In-situ Cr doped anodized TiO2 nanotubes with increased photocurrent response

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Trilochan Mishra, Lei Wang, Robert Hahn, Patrik Schmuki

Low-content chromium (Cr) doped titania nanotubes were grown by electrochemical anodization of Ti-Cr alloys in ethylene glycol electrolyte at varying time of anodisation to control the length of the tubes. Surface properties and photocurrent response of anodized layers after annealing at 450-750 °C were evaluated. Nanotubes with 0.02 at% Cr doping activated at 450 °C show a considerably increased photocurrent in comparison to pure anatase titania. This photocurrent increase of the Cr doped titania nanotubes is ascribed to higher anatase crystallinity and lower photoelectrochemical recombination losses.

Electrochimica Acta, Vol 132, 2014, Pages 410–415

Link: http://www.sciencedirect.com/science/article/pii/S0013468614006148

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