High CO2 adsorption by amino-modified bio-spherical cellulose nanofibres aerogels
- 2 Downloads
Climate change has become increasingly serious due to the greenhouse effect. It is therefore necessary to control the content of greenhouse gases such as carbon dioxide in the atmosphere, using, for instance, CO2-adsorbing materials. Here, we synthesized ultra-lightweight and spherical cellulose nanofibres aerogels by a suspension titration method using an efficient amination process. These functional materials with high porosity, higher than 96.54%, and three-dimensional network structure, were prepared by freeze-drying spherical cellulose nanofibres hydrogel. Their maximum CO2 adsorption capacity reaches 1.78 mmol/g, and they show excellent regeneration, of more than 10 cycles. This synthesis of bioaerogels represents a new method for the preparation of bio-CO2 adsorbents.
KeywordsCellulose nanofibres Cellulose nanofibres aerogels Amine modification Carbon dioxide (CO2) adsorbents
This work was financially supported by the Special Fund for Forest Scientific Research in the Public Welfare (201504603), the Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions, and the Doctorate Fellowship Foundation of Nanjing Forestry University of China (163020772).
- Aulin C, Varga I, Claesson PM, Wågberg L, Lindström T (2008) Buildup of polyelectrolyte multilayers of polyethyleneimine and microfibrillated cellulose studied by in situ dual-polarization interferometry and quartz crystal microbalance with dissipation. Langmuir ACS J Surf Colloids 24:2509–2518. https://doi.org/10.1021/la7032884 CrossRefGoogle Scholar
- Knöfel C, Martin C, Hornebecq V, Llewellyn PL (2009) Study of carbon dioxide adsorption on mesoporous aminopropylsilane-functionalized silica and titania combining microcalorimetry and in situ infrared spectroscopy. J Phys Chem C 113:21726–21734. https://doi.org/10.1021/jp907054h CrossRefGoogle Scholar
- Rochelle GT (2009) Amine scrubbing for CO2 capture. Science 325:1652–1654. http://www.jstor.org/stable/40301873
- Vilarrasa-Garcia E, Moya EMO, Cecilia JA Jr, Cavalcante CL, Jiménez-Jiménez J, Azevedo DCS, Rodríguez-Castellón E (2015) CO2 adsorption on amine modified mesoporous silicas: effect of the progressive disorder of the honeycomb arrangement. Microporous Mesoporous Mater 209:172–183. https://doi.org/10.1016/j.micromeso.2014.08.032 CrossRefGoogle Scholar
- Xu X, Song C, Andrésen JM, Miller BG, Scaroni AW (2003) Preparation and characterization of novel CO2 “molecular basket” adsorbents based on polymer-modified mesoporous molecular sieve MCM-41. Microporous Mesoporous Mater 62:29–45. https://doi.org/10.1016/S1387-1811(03)00388-3 CrossRefGoogle Scholar