Effect of Washing Solution on Surface Morphology and Ash Content of Porous Carbon

Salman Masoudi Soltani; Sara Kazemi Yazdi

doi:10.4028/www.scientific.net/AMM.368-370.726

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 368-370Effect of Washing Solution on Surface Morphology...

Effect of Washing Solution on Surface Morphology and Ash Content of Porous Carbon

Abstract:

This work highlights the effect of post-washing stage on the surface morphology and ash content of the final porous carbon. Three different acids were selected to post-wash charred carbon including nitric, sulfuric and phosphoric acids. Scanning electron microscopy (SEM) showed that the surface of the washed carbon was not much affected by acidic washing. Moreover, the amount of retained ash for the three acids (proximate analyses) showed that nitric acid-washed carbon could best remove surface ash from the charred carbon. Energy dispersive x-ray (EDX) also showed the presence of various heavy metals and heteroatoms on carbon surface. The results suggest that nitric acid would be best among the investigated acids to remove our charred carbons surface ash. This would enable the synthesized carbon to be used in more sensitive applications. However, the available ash still needs to be reduced if the carbon is to target highly sensitive applications such as drinking water treatments.