Synthesis of microporous eskolaite from Cr(VI) using activated carbon as a reductant and template Article uri icon

abstract

  • A novel technique has been devised for the synthesis of microporous α-Cr 2O 3 (eskolaite). The technique was based on the formation of amorphous-Cr 2O 3 onto microporous activated carbon through adsorption-reduction of dichromate ions (Cr2O72-) at the activated carbon/aqueous solution interface. Then, the Cr 2O 3-loaded carbon was thermally processed under oxidizing conditions to remove the carbon and recover the chromium oxide as α-Cr 2O 3. Both the Cr 2O 3-loaded carbon and the synthetic product were characterized by XRD, SEM, surface area and pore volume measurements. The synthetic eskolaite assayed 97.3%25 Cr 2O 3 and its specific surface area was 15.48m 2/g and pore size of 16.1å. © 2012 Elsevier Inc.

publication date

  • 2012-01-01