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Well crystallized niobium-doped TiO_2 nanotube arrays(TiNbO-NT) were successfully synthesized via the anodization of titanium/niobium alloy sheets,followed with a heat treatment at 550 C for 2 h.Morphology analysis results demonstrated that both the titanium/niobium alloy microstructure and the dissolution strength of electrolyte played major roles in the formation of nanotube structure.A single-phase microstructure was more favorable to the formation of uniform nanotube arrays,while modulating the dissolution strength of electrolyte was required to obtain nanotube arrays from the alloys with multi-phase microstructures.X-ray diffraction(XRD) and X-ray photoelectron(XPS) analysis results clearly demonstrated that niobium dopants(Nb 5+) were successfully doped into TiO_2 anatase lattice by substituting Ti 4+ in this approach.
Well crystallized niobium-doped TiO 2 nanotube arrays (TiNbO-NT) were successfully synthesized via the anodization of titanium / niobium alloy sheets, followed by a heat treatment at 550 C for 2 h. Morphology analysis results of both the titanium / niobium alloy microstructure and the dissolution strength of the EOF played a major role in the formation of nanotube arrays. A single-phase microstructure was more favorable to the formation of uniform nanotube arrays, while modulating the dissolution strength of electrolyte was required to obtain nanotube arrays from the alloys with multi -phase microstructures. X-ray diffraction (XRD) and X-ray photoelectron (XPS) analysis results clearly demonstrated that niobium dopants (Nb 5+) were successfully doped into TiO_2 anatase lattice by substituting Ti 4+ in this approach.