Detailed Record


Catalytic CO2 Capture via Ultrasonically Activating Dually Functionalized Carbon Nanotubes


Abstract High energy consumption and high cost have been the obstacles for large-scale deployment of all state-of-the-art CO2 capture technologies. Finding a transformational way to improve mass transfer and reaction kinetics of the CO2 capture process is timely for reducing carbon footprints. In this work, commercial single-walled carbon nanotubes (CNTs) were activated with nitric acid and urea under ultrasonication and hydrothermal methods, respectively, to prepare N-doped CNTs with the functional group of -COOH, which possesses both basic and acid functionalities. The chemically modified CNTs with a concentration of 300 ppm universally catalyze both CO2 sorption and desorption of the CO2 capture process. The increases in the desorption rate achieved with the chemically modified CNTs can reach as high as 503% compared to that of the sorbent without the catalyst. A chemical mechanism underlying the catalytic CO2 capture is proposed based on the experimental results and further confirmed by density functional theory computations.
Authors Yangyan Gao University of WyomingORCID , Xin He University of WyomingORCID , Keke Mao , Christopher K. Russell ORCID , Sam Toan ORCID , Aron Wang University of Wyoming , TeYu Chien University of WyomingORCID , Fangqin Cheng , Armistead G. Russell ORCID , Xiao Cheng Zeng ORCID , Maohong Fan University of WyomingORCID
Journal Info American Chemical Society | ACS Nano , vol: 17 , iss: 9 , pages: 8345 - 8354
Publication Date 4/19/2023
ISSN 1936-0851
TypeKeyword Image article
Open Access closed Closed Access
DOI https://doi.org/10.1021/acsnano.2c12762
KeywordsKeyword Image CO2 Capture (Score: 0.663929) , CO2 Capture Technology (Score: 0.654081) , Carbon Dioxide Capture (Score: 0.632748) , CO2 Separation (Score: 0.525595) , Porous Carbons (Score: 0.502346)