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Process for preparing cationic nanotube array intermingling titanium oxide

A technology of titanium oxide nanotubes and cations, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve problems such as difficult uniform doping, and achieve easy recovery and high-efficiency in-situ cation doping , evenly distributed effect

Inactive Publication Date: 2008-06-25
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing cation-doped titanium oxide nanotube arrays, obtain doped titanium oxide nanotubes on the atomic scale, greatly improve the utilization efficiency of sunlight, and solve the existing problem of preparing cation-doped titanium oxide nanotube arrays. Difficulty in Uniform Doping of Titanium Nanotubes

Method used

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  • Process for preparing cationic nanotube array intermingling titanium oxide
  • Process for preparing cationic nanotube array intermingling titanium oxide
  • Process for preparing cationic nanotube array intermingling titanium oxide

Examples

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Effect test

Embodiment 1

[0026] The prepared titanium-bismuth alloy was cut into thin slices of 20mm×8mm×0.5mm, and titanium oxide nanotubes were grown on the titanium-bismuth alloy substrate by anodic oxidation process, and the molar content of the alloying element bismuth was 3%. The alloy titanium sheet is heat-treated in a nitrogen atmosphere of 2000Pa, the treatment temperature is 1200°C, and the holding time is 30h, until the residual stress in the alloy titanium sheet is eliminated, and the treated titanium sheet is cleaned in cleaning solvent ethanol and dried. The platinum sheet is used as the cathode, the titanium-bismuth alloy is used as the anode, and the electrolyte is 1M Na 2 SO 4 solution, wherein a certain amount of NaF is added, and the weight concentration of NaF is 1.2%. Apply an external voltage of 20V and oxidize at room temperature for 8 hours until the electrolyte turns milky white. Wash the prepared titanium oxide nanotubes with deionized water. At this time, they are amorphou...

Embodiment 2

[0029] The prepared titanium-zirconium alloy was cut into thin slices of 20mm×8mm×0.5mm, and titanium oxide nanotubes were grown on the titanium-zirconium alloy substrate by anodic oxidation process, and the molar content of alloy element zirconium was 6%. The titanium alloy sheet is heat treated in a nitrogen atmosphere of 4000Pa, the treatment temperature is 1250°C, and the holding time is 36h, until the residual stress in the titanium-zirconium alloy sheet is eliminated, and the treated titanium sheet is washed in cleaning solvent water and dried. The platinum sheet is used as the cathode, the titanium-zirconium alloy is used as the anode, and the electrolyte is 1M Na 2 SO 4 solution, wherein a certain amount of NaF is added, and the weight concentration of NaF is 2%. After applying an external voltage of 25V and oxidizing at room temperature for 5 hours, until the electrolyte turns milky white, the prepared titanium oxide nanotubes are washed with deionized water, and at ...

Embodiment 3

[0032]The prepared titanium-aluminum alloy was cut into thin slices of 20mm×8mm×0.5mm, and titanium oxide nanotubes were grown on the titanium-aluminum alloy substrate by anodic oxidation process, and the molar content of alloying element aluminum was 6%. The alloy titanium sheet is heat-treated in a nitrogen atmosphere of 10000Pa, the treatment temperature is 1000°C, and the holding time is 24h, until the residual stress in the titanium-aluminum matrix is ​​eliminated, and the treated titanium sheet is washed in cleaning solvent water and dried. The platinum sheet is used as the cathode, the titanium aluminum alloy is used as the anode, and the electrolyte is 1M Na 2 SO 4 solution, wherein a certain amount of NaF is added, and the weight concentration of NaF is 1%. After applying an external voltage of 20V and oxidizing at room temperature for 8 hours until the electrolyte turns milky white, the prepared titanium oxide nanotubes are washed with deionized water, and at this t...

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Abstract

The invention relates to a preparation technique of cation-doped titanium oxide nanotube arrays, in particular to a method of acquiring cation-doped titanium oxide nanotube arrays that have high photo-catalytic activity in situ on a titanium alloy matrix through electrochemistry and anodic oxidation process, and doped titanium oxide nanotube on atomic scale is acquired. Titanium alloy with homogeneous component is obtained by melting process, and the titanium alloy is adopted as matrix for anodic oxidation, so as to acquire titanium oxide nanotube arrays that are evenly doped with one kind or a plurality kinds of cations; by controlling content of alloying elements, titanium oxide nanotube with controllable doping amount and doped atomic scale can be acquired, and the diameter of electronic structure of the titanium oxide nanotube can be regulated, thus further improving solar rays performance of the titanium oxide nanotube in photocatalysis, and the titanium oxide nanotube arrays can hopefully be applied in hydrogen production from water by photodecomposition.

Description

technical field [0001] The present invention relates to the preparation technology of cation-doped titanium oxide nanotube arrays, specifically a method for in-situ obtaining cation-doped titanium oxide nanotube arrays with high photocatalytic activity on a titanium alloy substrate through an electrochemical anodic oxidation process . Background technique [0002] Photocatalytic materials have extremely important applications in the fields of degrading harmful and toxic organic substances, producing hydrogen by photolysis of water, and solar cells. photocatalytic material. Nano-titanium oxide is a wide-bandgap semiconductor. It has many advantages such as high efficiency, photostability, environmental friendliness, and low cost. It has become one of the most promising and promising photocatalysts in the field of photocatalysis. There are two main requirements for improving the efficiency of sunlight: one is to improve the conversion efficiency within the original absorptio...

Claims

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Application Information

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IPC IPC(8): B01J21/06C25D11/26
Inventor 成会明刘岗李峰刘敏逯高清
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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