Effect of nanostructured TiH₂ on the formation of multimeshworked and nanoporous TiO₂ by cathodic-anodization treatment

Cathodic-anodization process was performed to treat titanium sheets to improve biocompatible performance. Grazing incident X-ray diffraction, transmission electron microscopy, scanning electron microscopy and electrochemical measurement were used to evaluate the influence of hydrogen on the formation of nanoporous TiO₂. Multimeshworked and nanoporous TiO₂ was observed after treatment with cathodic-anodization process, The nanoporous oxide layer is hard to form without nano-TiH₂. The nano-TiH₂ plays an important role in forming multimeshworked and nanostructured TiO₂ layer. Hydrogen charging by cathodization is believed to enhance the formation of nanoporous oxide film and thus promote biocompatibility.