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@article{WOS:001724390300001,
title = {3D interconnected pore networks enable superior volumetric CO2
uptake in amine-functionalized nanoporous carbon for direct air
capture},
author = {Zekai Ji and Sanjeevi Jayakumar and Carlos Maria Alava Limpo and Aravind Madhav and Maxim Trubyanov and Pengxiang Zhang and Daria Andreeva V and Jong Hak Lee and Barbaros Ozyilmaz},
doi = {10.1016/j.ccst.2026.100600},
times_cited = {0},
issn = {2772-6568},
year = {2026},
date = {2026-06-01},
journal = {CARBON CAPTURE SCIENCE & TECHNOLOGY},
volume = {19},
publisher = {ELSEVIER},
address = {RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS},
abstract = {Direct Air Capture (DAC) is a critical technology for mitigating
atmospheric CO2 concentrations, but current systems require substantial
space and high energy input, largely due to the low volumetric CO2
capture capacity of existing sorbents. A major limitation arises from
the intrinsic trade-off in conventional mesoporous platforms, where
increasing amine loading often compromises CO2 diffusion efficiency,
resulting in poor volumetric performance. In this report, we introduce a
solid-state sorbent platform that overcomes this limitation by
leveraging a fully interconnected three-dimensional (3D) pore network.
The sorbent, composed of polyethyleneimine (PEI)-functionalized
nanoporous amorphous carbon (NAC) millimeter-sized monoliths, features a
hierarchically organized pore architecture with high volumetric pore
density, enabling deep and uniform amine infiltration while maintaining
unobstructed CO2 diffusion pathways. This synergistic pore design yields
a remarkable volumetric CO2 uptake of similar to 1.6 mmol/cm & sup3;
under pre-hydrated conditions-over threefold higher than that of the
best-performing shaped sorbents reported to date. The NAC-PEI monoliths
further exhibit cyclic stability, mechanical robustness, and negligible
pressure drop, supporting their integration into compact and
energy-efficient continuous DAC modules. These findings establish pore
interconnectivity as a key design principle for next-generation solid
sorbents, enabling space-efficient, high-performance carbon removal
systems suitable for urban and distributed deployment.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}