Preparation Methods and Performance Analysis of Polyanthra-Quinone/Carbon Nanotube Composites for Capturing Carbon Dioxide

Abstract

Carbon capture is one of the important methods to achieve carbon neutrality. In this paper, a simple and reliable method for the preparation of poly(anthraquinone)/multi-walled carbon nanotube composites (PAQ/MWCNTs) for capturing carbon dioxide is proposed. Using constant magnetic stirring, 1,4-anthraquinone (1,4-AQ) was allowed to accumulate on multi-walled carbon nanotube (MWCNTs) substrates via π–π. The poly(anthraquinone)/multi-walled carbon nanotube composites were produced by this continuous process. Besides, the carbon cloth electrode prepared from PAQ/MWCNTs composites was subjected to redox potentials for carbon dioxide capture. Results showed that PAQ/MWCNTs composites had good redox reversibility, their carbon dioxide capture capacity was 7.80 mmol·g−1 while the material utilization rate reaches reached 73.4%.

Keywords

• 1,4-anthraquinone
• multi-walled carbon nanotubes
• magnetic stirring
• poly(anthraquinone)/multi-walled carbon nanotube composites
• carboxylation
• carbon dioxide capture