Nitrogen-doped titanium dioxide (N-TiO2) nanotubes were grown via electrochemical anodization on hot argon DC plasma pre-treated titanium substrates. The anodization process was performed in ethylene glycol based electrolyte solution containing NH4F and deionized water at constant potential at room temperature. N-TiO2 nanotubes were synthesized during their electrochemical formation. It was observed that plasma pre-treatment decreased the surface roughness of titanium substrates. The anodic N-TiO2 nanotubes grown on plasma treated titanium substrates were longer with more ordered periodic structure with hexagonal cross-sectional morphology comparing to the anodic N-TiO2 nanotubes grown on non-plasma treated (reference) titanium substrate. EDX analysis revealed that the N-TiO2 nanotubes were grown during the anodization process with in situ chemical doping. Optical measurements revealed that the anodic N-TiO2 nanotubes grown on plasma treated titanium substrates had slightly lower band gap energy (2.35 eV) compared to the N-TiO2 nanotubes grown on non-plasma treated titanium substrate (2.4 eV).
Journal of Inorganic and Organometallic Polymers and Materials – Springer Journals
Published: May 31, 2018
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