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The titanium oxide -based composite nanostructures been widely used because of their own excellent properties photocatalysis, sensors , bio - compatible materials and other fields . This paper mainly studied of NiTi, TiNbZr, TiAlV and TiNbTaZr alloy anodic oxidation process in an organic solution to prepare a uniform doping of the titanium oxide -based composite nanotubes . Hydrogen Sensitivities and wetting properties of the test process optimization based on titanium oxide -based composite nano tube . Experimental results show that the anodic oxidation medium, temperature, voltage, time, the Ni-Ti-O nanotubes morphology have a larger impact . When only 0.15M ( NH4 ) 2 SO 4 0.2M NH 4 F glycol ( 5%) of the volume fraction of glycerol the mixed solution, and controls the anode oxidation process is 30oC, 30V, 1.5h , can be prepared a uniform surface opening of the Ni-Ti-O nanotubes . Ni-Ti-O nanotubes in anodic oxide growth process can be substantially maintained Ni / Ti atomic percent within a certain range , which greatly reduces the toxicity of Ni atoms , can be expected in the bio - medical applications exhibit good biocompatibility and corrosion resistance. In the same time , Ni-Ti-O nanotubes will deform and collapse in a temperature higher than 400oC , Therefore , in practical applications , the use of Ni-Ti-O nanotubes temperature should not exceed 400oC . In organic solution , the anodic oxidation helps avoid Ti35Nb5Zr, TiNbTaZr alloy base body of two-phase non - uniform oxidation phenomenon , but not eliminate the differences of the two phases of the Ti6Al4V alloy substrate . The generated Ti -Nb -Zr - O, Ti - Nb -Ta -Zr - O , Ti - Al -VO nanotube surface covering layer of nano- tubes the porous layer , and the elevated temperature and voltage can not be dissolved in this layer is a nano-porous layer . Ti-Nb-O nanotubes containing H2 atmosphere at room temperature exhibit hydrogen Mintel exhibit good hydrogen Mintel nanotubes in the low - concentration atmosphere . Ti-Nb-Zr-O nanotubes showed a greater response in a low concentration under a hydrogen atmosphere , but its stability and repeatability is poor , Zr elements join but reduce its hydrogen Mintel . Nb, Zr -doped titanium alloy , chosen Ti35Nb alloy using 30oC , 15V , 4h anodic oxidation process , 450oC heat treatment process can be obtained hydrophilic properties best doping nanotubes . NiTi alloys in 30oC , 30V, 1.5h under after anodizing , and then after 400oC heat treatment obtained the optimal hydrophilic properties of the Ni-Ti-O nanotubes.
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