Impact of the anodization time on the photocatalytic activity of TiO2 nanotubes

Titanium oxide nanotubes (TNTs) were anodically grown in ethylene glycol electrolyte. The influence of the anodization time on their physicochemical and photoelectrochemical properties was evaluated. Concomitant with the anodization time, the NT length, fluorine content, and capacitance of the space...

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Bibliographic Details
Published in:Beilstein journal of nanotechnology 2018, Vol.9 (1), p.2628-2643
Main Authors: Díaz-Real, Jesús A, Dubed-Bandomo, Geyla C, Galindo-de-la-Rosa, Juan, Arriaga, Luis G, Ledesma-García, Janet, Alonso-Vante, Nicolas
Format: Article
Language:English
Subjects:
Anodizing
Carbon
Catalytic activity
Electrodes
Electrolytes
Electronic properties
Energy gap
Ethylene glycol
Fluorine
fluorine doping
Full Research Paper
Methylene blue
Morphology
Nanoparticles
Nanoscience
Nanotechnology
Nanotubes
Optoelectronics
Photocatalysis
photocatalytic activity
photoelectrochemistry
Photooxidation
Scanning electron microscopy
Space charge
Titanium dioxide
Titanium oxides
titanium(IV) oxide (TiO2)
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Summary:Titanium oxide nanotubes (TNTs) were anodically grown in ethylene glycol electrolyte. The influence of the anodization time on their physicochemical and photoelectrochemical properties was evaluated. Concomitant with the anodization time, the NT length, fluorine content, and capacitance of the space charge region increased, affecting the opto-electronic properties (bandgap, bathochromic shift, band-edge position) and surface hydrophilicity of TiO2 NTs. These properties are at the origin of the photocatalytic activity (PCA), as proved with the photooxidation of methylene blue.
ISSN:2190-4286
2190-4286
DOI:10.3762/bjnano.9.244