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Proceedings of ABM Annual Congress


ISSN 2594-5327

69th ABM International Annual Congress Vol. 69, Num. 69 (2014)


Title

PHOTOCATALYTIC ACTIVITY OF ZINC OXIDE NANOSTRUCTURED SYNTHESIZED BY COMBUSTION IN SOLUTION

PHOTOCATALYTIC ACTIVITY OF ZINC OXIDE NANOSTRUCTURED SYNTHESIZED BY COMBUSTION IN SOLUTION

Authorship

DOI

10.5151/1516-392X-24629

Downloads

273 Downloads

Abstract

With the growth of nanoscience and nanotechnology, the synthesis of nanostructured oxides has received a special attention. Metal oxides are widely used in the manufacture of microelectronic circuits, piezoelectric devices, fuel cells, catalysts, filters and bactericides systems. These metal oxides represent a large class of semiconductor materials suitable for photocatalytic processes. In recent years, new materials of this class such as TiO2 and ZnO have been developed due to their photo-catalytic abilities to degrade various environmental pollutants. This work aimed to evaluate the photocatalytic activity of zinc oxide previously synthesized by combustion synthesis in solution using citric acid as fuel and different reasons fuel/oxidant. After synthesis, the powders were subjected to heat treatments at different temperatures and photo-catalysis. The photocatalytic activity was evaluated by the degradation of a solution of methyl orange in a photochemical reactor of UV illumination, after which the transmittance of the samples measured with the assistance of a spectrophotometer. To analyze the results, a commercial zinc oxide was used as standard. The products of combustion synthesis in solution showed that photocatalytic activity varied according to the ratio fuel/oxidant and as a function of heat treatment. The results showed a higher photocatalytic activity for the products obtained with disabilities fuel in the reaction and heat treated.

 

With the growth of nanoscience and nanotechnology, the synthesis of nanostructured oxides has received a special attention. Metal oxides are widely used in the manufacture of microelectronic circuits, piezoelectric devices, fuel cells, catalysts, filters and bactericides systems. These metal oxides represent a large class of semiconductor materials suitable for photocatalytic processes. In recent years, new materials of this class such as TiO2 and ZnO have been developed due to their photo-catalytic abilities to degrade various environmental pollutants. This work aimed to evaluate the photocatalytic activity of zinc oxide previously synthesized by combustion synthesis in solution using citric acid as fuel and different reasons fuel/oxidant. After synthesis, the powders were subjected to heat treatments at different temperatures and photo-catalysis. The photocatalytic activity was evaluated by the degradation of a solution of methyl orange in a photochemical reactor of UV illumination, after which the transmittance of the samples measured with the assistance of a spectrophotometer. To analyze the results, a commercial zinc oxide was used as standard. The products of combustion synthesis in solution showed that photocatalytic activity varied according to the ratio fuel/oxidant and as a function of heat treatment. The results showed a higher photocatalytic activity for the products obtained with disabilities fuel in the reaction and heat treated.

Keywords

Photocatalysis; Zinc oxide; Nanostructured; Combustion in solution

Photocatalysis; Zinc oxide; Nanostructured; Combustion in solution

How to cite

Waleska Campos Guaglianoni; Ana Paula Garcia; Tania Maria Basegio; Carlos Pérez Bergmann; Juliano SCHORNE PINTO; Jaqueline Oliveira Barnasque. PHOTOCATALYTIC ACTIVITY OF ZINC OXIDE NANOSTRUCTURED SYNTHESIZED BY COMBUSTION IN SOLUTION, p. 7347-7354. In: 69th ABM International Annual Congress, São Paulo - Brasil, 2014.
ISSN: 2594-5327, DOI 10.5151/1516-392X-24629