23 research outputs found
Development of easy made low cost bindless monolithic electrodes from biomass with controlled properties to be used as electrochemical capacitors
Surface and porous characterisation of activated carbons made from a novelbiomass precursor, the esparto grass
In the work now reported the production of activated carbons from a novel precursor, esparto grass, by activation with carbon dioxide is presented. The results show that the materials produced have interesting properties, namely BET apparent surface area and pore volume up to 1122 m(2) g(-1) and 0.46 cm(3) g(-1), respectively. The activated carbons have basic characteristics with point of zero charge between 9.25 and 10.27 and show a very fascinating structure, as shown by the SEM images. (C) 2012 Elsevier B.V. All rights reserved.The authors are grateful to the Fundacao para a Ciencia e Tecnologia (Portugal) and the European Regional Development Fund (FEDER) through the Operational Programme for Competitiveness Factors (COMPETE) and QREN for financial support through Project PTDC/CTM/66552/2006 (FCOMP-01-0124-FEDER-007142) and under the Strategic Project PEst-OE/QUI/UI0619/2011 (CQE/UE).Valente Nabais, J.; Laginhas, C.; Ribeiro Carrott, MML.; Carrott, PJM.; Crespo Amorós, JE.; Nadal Gisbert, AV. (2013). Surface and porous characterisation of activated carbons made from a novelbiomass precursor, the esparto grass. Applied Surface Science. 265:919-924. doi:10.1016/j.apsusc.2012.11.164S91992426
Characterization of the surface of activated carbons produced from tire residues
The surface characterisation of new activated carbons produced from tire residues by
activation with carbon dioxide was studied. The activated carbons produced were mainly basic with
point of zero charge values above 8.8. The main surface functional groups identified by FTIR were
ether, quinones, lactones, ketones, hydroxyls (free and phenol) and pyrones. The XRD analysis
shows that the materials produced have a microstructural organisation with microcrystallite height
around 1.5nm and width from 3 to 5.3nm. This analysis indicates also the possible presence of
oxides (single or mixture) of the following heteroatoms: Fe, Al, Ca, Mg, Ti, Si, K, Pb, Cd, Ba, Zn
and Sn. The results have shown the significant potential of this type of residues for activated carbon
production. Furthermore, the environment friendly use of an industrial residue is also noteworthy
Ordered Mesoporous Titanosilicate Materials Prepared at Room Temperature: Synthesis Conditions vs Structural Properties
Structural Characterisation and Mechanical Stability of Titanium Substituted Mesoporous Materials
Phenol removal onto novel activated carbons made from lignocellulosic precursors: Influence of surface properties
Activated carbons with high nitrogen content by a combination of hydrothermal carbonization with activation
The work was funded by the FCT (Grants PEst-OE/QUI/UI0619/
2011 and SFRH/BD/82696/2011) with National (OE) and European
Union (FEDER, program COMPETE of QREN) funds