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High value activated carbons from waste polystyrene foams

AuthorsPaula, Fabiano G. F. de; Castro, Mateus C. M. de; Ortega, Paulo F. R.; Blanco Rodríguez, Clara ; Lavall, Rodrigo L.; Santamaría Ramírez, Ricardo
KeywordsPolystyrene foam
Activated carbon
Microporous carbon
Methylene blue
Issue Date26-Mar-2018
CitationMicroporous and Mesoporous Materials 267: 181-184 (2018)
AbstractActivated carbons (AC) with excellent textural properties have been obtained for the first time from waste polystyrene foam (PF), without any previous treatment, following a simple and conventional two-step procedure (formation of char followed by chemical activation). Even considering that the PF is not a graphitizable material, the best AC produced from this precursor has a very high BET surface area larger than 2700 m2 g−1 and a pore volume of 1.2 cm2 g−1, with a significant contribution of small mesopores. As a consequence, this AC reveals a surprising capacity to adsorption of relatively large molecules and a high specific capacitance when applied as a supercapacitor electrode. The maximum amount of adsorbed methylene blue obtained by batch equilibrium experiments are greater than 1 g g−1. In the context of the technical difficulties and low economic return of the reuse and recycling of waste PF, this work offers a strategic destination for this environmentally unfriendly residue.
Publisher version (URL)https://doi.org/10.1016/j.micromeso.2018.03.027
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