This paper presents the study on the growth of bundled titanium dioxide (TiO 2 ) nanotubes via rapid breakdown anodization method by using chloride-based electrolyte. The effects of different ratios of deionized water (DI) to ethylene glycol (EG) on the morphological, structural and photoelectrochemical properties of the TiO 2 nanotubes generated were investigated. Different ratios of DI:EG showed significant changes on the diameter of nanotube bundles. Besides that, X-ray diffraction measurements revealed that anatase phase of titanium dioxide appeared within the thermally treated samples. Scherrer method was applied to calculate the mean crystallite size of the crystal growth in this study. The photoelectrochemical properties of TiO 2 nanotube bundles were characterized by using three-electrode photoelectrochemical cell and showed good photocurrent response and stability.

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