Fabrication of hollow TiO2 nanotubes through atomic layer deposition and MWCNT templates

Borbón-Nuñez, H.A.; Domínguez, D.; Muñoz‐Muñoz, Franklin; López, Jesús A.; Romo-Herrera, J. M.; Soto, G.; Tiznado, H.

doi:10.1016/j.powtec.2016.12.001

Cited by 34 publications

(26 citation statements)

References 55 publications

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“…Figure 7 shows the Raman spectra of pristine TiO 2 and V 2 O 5 -TiO 2 NTs. The observed peaks at approximately 150, 396, 515, and 636 cm −1 are ascribed to the E g , B 1g , A 1g + B 1g , and E g modes of the anatase phase, respectively, in agreement with previous reports [ 42 , 72 , 73 , 74 ]. The E g modes are assigned to TiO 2 symmetry, B 1g to O-Ti-O bending, and A 1g + B 1g to Ti-O stretching [ 75 ].…”

Section: Resultssupporting

confidence: 92%

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

et al. 2017

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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.

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Section: Resultssupporting

confidence: 92%

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

et al. 2017

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“…A few methods, such as the electrochemical anodization [36][37][38][39], atomic layer deposition (ALD) [40][41][42] and hydrothermal synthesis [43][44][45] have been developed for the preparation of metal oxide nanotubes [45][46][47][48][49][50][51]. ALD is a template-assisted technique for the synthesis of nanotubular arrays and requires post-processing separation of the obtained tubes from the template [52].…”

Section: Synthesis Of Low-dimensional Materialsmentioning

confidence: 99%

Chemical Gas Sensors Studied at SENSOR Lab, Brescia (Italy): From Conventional to Energy-Efficient and Biocompatible Composite Structures

Galstyan

Kaur

Zappa

et al. 2020

Sensors

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In this paper, we present the investigations on metal oxide-based gas sensors considering the works performed at SENSOR lab, University of Brescia (Italy). We reported the developments in synthesis techniques for the preparation of doped and functionalized low-dimensional metal oxide materials. Furthermore, we discussed our achievements in the fabrication of heterostructures with unique functional features. In particular, we focused on the strategies to improve the sensing performance of metal oxides at relatively low operating temperatures. We presented our studies on surface photoactivation of sensing structures considering the application of biocompatible materials in the architecture of the functional devices as well.

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“…Different approaches have been used for the synthesis of TiO 2 nanotubular structures, such as atomic layer deposition (ALD) [19], hydrothermal synthesis [20], and electrochemical anodization [21].…”

Section: Introductionmentioning

confidence: 99%

Effect of Morphology on the Photoelectrochemical Activity of TiO2 Self-Organized Nanotube Arrays

et al. 2020

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In the present work, highly ordered titanium dioxide (TiO 2 ) nanotube anodes were grown using a rapid anodization process. The photoelectrochemical performances of these electrodes strongly depend on the anodization conditions. Parameters such as electrolyte composition, anodization potential and anodization time are shown to affect the geometrical parameters of TiO 2 nanotubes. The optimal anodization parameters are determined by photocurrent measurements, linear sweep voltammetry and electrochemical impedance spectroscopy. The thickness of the tube wall and its homogeneity is shown to strongly depend on the anodization potential, and the formation mechanism is discussed. This study permits the optimization of the photocurrent density and contributes to further improvement of the photoelectrochemical water-splitting performance of TiO 2 nanotube photoelectrodes.

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Fabrication of hollow TiO2 nanotubes through atomic layer deposition and MWCNT templates

Cited by 34 publications

References 55 publications

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

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

Chemical Gas Sensors Studied at SENSOR Lab, Brescia (Italy): From Conventional to Energy-Efficient and Biocompatible Composite Structures

Effect of Morphology on the Photoelectrochemical Activity of TiO2 Self-Organized Nanotube Arrays

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