Enhanced Ultramicropore of Biomass-Derived Porous Carbon for Efficient and Low-Energy CO2 Capture: Integration of Adsorption and Solar Desorption
Pengcheng Guo , Ruiqi Xue , Qiao Zou , Xiancheng Ma , Changqing Su , Zheng Zeng , Liqing Li
Energy & Environmental Materials ›› 2026, Vol. 9 ›› Issue (2) : e70140
Biomass-derived carbon for CO2 capture is significant for reducing carbon emissions and recovering C1 resources, contributing to zero-carbon goals. However, developing biomass-based porous carbon with high CO2 capture while reducing regeneration energy consumption remains challenging. This study leverages the tunable pore structure and photothermal properties of biomass-based carbon, integrating adsorption and solar-driven desorption for efficient, low-energy CO2 capture. Specifically, mechanical compaction increased the ultramicropore volume of the porous carbon by 25%, leading to a corresponding 25% enhancement in CO2 adsorption capacity. Theoretical calculations and correlation analyses further elucidated that ultramicropore volume, nitrogen doping, and oxygen doping play significant roles in CO2 adsorption. Under one-sun illumination, the surface temperature of the prepared porous carbon rapidly rose to 57.1 °C within 6 min and stabilized around 71.0 °C, resulting in a regeneration efficiency of 75%. These findings provide valuable theoretical and practical insights for the development of high-efficiency, low-energy CO2 capture technologies.
CO2 capture / porous carbon / solar desorption / ultramicroporous structure
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2025 The Author(s). Energy & Environmental Materials published by John Wiley & Sons Australia, Ltd on behalf of Zhengzhou University.
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