Catalytic CO2 Capture via Ultrasonically Activating Dually Functionalized Carbon Nanotubes

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

2 Scopus Citations
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Author(s)

  • Yangyan Gao
  • Xin He
  • Keke Mao
  • Christopher K. Russell
  • Sam Toan
  • Aron Wang
  • TeYu Chien
  • Fangqin Cheng
  • Armistead G. Russell
  • Maohong Fan

Detail(s)

Original languageEnglish
Pages (from-to)8345–8354
Journal / PublicationACS Nano
Volume17
Issue number9
Online published19 Apr 2023
Publication statusPublished - 9 May 2023

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. © 2023 American Chemical Society.

Research Area(s)

  • carbon nanotubes, catalysts, CO2 capture, monoethanolamine, sorption and desorption

Citation Format(s)

Catalytic CO2 Capture via Ultrasonically Activating Dually Functionalized Carbon Nanotubes. / Gao, Yangyan; He, Xin; Mao, Keke et al.
In: ACS Nano, Vol. 17, No. 9, 09.05.2023, p. 8345–8354.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review