RT Journal Article
T1 Effect of fabrication conditions on the porous structure of polyacrylonitrile-derived carbons and their influence on dye adsorption and gas separation
A1 Domínguez Ramos, Lidia
A1 Gómez Díaz, Diego
A1 Freire Leira, María Sonia
A1 Malucelli, Giulio
A1 Lazzari, Massimo
A1 González Álvarez, Julia
K1 Polyacrylonitrile
K1 Carbon
K1 Adsorption
K1 Carbon dioxide
K1 Dye
K1 Separation
AB The adsorption technique for pollutant separation has increased the number of applications, and one of the most interesting aspects is focused on the fabrication of new tailored materials. This research is focused on producing carbons as adsorbent materials from polyacrylonitrile (PAN), aiming to promote the presence of such heteroatoms as nitrogen and sulfur, already embedded in the precursor and added during fabrication, respectively. The use of various fabrication conditions (temperature, amount of activating agent, KOH and/or sulfur, S) has allowed the production of carbons with different pores distributions (microporous and mesoporous materials) and containing heteroatoms. In general, it was observed that both an increase in temperature and a higher amount of KOH or S tend to increase the size of the pores generated in the carbons. These materials have been used for CO2 separation and for the removal of industrial red dye, demonstrating the significant role of the carbon's porous structure in the adsorption process. On the one hand, for CO2 separation, the microporous materials showed outstanding behavior, achieving suitable loading and selectivity values. The red dye adsorption studies proved the existence of a size exclusion effect that hinders pollutant removal, as highly microporous carbons hardly could remove the contaminants. In contrast, this separation was enhanced by slightly increasing the average pore size (values above 2 nm)
PB Elsevier
YR 2025
FD 2025-08-30
LK https://hdl.handle.net/10347/43322
UL https://hdl.handle.net/10347/43322
LA eng
NO Lidia Domínguez-Ramos, Diego Gómez-Díaz, M. Sonia Freire, Giulio Malucelli, Massimo Lazzari, Julia González-Álvarez, Effect of fabrication conditions on the porous structure of polyacrylonitrile-derived carbons and their influence on dye adsorption and gas separation, Surfaces and Interfaces, Volume 73, 2025, 107571, ISSN 2468-0230, https://doi.org/10.1016/j.surfin.2025.107571
DS Minerva
RD 27 abr 2026