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Fabrication of Titania Nanotube Arrays in Viscous Electrolytes

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Abstract:

This study probes the dependence of titania nanotube arrays nanoarchitecture on different synthesis parameters in viscous electrolytes. Titania nanotube arrays were synthesized in glycerol, ethylene glycol and carboxymethylcellulose as base materials. The effects of anodization voltage and time, as well as chemical composition and pH of the electrolyte bath were studied. Nanotube arrays with an inner diameter ranging from 16 to 91 nm, and wall thickness ranging from 7 to 29 nm were fabricated in a glycerol–water electrolyte. Water content of 5 wt% or higher was found to be essential for nanotubes fabrication in glycerol electrolyte. Diameter and length were influenced by varying water content above 5 wt%. Nanotube length was found to be time dependent at high pH values. A pH value of 6 was favorable for fabrication of highly ordered and continuous nanotube arrays with length up to 900 nm. Using modified ethylene glycol (containing 2 wt% and 0.5 wt% NH4F) instead of glycerol, resulted in nanotube length up to 430 nm after 1.5 hr anodization time. With a minor modification of electrochemical anodization cell, we successfully fabricated double-sided titania nanotube arrays layers with a total thickness of 9.5 m for the first time. Nantube arrays were successfully fabricated in 2 wt% sodium carboxy mythylcellulose aqueous electrolyte (CMC electrolyte). These nanotube arrays had an inner diameter of 42 nm similar to those fabricated in 2 wt% urea–ethylene glycol electrolyte but their length was 450 nm.

Keywords: ANODIZATION; BANDGAP ENGINEERING; DOPING; HYDROGEN PRODUCTION; SOLAR APPLICATIONS; TITANIA NANOTUBE ARRAYS; WATER SPLITTING

Document Type: Research Article

DOI: https://doi.org/10.1166/jnn.2010.2102

Publication date: 2010-03-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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