Journal
CARBON
Volume 46, Issue 6, Pages 850-857Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2008.02.014
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We developed a simple synthesis of shape-controlled porous carbon materials that combine a high porosity of over 80% with a high Brunauer-Emmett-Teller surface area of 670 m(2)/g. The synthesis involves flash heating of sawdust and subsequent low-temperature heat treatment (380 degrees C). Flash heating changed the morphology of the sawdust to the specific three-dimensional microtexture of amorphous carbon, and the subsequent heat treatment dramatically increased the surface area of the shape-controlled porous carbon materials. The products consisted of cross-linked carbon beams containing surface micro-pores (pore size < 2 nm) and meso-pores (5 nm < pore size < 50 nm). Moreover, macro-pores (5 mu m < pore size < 50 mu m) were found between the cross-linked carbon beams. (C) 2008 Elsevier Ltd. All rights reserved.
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