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Method for doping titanium dioxide nanotube array

A nanotube array and titanium dioxide technology, applied in the field of doping, can solve the problems of unsatisfactory doping amount, low production efficiency, long soaking time, etc.

Inactive Publication Date: 2009-10-21
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The first two doping methods require expensive equipment, while the latter takes a longer soaking time, usually 1-2 days, with low production efficiency and unsatisfactory doping amount

Method used

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  • Method for doping titanium dioxide nanotube array

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Effect test

Embodiment 1

[0005] Embodiment 1. The method for preparing nitrogen-doped titania nanotube array

[0006] The titanium dioxide nanotube array to be doped is used as the cathode 3 and placed in the electrolytic cell 1, the anode 4 is a platinum electrode, the positive and negative electrodes of the DC power supply are respectively connected to the anode and the negative electrode in the electrolytic cell, and the power supply voltage is below 10V. 2 contains NH 4 + salt solution, NH 4 + The content of 0.1-0.2mol / L. After deposition for 1 hour, the titanium dioxide nanotube array is placed in a muffle furnace and calcined at 300-700° C. for 2-3 hours to form a nitrogen-doped titanium dioxide nanotube array.

[0007] The voltage has an effect on the size of the doping amount. Generally, the higher the voltage, the higher the doping amount. NH 4 + As the concentration increases, the doping amount will also increase, but the voltage value should not be greater than 10V, NH 4 + The con...

Embodiment 2

[0008] Example 2. Metal and nitrogen co-doping of titania nanotube arrays

[0009] The titanium dioxide nanotube array and platinum electrode made by anodic oxidation are placed in the electrolytic cell and connected to the negative and positive electrodes of the DC power supply respectively. The electrolyte contains transition metal ions or rare earth ions with a concentration of 0.1mol / L. also contains NH 4 + , the concentration is 0.1mol / L, the voltage is 1-10V, after 1 hour of electrodeposition, the titanium dioxide nanotube array is placed in a muffle furnace and calcined at 300-700°C for 2-3 hours to form metal and nitrogen Co-doped titania nanotube arrays.

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Abstract

The invention discloses a method for doping a titanium dioxide nanotube array and aims to provide a low-cost and high-doping-efficiency method for doping a titanium dioxide nanotube array. The method comprises the following steps: placing the titanium dioxide nanotube array to be doped and a platinum electrode in an electrolysis bath; and connecting the positive pole and the negative pole of a direct current power supply and the platinum electrode and the titanium dioxide nanotube array to be doped respectively, wherein the voltage of the direct current is no more than 10 V and the electrolyte is a salt solution containing NH4 or a mixed salt solution containing metal ions and NH4. Compared with the prior art, the method has the obvious advantages of low implement cost, convenient operation, high doping efficiency, and the like. The method is suitable for doping nanotubes.

Description

Technical field: [0001] The invention relates to a doping technology, in particular to a method for doping titanium dioxide nanotube arrays. Background technique: [0002] In order to improve the optoelectronic properties of titanium dioxide nanotube arrays, doping methods are often used, such as metal doping, non-metal doping or co-doping of metal and non-metal on the nanotube arrays. Currently known doping methods include ion implantation, chemical vapor deposition, and immersion in solution followed by calcination. The first two doping methods require expensive equipment, while the latter requires a longer soaking time, usually 1-2 days, and the production efficiency is low, and the doping amount is not ideal. Invention content: [0003] The purpose of the present invention is to provide a method for doping titanium dioxide nanotube arrays with low cost and high doping efficiency. The technical solution of the present invention is a method for doping a titanium dioxid...

Claims

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Application Information

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IPC IPC(8): H01L31/18C30B31/00C30B29/16
CPCY02P70/50
Inventor 刘国光刘海津
Owner HENAN NORMAL UNIV
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