%0 Journal Article
%T Synthesis of TiO2 by the pechini method and photocatalytic degradation of methyl red
%A Ribeiro
%A Pollyana Caetano
%A Costa
%A Ana Cristina Figueiredo de Melo da
%A Kiminami
%A Ruth Herta Goldschmidt Aliaga
%A Sasaki
%A Jos¨¦ Marcos
%A Lira
%A H¨¦lio Lucena
%J Materials Research
%D 2013
%I ABM, ABC, ABPol, SBCC, SBCr, SBMM, SBPMat
%R 10.1590/S1516-14392012005000176
%X this work evaluated the catalytic activity of tio2 synthesized by the pechini method. with varying molar ratios of 2:1, 3:1 and 4:1 of citric acid/metallic cations, in the photocatalytic degradation of methyl red dye in aqueous solution. the samples were characterized by x-ray diffraction, phase quantification by rietveld structure refinement, and textural analysis by nitrogen adsorption, and their photocatalytic performance was bench- tested. the results indicated that the 3:1 and 4:1 samples contained two phases, with 84.4 and 89% of anatase phase and 15.6 and 11% of rutile phase, respectively. the 2:1 sample contained only anatase phase. the total discoloration of methyl red dye in 24 hours confirmed the high photocatalytic efficiency of the 2:1 sample, which was ascribed to the formation of monophasic anatase.
%K photocatalysis
%K methyl red dye
%K titanium dioxide
%K pechini method.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S1516-14392012005000176&lng=en&nrm=iso&tlng=en