Fotoeletrodegradação do corante AO7 utilizando filmes de nanocompósitos de ZnO-TiO2
The Zn-TiO2nanocomposite films were prepared by electrodeposition, using an acidic zinc sulphate solution with TiO2 nanoparticles in suspension. The as-deposited samples have been heated in air at 450 ºC for 6 h. The XRD and SEM analyses pointed out to the metal matrix conversion from Zn to ZnO and...
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Published in | Química Nova Vol. 35; no. 1; pp. 30 - 34 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Sociedade Brasileira de Química
2012
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Subjects | |
Online Access | Get full text |
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Summary: | The Zn-TiO2nanocomposite films were prepared by electrodeposition, using an acidic zinc sulphate solution with TiO2 nanoparticles in suspension. The as-deposited samples have been heated in air at 450 ºC for 6 h. The XRD and SEM analyses pointed out to the metal matrix conversion from Zn to ZnO and a rich morphology of needles-shaped grains. These materials were used on the photoelectrochemical degradation of AO7, which was efficiently degraded, with 40% of color removal, after 2 h period at 1.0 V, under white light irradiation. The apparent first order rate constant of the photoelectrodegradation reaction was 4.12 x 10-3 min-1. |
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ISSN: | 0100-4042 1678-7064 |
DOI: | 10.1590/S0100-40422012000100006 |