1.
J Colloid Interface Sci
; 374(1): 321-4, 2012 May 15.
Artigo
em Inglês
| MEDLINE
| ID: mdl-22365637
RESUMO
A novel technique has been devised for the synthesis of microporous α-Cr(2)O(3) (eskolaite). The technique was based on the formation of amorphous-Cr(2)O(3) onto microporous activated carbon through adsorption-reduction of dichromate ions (Cr(2)O(7)(2-)) at the activated carbon/aqueous solution interface. Then, the Cr(2)O(3)-loaded carbon was thermally processed under oxidizing conditions to remove the carbon and recover the chromium oxide as α-Cr(2)O(3). Both the Cr(2)O(3)-loaded carbon and the synthetic product were characterized by XRD, SEM, surface area and pore volume measurements. The synthetic eskolaite assayed 97.3% Cr(2)O(3) and its specific surface area was 15.48 m(2)/g and pore size of 16.1 Å.