Preparation method of zinc-doped titanium dioxide nano-tube array

A nanotube array, titanium dioxide technology, used in electrolytic coatings, surface reaction electrolytic coatings, coatings, etc., can solve the problems of reducing electrolyte concentration, lack of universality, and difficulty in ions entering, achieving high quantum effect, combined with Firm, evenly distributed effect

Inactive Publication Date: 2012-06-06
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In these methods, the electrolyte modification method changes the charge migration speed in the electrolyte due to the addition of metal ions, which increases the current, and some ions and F - A complex reaction occurs, reducing the F in the electrolyte - concentration, which is not conducive to the reaction, so it is not universal; in the impregnation modification, the main driving force of ion implantation is capillary action, this method takes a long time, and the ions are not easy to enter the titanium dioxide nanotubes

Method used

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  • Preparation method of zinc-doped titanium dioxide nano-tube array
  • Preparation method of zinc-doped titanium dioxide nano-tube array

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Polish the pure titanium foil until there is no scratch on the surface, clean it and set aside;

[0023] (2) prepare electrolyte: electrolyte is the mixed solution that is the hydrofluoric acid of 40wt% and deionized water preparation by HF content, and the content of HF is 0.3wt% in the electrolyte;

[0024] (3) Under 20V DC voltage, with pure titanium foil as the anode and platinum sheet as the cathode, keeping the distance between the two electrodes at 30mm, anodic oxidation is carried out in the electrolyte, and the oxidation time is 4h, and the amorphous titanium dioxide nanotube array is prepared ;

[0025] (4) Preparation of zinc-doped titania nanotube arrays: use the titania nanotube arrays prepared above as cathode, platinum sheet as anode, and 0.1mol / L Zn(NO 3 ) 2 The solution is an electrolyte, and the electrochemical deposition is carried out at a DC voltage of 0.4V for 60 minutes;

[0026] (5) Put the electrochemically deposited titanium dioxide nano...

Embodiment 2

[0028] (1) Polish the pure titanium foil until there is no scratch on the surface, clean it and set aside;

[0029] (2) prepare electrolyte: electrolyte is the mixed solution that is the hydrofluoric acid of 40wt% and deionized water preparation by HF content, and the content of HF is 0.5wt% in the electrolyte;

[0030] (3) Under 30V DC voltage, using pure titanium foil as the anode and platinum sheet as the cathode, keeping the distance between the two electrodes at 40mm, anodizing in the electrolyte, the oxidation time is 3h, and the amorphous titanium dioxide nanotube array is prepared ;

[0031] (4) Preparation of zinc-doped titania nanotube array: use the titania nanotube array prepared above as cathode, platinum sheet as anode, and 0.2mol / L Zn(NO 3 ) 2 The solution is an electrolyte, and electrochemical deposition is carried out at a DC voltage of 0.6V for 30 minutes;

[0032] (5) Put the electrochemically deposited titanium dioxide nanotube array into a muffle furnac...

Embodiment 3

[0034] (1) Polish the pure titanium foil until there is no scratch on the surface, clean it and set aside;

[0035] (2) prepare electrolyte: electrolyte is the mixed solution that is the hydrofluoric acid of 40wt% and deionized water preparation by HF content, and the content of HF is 0.7wt% in the electrolyte;

[0036] (3) Under 40V DC voltage, with pure titanium foil as the anode and platinum sheet as the cathode, keeping the distance between the two electrodes at 50 mm, anodic oxidation is carried out in the electrolyte, and the oxidation time is 2 hours, and the amorphous titanium dioxide nanotube array is prepared ;

[0037] (4) Preparation of zinc-doped titania nanotube array: use the titania nanotube array prepared above as cathode, platinum sheet as anode, and 0.3mol / L Zn(NO 3 ) 2 The solution is an electrolyte, and the electrochemical deposition is carried out at a DC voltage of 0.5V for 60 minutes;

[0038] (5) Put the electrochemically deposited titanium dioxide ...

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Abstract

The invention belongs to the technical field of photoelectric materials and specially, relates to a preparation method of a zinc-doped titanium dioxide nano-tube array. The preparation method comprises the following steps that 1, an electrolyte of a HF aqueous solution having HF content of 0.3 to 1.0 wt%, an anode of pure titanium foil subjected to surface pretreatment and a cathode of a Pt sheet undergo an electrochemical anodization reaction under direct voltage of 10 to 50V to produce a titanium dioxide nano-tube array; and the titanium dioxide nano-tube array as a cathode, an anode of a platinum sheet and an electrolyte of a Zn(NO3) solution having concentration of 0.1 to 0.5mol/L undergo an electrochemical deposition reaction under direct voltage of 0.3 to 1.0V so that zinc is added into titanium dioxide nano-tube layers and the zinc-doped titanium dioxide nano-tube array is obtained. The preparation method provided by the invention has the advantages that ion implantation time is short; and doped ions Zn<2+> can enter into a titanium dioxide nano-tube under a electric field force and capillary action so that the zinc-doped titanium dioxide nano-tube array having good photoelectric properties and a light absorption range widen to a visible light range is prepared.

Description

technical field [0001] The invention belongs to the technical field of optoelectronic materials, and in particular relates to a method for preparing a zinc-doped titanium dioxide nanotube array by using an anodic oxidation method, in particular to a zinc-doped titanium dioxide nanotube array with good photoelectric performance prepared by a subsequent electrochemical deposition method. Tube array method. Background technique [0002] Titanium dioxide is an important inorganic functional material. It has broad application prospects in the storage and utilization of solar energy, photoelectric conversion, photochromism and photocatalytic degradation of pollutants in the atmosphere and water, because of its rich raw material resources and low price. , and non-toxic, it is a research hotspot in the world in recent years. Titanium dioxide mainly has three crystal forms: anatase, rutile and unstable brookite. Due to different crystal forms, the band gap of titanium dioxide is dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/26C25D3/22C25D7/04
Inventor 周艺朱志平吕彩霞
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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