Enhanced post-combustion CO_(2) capture and direct air capture by plasma surface functionalization of graphene adsorbent  

作　　者：Rahul Navik Eryu Wang Xiao Ding Huang Yunyi Yiyu Liu Jia Li 

机构地区：[1]Guangdong-Hong Kong Joint Laboratory for Carbon Neutrality,Jiangmen Laboratory of Carbon and Science and Technology,Jiangmen 529100,Guangdong,China [2]Guangzhou HKUST Fok Ying Tung Research Institute,Guangzhou 511458,Guangdong,China [3]The Hong Kong University of Science and Technology(Guangzhou),Guangzhou 511453,Guangdong,China [4]Stoddart Institute of Molecular Science,Department of Chemistry,Zhejiang University,Hangzhou 310058,Zhejiang,China [5]Carbon Neutrality and Climate Change Thrust,Society Hub,The Hong Kong University of Science and Technology(Guangzhou),Guangzhou 511453,Guangdong,China

出　　处：《Journal of Energy Chemistry》2025年第1期653-664,共12页能源化学(英文版)

基　　金：Guangzhou (China) government postdoctoral program for providing financial support to conduct this work;support from the National Natural Science Foundation of China (No. 72140008);funding from the European Union’s Horizon 2020 Research and Innovation program under grant agreement No. 101022484。

摘　　要：Graphene has enormous potential to capture CO_(2)due to its unique properties and cost-effectiveness.However,graphene-based adsorbents have drawbacks of lower CO_(2)adsorption capacity and poor selectivity.This work demonstrates a one-step rapid and sustainable N_(2)/H_(2)plasma treatment process to prepare graphene-based sorbent material with enhanced CO_(2)adsorption performance.Plasma treatment directly enriches amine species,increases surface area,and improves textural properties.The CO_(2)adsorption capacity increases from 1.6 to 3.3 mmol/g for capturing flue gas,and from 0.14 to 1.3 mmol/g for direct air capture (DAC).Importantly,the electrothermal property of the plasma-modified aerogels has been significantly improved,resulting in faster heating rates and significantly reducing energy consumption compared to conventional external heating for regeneration of sorbents.Modified aerogels display improved selectivity of 42 and 87 after plasma modification for 5 and 10 min,respectively.The plasma-treated aerogels display minimal loss between 17%and 19% in capacity after 40 adsorption/desorption cycles,rendering excellent stability.The N_(2)/H_(2)plasma treatment of adsorbent materials would lower energy expenses and prevent negative effects on the global economy caused by climate change.

关 键 词：Carbon neutrality CO_(2)capture Climate change Plasma treatment Graphene aerogel 

分 类 号：O647.3[理学—物理化学] X701[理学—化学]