Publicación:
Influence of pyrolytic seeds on ZnO nanorod growth onto rigid substrates for photocatalytic abatement of Escherichia coli in water
Influence of pyrolytic seeds on ZnO nanorod growth onto rigid substrates for photocatalytic abatement of Escherichia coli in water
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Fecha
2014
Autores
Sanchez, L
Guz, L
Garcia, P
Ponce, S
Goyanes, S
Marchi, MC
Candal, R
Estrada, W
Rodriguez, J
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Editor
IWA Publishing
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Abstracto
ZnO nanorods (ZnO NRs) were grown on ZnO seeded fluorine doped tin oxide (FTO) substrates at low
temperatures (90 W
C) from Zn2þ precursors in alkaline aqueous solution. The ZnO seeds were
deposited on the FTO substrate heated at 350 W
C by spray pyrolysis of a zinc acetate solution in a
water ethanol mixture. The structure of seeds was tuned by the ethanol water ratio, Γ, which
controls the solvent evaporation rate of drops impinging the substrate. The relationship between the
microstructure and optical properties of the ZnO NR films and the photocatalytic antibacterial activity
for Escherichia coli abatement, was determined through a detailed characterization of the material.
The higher photocatalytic antibacterial activity was performed by ZnO NR films grown on seeds
deposited from solutions with Γ in the 0.0–0.03 range. With these films, the population of viable
E. coli dropped more than six orders, from 8 × 108 to 4 × 102 CFU. These results show the potential of
these materials in water disinfection.
Descripción
140-FINCYT-IB-2013/Concytec-403-2012/2011-02-CONCYTEC
Palabras clave
nanorods,
photocatalytic disinfection,
spray pyrolysis