ZnO nanorods (ZnO NRs) were grown on ZnO seeded fluorine doped tin oxide (FTO) substrates at low temperatures (90 °C) from Zn2+ precursors in alkaline aqueous solution. The ZnO seeds were deposited on the FTO substrate heated at 350 °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.
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Research Article|
June 30 2014
Influence of pyrolytic seeds on ZnO nanorod growth onto rigid substrates for photocatalytic abatement of Escherichia coli in water Available to Purchase
Luis Sanchez;
Luis Sanchez
1Universidad Nacional de Ingeniería, Lima, Perú
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Lucas Guz;
Lucas Guz
2Escuela de Ciencia y Tecnología, Universidad Nacional de San Martín, Argentina
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Pilar García;
Pilar García
1Universidad Nacional de Ingeniería, Lima, Perú
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Silvia Ponce;
Silvia Ponce
3University of Lima, Lima, Perú
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Silvia Goyanes;
Silvia Goyanes
4Departamento de Física, FCEyN, Universidad de Buenos Aires, IFIBA-CONICET, Argentina
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María Claudia Marchi;
María Claudia Marchi
5INQUIMAE, FCEyN, Universidad de Buenos Aires, Argentina
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Roberto Candal;
Roberto Candal
2Escuela de Ciencia y Tecnología, Universidad Nacional de San Martín, Argentina
5INQUIMAE, FCEyN, Universidad de Buenos Aires, Argentina
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Walter Estrada;
Walter Estrada
1Universidad Nacional de Ingeniería, Lima, Perú
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Juan Rodriguez
1Universidad Nacional de Ingeniería, Lima, Perú
E-mail: [email protected]
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Water Supply (2014) 14 (6): 1087–1094.
Article history
Received:
December 10 2013
Accepted:
June 16 2014
Citation
Luis Sanchez, Lucas Guz, Pilar García, Silvia Ponce, Silvia Goyanes, María Claudia Marchi, Roberto Candal, Walter Estrada, Juan Rodriguez; Influence of pyrolytic seeds on ZnO nanorod growth onto rigid substrates for photocatalytic abatement of Escherichia coli in water. Water Supply 1 December 2014; 14 (6): 1087–1094. doi: https://doi.org/10.2166/ws.2014.068
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