Preparation method of titanium dioxide nanotube array with orientation structure

Abstract

The invention provides a preparation method of a titanium dioxide nanotube array with an orientation structure. The preparation method comprises the technological process and steps: placing a polished titanium sheet into NH4F, H2O and ethylene glycol for preparing the titanium dioxide nanotube array by adopting an anodic oxidization method, performing ultrasonic and nitrogen-purging to remove a thin membrane prepared after primary oxidization, then continuously performing secondary anodic oxidization, and washing the prepared titanium dioxide nanotube array in isopropanol; respectively annealing at the temperature of 450 DEG C at the temperature rise speed of 0.5DEG C / min under vacuum situation, insulating for two hours, annealing in the air, and comparing. The prepared titanium dioxide nanotube array with the aperture of about 100nm and the tube wall thickness of about 10nm is orderly in structure, the highly-crystallized orderly titanium dioxide nanotube array can be obtained under the vacuum annealing condition, the super capacitance capacity can achieve 9.44mF cm<-2>, a lithium battery can achieve 319mAh g<-1>, the prepared high crystallization-oriented titanium dioxide nanotube array has good application prospects in the aspect of energy storage.

Description

technical field [0001] The invention relates to a method for preparing a titanium dioxide nanotube array, in particular to a method for preparing an orientation-textured titanium dioxide nanotube array. Background technique [0002] In the past ten years, the application of nano-semiconductors in various fields has been widely studied. Optical, electrical, catalytic, magnetic properties. Among them, nanotube arrays have unique physical and chemical properties due to their unique structures such as nanoscale pore size and high specific surface area, and have an irreplaceable position in the field of materials science. [0003] Titanium dioxide nanotube arrays have a very wide range of applications in the energy field, TiO 2 The surface of the nanotube array has good adsorption properties due to its highly ordered tubular structure. It has a large specific surface area and is neatly arranged. It can absorb more dye molecules than nanoporous films, and almost all dye mole...

AI Technical Summary

Problems solved by technology

Our group has used annealing in nitrogen and doped with lead to obtain a material with a certain orientation texture, but the orientation texture is not strong, and the use of heavy metals is harmful to the environment.

[0005] For titanium dioxide nanotube arrays prepared by anodic oxidation, the traditional process of air annealing has been used, and the obtained titanium tubes have no orientation texture, so the conductivity is relatively poor, which greatly limits the performance of practical applications.

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