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Anedic titanium oxidization (ATO) is a relatively simple technique that can be easily automated for preparing TiO2 nanotube arrays with high specific surface area.In the present work,we demonstrate the ability to fabricate TiO2 nanotube arrays of different pore size,length,and wall thickness by varying parameters such as the anodization voltage,time,and the concentration of the fluoride-containing electrolyte solution in the growing sysytm.Under optimized oxidation conditions,well-ordered nanotubes of TiO2 were successfully fabricated.Large area TiO2 nanotubes with average tube diameter of 75 nm,wall thickness 25 nm,and a length of 15μm were obtained by using the electrochemical anodization of pure Ti metal foil at 40 voltage in an electrolyte solution composed of 0.5 wt% NH4F and 2 wt% H2O with ethylene glycol for 16 hours.The morphology and thickness of the anodized TiO2 nanotube were observed by field emission scanning electron microscope showing a hollow tube structure.From the XRD diffraction pattern,it is indicated that the TiO2 nanotube is a well crystallized anatase phase after annealing at 450℃ for 6 hours.The largest surface area measured by BET is 43.7 m2/g,this high surface area is beneficial for subsequent dye absorbing for application in dye-sensitized solar ceils.