Reference : Role of defects on the enhancement of the photocatalytic response of ZnO nanostructures
Scientific journals : Article
Engineering, computing & technology : Materials science & engineering
Engineering, computing & technology : Chemical engineering
Physical, chemical, mathematical & earth Sciences : Chemistry
http://hdl.handle.net/2268/224857
Role of defects on the enhancement of the photocatalytic response of ZnO nanostructures
English
Montero-Munoz, M. [University of Brasilia, Brazil > Institute of Physics > > >]
Ramos-Ibarra, J. E. [University of Brasilia, Brazil > Institute of Physics > > >]
Rodríguez-Páez, Jorge E. [University of Cauca, Colombia > Department of Physics > > >]
Teodoro, Marcio D. [Federal University of São Carlos, Brazil > Department of Physics > > >]
Marques, Gilmar E. [Federal University of São Carlos, Brazil > Department of Physics > > >]
Sanabria, Alfonso R. [University of Cauca, Colombia > Department of Chemistry > > >]
Cajas, Paola C. [University of Brasilia, Brazil > Department of Mechanical Engineering > > >]
Pàez Martinez, Carlos mailto [Université de Liège - ULiège > Department of Chemical Engineering > Génie chimique - Nanomatériaux et interfaces >]
Heinrichs, Benoît mailto [Université de Liège - ULiège > Department of Chemical Engineering > Génie chimique - Nanomatériaux et interfaces >]
Coaquira, Jose A. H. [University of Brasilia, Brazil > Institute of Physics > > >]
2018
Applied Surface Science
Elsevier
448
646-654
Yes (verified by ORBi)
International
0169-4332
Netherlands
[en] ZnO nanostructure ; Synthesis solvents ; Morphology ; Defects ; Photocatalytic activity
[en] Zinc oxide (ZnO) nanostructures have been synthesized by a simple controlled precipitation method to study the effects of the type solvent – including water, acetic acid and ethylene glycol – on the formation of ZnO and on its photocatalytic activity for the decomposition of H2O2 in aqueous solution. Scanning electron microscopy (SEM) and synchrotron-based X-ray diffraction (XRD) were used to determine the morphology, crystallinity, and chemical composition of the ZnO structures. Raman spectroscopy and photoluminescence measurements were carried out to determine the nature of the defects present in the different ZnO nanostructures and how they affect the photocatalytic activity. Based on the results, we propose plausible growth mechanisms underlying the formation of ZnO with different morphology, according to the solvent used during the synthesis. A direct relation between the photocatalytic activity and the defects type was established, suggesting that defects play a vital role in modulating the photocatalytic response.
http://hdl.handle.net/2268/224857
10.1016/j.apsusc.2018.04.105

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