carbon capture and contributing to global efforts to reduce atmospheric CO2 and mitigate climate change.
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