Electrochemical Fabrication and Characterization of Highly-Ordered Titania Nanotube Arrays

Highly-ordered titania nanotube arrays were fabricated in ethylene glycol polar organic electrolyte containing a certain amount of sodium fluoride. Series of patterned nanotube arrays with different outside diameter and aspect ratio were obtained via optimizing anodic voltage, the concentration of fluoride ion and reaction time. The as-prepared nanotube arrays were amorphous and transformed single anatase phase characterized by X-ray diffraction with annealing under the condition of 450oC for 3h. Cyclic voltammogram behaviors were discussed using electrochemical workstation. The pH value of electrolyte, the scanning rate, the crystal structure and morphology of the samples have a significant effect on the reductive/oxidative and H+ intercalation properties.

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[ARTICLE WITHDRAWN] Synthesis and Characterization of Self-Organized Titania Nanotube Arrays by Electrochemical Anodization of Titanium Metal and Ti–6Al–4V Alloy

Advanced Science Engineering and Medicine ◽

10.1166/asem.2014.1544 ◽

2014 ◽

Vol 6 (5) ◽

pp. 608-611

Author(s):

I. V. S. Yashwanth ◽

I. Gurrappa

Keyword(s):

Electrochemical Anodization ◽

Synthesis And Characterization ◽

Nanotube Arrays ◽

Titanium Metal ◽

Self Organized ◽

Titania Nanotube Arrays ◽

Titania Nanotube

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Supercapacitor electrodes based on modified titania nanotube arrays on flexible substrates

International Journal of Materials Research (formerly Zeitschrift fuer Metallkunde) ◽

10.1515/ijmr-2020-7828 ◽

2021 ◽

Vol 0 (0) ◽

Author(s):

Kunnambeth M. Thulasi ◽

Sindhu Thalappan Manikkoth ◽

Anjali Paravannoor ◽

Shajesh Palantavida ◽

Baiju Kizhakkekilikoodayil Vijayan

Keyword(s):

Metal Oxides ◽

Electrochemical Impedance ◽

Titanium Foil ◽

Nanotube Arrays ◽

Metal Foil ◽

X Ray Diffraction ◽

Nanotube Array ◽

Titania Nanotube Arrays ◽

Titania Nanotube ◽

Supercapacitor Performance

Abstract Highly ordered titania nanotube arrays were synthesised on titanium metal foil through electrochemical anodisation. The annealed samples were characterised through scanning electron microscopy and X-ray diffraction analysis. The electrochemical characterisations of the arrays were done through cyclic voltammetry, galvanostatic charge discharge and electrochemical impedance spectroscopy analyses. The titania nanotube arrays exhibited a specific capacitance of 6.8 mF cm–2 at 5 mV s–1 scan rate, which is very much higher than that reported earlier. Pseudocapacitive metal oxides were deposited on these arrays forming composite supercapacitor electrodes and their supercapacitor properties were compared with same deposited on bare titanium foil substrates. Pseudocapacitive metal oxides deposited on these titania nanotube array substrates exhibited improved supercapacitor performance and stability over the same deposited on titanium foil substrates.

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Photocatalytic Properties of Size-Controlled Titania Nanotube Arrays

International Journal of Electrochemistry ◽

10.4061/2011/656939 ◽

2011 ◽

Vol 2011 ◽

pp. 1-7 ◽

Cited By ~ 2

Author(s):

Takeshi Hashishin ◽

Keisuke Misawa ◽

Kazuo Kojima ◽

Chihiro Yogi ◽

Jun Tamaki

Keyword(s):

Crystallite Size ◽

Rate Constant ◽

Apparent Rate Constant ◽

Anatase Phase ◽

Ultra Violet ◽

Tube Length ◽

Nanotube Arrays ◽

Titania Nanotube Arrays ◽

Titania Nanotube ◽

Inner Diameter

The titania nanotube arrays (TNAs) with smooth surface was synthesized by anodization of titanium foil with 3 cm2in square area using the electrolyte composed of 0.2 wt% NH4F and 0.5 vol% H2SO4in ethylene glycol in order to evaluate the methylene blue photodegradation under ultra-violet irradiation. The tube length and inner diameter as a size parameter were controlled by the anodization time from 5 to 10 h and applied voltage from 10 to 50 V. The titania nanotube arrays (TNAs) annealed at 300 to 500°C were assigned to anatase phase, and TNAs at 600°C had both phase of anatase and rutile. The crystallite size and the apparent rate constant were increased with the increase in the annealing temperature of TNAs from 300 to 500°C. The bigger crystallite size of TNAs is suggested to be related to the increase in the amount of hole at the valence band, leading to the decrease in the apparent rate constant of MB degradation. Interestingly, the four kinds of linear relationship with the apparent rate constant were seen in both the inner diameter of TNAs and the length. Consequently, the apparent rate constant strongly depended on inner diameter of TNAs.

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