Resumo

BRICENO, Nelson O; GUZMAN, Martha Y  e  DIAZ, José de J. SURFACE GROUPS ON CARBONACEOUS MATERIALS.CHARACTERIZATION BY DIFFERENT TECHNIQUES. Rev.Colomb.Quim. [online]. 2007, vol.36, n.1, pp. 121-130. ISSN 0120-2804.

The surface chemistry of two commercial carbonaceous materials was modified by hydrogen, 8.8% oxygen in nitrogen and nitric acid. These treatments produce diverse characteristics on the surface of the carbonaceous materials, which were confirmed by potentiometric and Boehm titrations, and temperature programmed desorption analysis (TPD). The results are related to the presence or absence of oxygenated surface groups.

Palavras-chave : Activated carbon; carbon black; thermal treatments; surface chemistry.