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A method for preparing ordered arrays of titania hierarchical nanotubes composed of anatase single crystal particles with controllable morphology

A technology of nanotube arrays and titanium dioxide, which is applied in the field of preparation of ordered arrays of titanium dioxide hierarchical nanotubes, can solve the problem that complex single crystal structures are difficult to synthesize, and achieve the effect of low cost and simple operation

Inactive Publication Date: 2016-05-11
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

However, special morphology, such as complex single crystal structure such as hollow hierarchical structure, is still difficult to synthesize

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  • A method for preparing ordered arrays of titania hierarchical nanotubes composed of anatase single crystal particles with controllable morphology
  • A method for preparing ordered arrays of titania hierarchical nanotubes composed of anatase single crystal particles with controllable morphology
  • A method for preparing ordered arrays of titania hierarchical nanotubes composed of anatase single crystal particles with controllable morphology

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Embodiment Construction

[0018] A method for preparing an ordered array of titanium dioxide hierarchical nanotubes composed of anatase single crystal particles with controllable morphology, comprising the following steps:

[0019] (1) Ultrasonic cleaning of 99.9% pure titanium sheets in a mixed solution of ethanol and acetone with a volume ratio of 1:1 for about 30 minutes to remove organic matter on the surface, and then repeated ultrasonic cleaning with deionized water, nitrogen flow at room temperature Blow dry, then put the cleaned and dried titanium sheet into an electrolytic cell containing 0.2M hydrofluoric acid ethylene glycol electrolyte solution, apply a constant voltage of 100V for anodic oxidation, and the oxidation time is about 1 hour, then put the anode The oxidized titanium sheet is taken out, placed in absolute ethanol for ultrasonic vibration, and the disordered anodized titanium dioxide nanotubes on the surface are removed, leaving an ordered array layer of anodized titanium dioxide ...

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Abstract

The invention discloses a preparation method of a titanium dioxide hierarchical nano-tube ordered array consisting of controllable-morphology anatase single-crystal particles. The method comprises the following steps of: firstly synthesizing an anodic-oxidation titanium dioxide nano-tube; and then performing hydro-thermal treatment on the anodic-oxidation titanium dioxide nano-tube by use of hydrofluoric acids with different concentrations to obtain the controllable-morphology hierarchical titanium dioxide nano-tube array consisting of anatase titanium dioxide single-crystal nano particles. The method is simple to operate and has low cost; and a hierarchical anatase titanium dioxide nano-structure with a titanium plate on the back and an ordered porous channel array on the front can be formed simply by performing hydro-thermal treatment on the amorphous anodic-oxidation titanium dioxide nano-tube array.

Description

technical field [0001] The invention belongs to the field of hydrothermal reaction method, and in particular relates to a method for preparing an ordered array of titanium dioxide graded nanotubes composed of anatase single crystal particles with controllable morphology. Background technique [0002] Titanium dioxide, as a well-known wide-bandgap semiconductor material, has received a lot of attention for many years. Titanium dioxide has three crystal forms: anatase, rutile, and brookite. Compared with the other two crystal forms, the anatase type, especially the anatase nanostructure, is more effective in photocatalysis, solar energy conversion, hydrogen production from water splitting, and chemical transmission. It has better photoelectric and photochemical properties in many practical applications such as sensing. At present, people can synthesize titanium dioxide nanostructures with various shapes including particles, wires, ribbons, tubes, and spheres by various means....

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/16C30B7/10C30B30/02C25D11/26
Inventor 章天赐胡小晔张立德
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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