Cadmium sulfide photocatalysed reduction of malachite green by ascorbic acid and EDTA as reductants

Abstract

Foi efetuada a fotoredução do verde de malaquita na presença de CdS como fotocatalizador e ácido ascorbico/EDTA como redutores. Foram estudados os efeitos de diferentes parâmetros como pH, concentração de verde de malaquita, redutores, quantidade de semicondutor e intensidade de luz, na velocidade da reação fotocatalítica. Levando em conta os dados obtidos propomos um de mecanismo.para a fotoredução do verde de malaquita.The photoreduction of malachite green in presence of CdS as photocatalyst and ascorbic acid/ EDTA as reductants has been carried out. The effect of different parameters like pH, concentration of malachite green, reductants, amount of semiconductor and light intensity on the rate of photocatalytic reaction has been studied. On the basis of observed data, a tentative mechanism for the photoreduction of malachite green has been proposed.

Use of Barium Chromate in Photocatalytic Degradation of Eosin Yellow

“…Panwar et al, 17 observed the degradation of some dyes using zirconium phosphate photocatalyst. Kothari et al, 18 worked on the photoreduction of Congo red by ascorbic acid and EDTA over cadmium sulphide as photocatalyst.…”