Abstract
Multi-non-metal-doped TiO 2 nanotubes were fabricated by electrochemical anodization of Ti in the mixed acid electrolyte of C 2H 2O 4·2H 2O and HIO 3 containing NH 4F. The samples were annealed in air and characterized by FE–SEM, XRD, XPS and DRS. The results indicate non-metals of N, F and I are successfully doped into TiO 2 nanotubes in aqueous solution by adjusting the electrolyte composition. The multi-non-metal-doped samples display a significant visible-light response. Additionally, the atomic concentration of non-metals is closely related with the electrolyte composition.
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