Sustainable Dual-Template Fabrication of Hierarchical Pore Structure for Enhanced and Stable CO2 Capture

• DOI: 10.1021/acssuschemeng.3c08150
• Publication Date: 2024-02-06T05:47:34Z
• Authors: Hao Li; Jia Bin Niu; Kay Jin Tay; Mei Chee Tan; Hong Yee Low

Micropores significantly impact the adsorption properties of porous materials, but their effective utilization often encounters diffusion limitations. Introducing hierarchical pore structures offers a promising solution. However, sustainable fabrication remains challenging. Additionally, previous methods typically involve use nitrogen-containing compounds, complicating exploration relationship between structure and CO2 capture due to CO2's strong affinity for N-containing groups. Here, we report dual-template approach sustainably fabricate hierarchically carbon (HPC) systematically investigate effect hierarchy on capture. The resulting interconnected multiscale adsorbent exhibits superior than that other nitrogen-free adsorbents. with high hierarchy, encompassing extra-large, macro-, meso-, microscale features, shows 27% enhancement in capacity compared without extra-large mesopores. Moreover, this HPC retains its uptake kinetics after 20 adsorption–desorption cycles, showcasing robust stability. This study provides strategy optimizing micropore sites, offering valuable insights design advanced materials tailored adsorption-related applications.