Efficient and Durable ZnO Core-Shell Structures for Photocatalytic Applications in Aqueous Media

dc.creatorANGELICA SAENZ TREVIZO
dc.creatorPatricia Amezaga Madrid
dc.creatorPedro Pizá Ruiz
dc.creatorWilber Antunez Flores
dc.creatorCarlos Elías Ornelas Gutiérrez
dc.creatorMARIO MIKI YOSHIDA
dc.date2016
dc.date.accessioned2023-07-21T15:32:02Z
dc.date.available2023-07-21T15:32:02Z
dc.identifierhttp://cimav.repositorioinstitucional.mx/jspui/handle/1004/2361
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7728262
dc.descriptionCore-shell nanostructures were synthesized by aerosol assisted chemical vapor deposition method. A ZnO nanorod (ZNR) was the core material, while the shell coating was individually film of Ti, Cu-Zn or Fe oxide. The crystalline phases of the synthesized materials were identified as oxides in the form of wurtzite (ZnO), anatase (TiO2), tenorite (CuO) and hematite (Fe2O3). Only for samples prepared using single Ti and Fe sources, amorphous shells were detected. The photocatalytic performance of all samples was tested by the discoloration of methylene blue. Findings confirmed that bare ZnO nanorods and commercial photocatalyst (Degussa P25) are comparable photocatalysts since 99% of dye discoloration was achieved in 60 min. Additionally, discoloration tests performed with the core-shell nanostructures revealed that the ZNR/TiOx and ZNR/CuO-ZnO samples exhibited more than 93% of discoloration in 60 min. Nevertheless, with samples involving ZNR/Fe2O3 and ZNR/FeOx/TiO2/Fe2O3, a maximum of 33% of dye discoloration was measured. Microstructural changes of the samples before and after the photo- catalysis essays were examined. Results showed that the bare ZnO and CuO-ZnO coated nanorods dis- solved in the aqueous medium. Conversely, the integrity of the ZnO core was evidenced through the morphological and structural analysis, when single TiOx and multiple FeOx and Fe2O3 layers, were employed. Furthermore, quantitative measurement of Zn solubility was performed in selected samples to confirm dissolution inhibition. Noteworthy, outcomes suggest that the functionality of ZnO when applied in aqueous systems could be assured solely with the developed ZNR/TiOx material
dc.formatapplication/pdf
dc.languageeng
dc.publisherCentro de Investigación en Materiales Avanzados
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rightshttp://creativecommons.org/about/cc0/
dc.subjectinfo:eu-repo/classification/Efficiency, Durability, ZnO, Core-Shell Structure, Photocatalysis, Aqueous Media/Efficiency, Durability, ZnO, Core-Shell Structure, Photocatalysis, Aqueous Media
dc.subjectinfo:eu-repo/classification/cti/7
dc.subjectinfo:eu-repo/classification/cti/33
dc.subjectinfo:eu-repo/classification/cti/3312
dc.subjectinfo:eu-repo/classification/cti/331208
dc.subjectinfo:eu-repo/classification/cti/331208
dc.titleEfficient and Durable ZnO Core-Shell Structures for Photocatalytic Applications in Aqueous Media
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/submittedVersion


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