Spherical carbons: Synthesis, characterization and activation processes

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Title: Spherical carbons: Synthesis, characterization and activation processes
Authors: Romero Anaya, Aroldo José | Ouzzine, Mohammed | Lillo-Rodenas, Maria Angeles | Linares-Solano, Angel
Research Group/s: Materiales Carbonosos y Medio Ambiente
Center, Department or Service: Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales
Keywords: Spherical carbons | Synthesis | Characterization | Activation processes
Knowledge Area: Química Inorgánica
Issue Date: Mar-2014
Publisher: Elsevier
Citation: Carbon. 2014, 68: 296-307. doi:10.1016/j.carbon.2013.11.006
Abstract: Spherical carbons have been prepared through hydrothermal treatment of three carbohydrates (glucose, saccharose and cellulose). Preparation variables such as treatment time, treatment temperature and concentration of carbohydrate have been analyzed to obtain spherical carbons. These spherical carbons can be prepared with particle sizes larger than 10 μm, especially from saccharose, and have subsequently been activated using different activation processes (H3PO4, NaOH, KOH or physical activation with CO2) to develop their textural properties. All these spherical carbons maintained their spherical morphology after the activation process, except when KOH/carbon ratios higher than 4/1 were used, which caused partial destruction of the spheres. The spherical activated carbons develop interesting textural properties with the four activating agents employed, reaching surface areas up to 3100 m2/g. Comparison of spherical activated carbons obtained with the different activating agents, taking into account the yields obtained after the activation process, shows that phosphoric acid activation produces spherical activated carbons with higher developed surface areas. Also, the spherical activated carbons present different oxygen groups’ content depending on the activating agent employed (higher surface oxygen groups content for chemical activation than for physical activation).
Sponsor: The authors thank Generalitat Valenciana (GVPRE/2008/004, Prometeo/2009/047), FEDER and Office of the Vice President for Research, Development and Innovation of University of Alicante (UAUSTI10-08) for financial support.
URI: http://hdl.handle.net/10045/40172
ISSN: 0008-6223 (Print) | 1873-3891 (Online)
DOI: 10.1016/j.carbon.2013.11.006
Language: eng
Type: info:eu-repo/semantics/article
Peer Review: si
Publisher version: http://dx.doi.org/10.1016/j.carbon.2013.11.006
Appears in Collections:INV - MCMA - Artículos de Revistas

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