Next Article in Journal
Discovery and Biological Evaluation of a Series of Pyrrolo[2,3-b]pyrazines as Novel FGFR Inhibitors
Next Article in Special Issue
Degradation of Methyl 2-Aminobenzoate (Methyl Anthranilate) by H2O2/UV: Effect of Inorganic Anions and Derived Radicals
Previous Article in Journal
Antisense Oligonucleotide-Based Therapy for Neuromuscular Disease
Previous Article in Special Issue
Sulfur-Doped Carbon Nitride Polymers for Photocatalytic Degradation of Organic Pollutant and Reduction of Cr(VI)
Article

Growth, Structure, and Photocatalytic Properties of Hierarchical V2O5–TiO2 Nanotube Arrays Obtained from the One-step Anodic Oxidation of Ti–V Alloys

1
Facultad de Ingeniería Química y Agroindustria, Escuela Politécnica Nacional, Ladrón de Guevara E11-253, P.O. Box 17-01-2759, Quito 170525, Ecuador
2
Centro de Investigación y Control Ambiental “CICAM”, Departamento de Ingeniería Civil y Ambiental, Facultad de Ingeniería Civil y Ambiental, Escuela Politécnica Nacional, Ladrón de Guevara E11-253, P.O. Box 17-01-2759, Quito 170525, Ecuador
3
Department of Environmental Technology, Faculty of Chemistry, University of Gdansk, Gdansk 80-308, Poland
4
Faculty of Chemistry, Nicolaus Copernicus University, Torun 87-100, Poland
*
Authors to whom correspondence should be addressed.
Academic Editor: Pierre Pichat
Molecules 2017, 22(4), 580; https://doi.org/10.3390/molecules22040580
Received: 29 January 2017 / Revised: 30 March 2017 / Accepted: 1 April 2017 / Published: 5 April 2017
(This article belongs to the Special Issue Photon-involving Purification of Water and Air)
V2O5-TiO2 mixed oxide nanotube (NT) layers were successfully prepared via the one-step anodization of Ti-V alloys. The obtained samples were characterized by scanning electron microscopy (SEM), UV-Vis absorption, photoluminescence spectroscopy, energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (DRX), and micro-Raman spectroscopy. The effect of the applied voltage (30–50 V), vanadium content (5–15 wt %) in the alloy, and water content (2–10 vol %) in an ethylene glycol-based electrolyte was studied systematically to determine their influence on the morphology, and for the first-time, on the photocatalytic properties of these nanomaterials. The morphology of the samples varied from sponge-like to highly-organized nanotubular structures. The vanadium content in the alloy was found to have the highest influence on the morphology and the sample with the lowest vanadium content (5 wt %) exhibited the best auto-alignment and self-organization (length = 1 μm, diameter = 86 nm and wall thickness = 11 nm). Additionally, a probable growth mechanism of V2O5-TiO2 nanotubes (NTs) over the Ti-V alloys was presented. Toluene, in the gas phase, was effectively removed through photodegradation under visible light (LEDs, λmax = 465 nm) in the presence of the modified TiO2 nanostructures. The highest degradation value was 35% after 60 min of irradiation. V2O5 species were ascribed as the main structures responsible for the generation of photoactive e and h+ under Vis light and a possible excitation mechanism was proposed. View Full-Text
Keywords: V2O5-TiO2 nanotubes; visible-light-driven photocatalysis; alloys; toluene degradation; air treatment V2O5-TiO2 nanotubes; visible-light-driven photocatalysis; alloys; toluene degradation; air treatment
Show Figures

Graphical abstract

MDPI and ACS Style

Nevárez-Martínez, M.C.; Mazierski, P.; Kobylański, M.P.; Szczepańska, G.; Trykowski, G.; Malankowska, A.; Kozak, M.; Espinoza-Montero, P.J.; Zaleska-Medynska, A. Growth, Structure, and Photocatalytic Properties of Hierarchical V2O5–TiO2 Nanotube Arrays Obtained from the One-step Anodic Oxidation of Ti–V Alloys. Molecules 2017, 22, 580. https://doi.org/10.3390/molecules22040580

AMA Style

Nevárez-Martínez MC, Mazierski P, Kobylański MP, Szczepańska G, Trykowski G, Malankowska A, Kozak M, Espinoza-Montero PJ, Zaleska-Medynska A. Growth, Structure, and Photocatalytic Properties of Hierarchical V2O5–TiO2 Nanotube Arrays Obtained from the One-step Anodic Oxidation of Ti–V Alloys. Molecules. 2017; 22(4):580. https://doi.org/10.3390/molecules22040580

Chicago/Turabian Style

Nevárez-Martínez, María C., Paweł Mazierski, Marek P. Kobylański, Grażyna Szczepańska, Grzegorz Trykowski, Anna Malankowska, Magda Kozak, Patricio J. Espinoza-Montero, and Adriana Zaleska-Medynska. 2017. "Growth, Structure, and Photocatalytic Properties of Hierarchical V2O5–TiO2 Nanotube Arrays Obtained from the One-step Anodic Oxidation of Ti–V Alloys" Molecules 22, no. 4: 580. https://doi.org/10.3390/molecules22040580

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop