On surface energy and acid–base properties of highly porous parent and surface treated activated carbons using inverse gas chromatography
Abstract This study provides the surface characteristics (surface energy and the acid–base properties) of surface treated activated carbons (ACs) using inverse gas chromatography. The surface energy and the acid–base characteristic of studied adsorbents are determined by the retention time using several non-polar and polar probes at 140°C. It is observed that the dispersive surface energy dominates for all AC samples. The treatment of Maxsorb III with H 2 exhibits the highest basicity due to lower oxygen content on the surface. The presented results express further insights and useful information in functionalizing the activated carbon for various industrial applications. Highlights IGC technique is used to explore of surface energy and acid–base properties of AC. Surface energy of modified AC decreases with increasing the surface loading. Surface treatment of the parent AC with H 2 enhances the surface energy. H 2 -Maxsorb III shows the highest basicity due to lower O 2 content on the surface. XPS analysis is conducted for confirming the surface characteristics. Graphical abstract [DISPLAY OMISSION]
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