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Method for preparing nitrogen doped titanate nanotube

A technology of titanate nanotubes and nitrogen elements, applied in the field of ion exchange doping, can solve the problems of unsatisfactory visible light activity of titanate nanotubes

Inactive Publication Date: 2011-04-27
HENAN NORMAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is generally believed that the nanotubes prepared by the hydrothermal method can actually be called titanic acid or titanate nanotubes, and their composition is H 2 Ti 3 o 7 , N a x h 2-x Ti 3 o 7 , H 2 Ti 5 o 11 ·H 2 O or H 2 Ti 4 o 9 ·H 2 O, but the visible light activity of this titanate nanotube is not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0006] (1) Use the following well-known hydrothermal method to prepare titanate nanotubes, 1.0 g TiO 2 Add 10 M NaOH aqueous solution, stir for 20 minutes, put it in an autoclave at 150-220 ℃ to react for 24-36 h, take it out and wash it with deionized water to neutrality, then immerse it in 0.1M HCl to acidify it for 5-8 h, then use it to remove Wash with ionized water to neutral. After drying at 80°C for 10 hours and grinding, the titanate nanotubes are produced.

[0007] (2) Take 1g of the titanic acid nanotubes prepared above and put it into containing NH 4 + In the aqueous solution of ions, the concentration of the solution is 0.01M, stirred at room temperature for 24 hours to reach ion exchange equilibrium, then washed with deionized water and dried at 80°C for 10 hours.

[0008] (3) The doped nanotubes are calcined at a high temperature of 300 ℃.

Embodiment 2

[0010] (1) Use the following well-known hydrothermal method to prepare titanate nanotubes, 1.0 g TiO 2 Add 10 M NaOH aqueous solution, stir for 20 minutes, put it in an autoclave at 150-220 ℃ to react for 24-36 h, take it out and wash it with deionized water to neutrality, then immerse it in 0.1M HCl to acidify it for 5-8 h, then use it to remove Wash with ionized water to neutral. After drying at 80°C for 10 hours and grinding, the titanate nanotubes are produced.

[0011] (2) Take 1g of the titanic acid nanotubes prepared above and put it into containing NH 4 + In the aqueous solution of ions, the concentration of the solution is 0.1M, stirred at room temperature for 24 hours to reach ion exchange equilibrium, then washed with deionized water and dried at 80°C for 10 hours.

[0012] (3) The doped nanotubes are calcined at a high temperature of 500 ℃.

Embodiment 3

[0014] (1) Use the following well-known hydrothermal method to prepare titanate nanotubes, 1.0 g TiO 2 Add 10 M NaOH aqueous solution, stir for 20 minutes, put it in an autoclave at 150-220 ℃ to react for 24-36 h, take it out and wash it with deionized water to neutrality, then immerse it in 0.1M HCl to acidify it for 5-8 h, then use it to remove Wash with ionized water to neutral. After drying at 80°C for 10 hours and grinding, the titanate nanotubes are produced.

[0015] (2) Take 1g of the titanic acid nanotubes prepared above and put it into containing NH 4 + In the aqueous solution of ions, the concentration of the solution is 0.5M, stirred at room temperature for 24 hours to reach ion exchange equilibrium, then washed with deionized water and dried at 80°C for 10 hours.

[0016] (3) The doped nanotubes are calcined at a high temperature of 800 ℃.

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Abstract

The invention discloses a method for preparing a nitrogen doped titanate nanotube, relating to doping through ion exchange. The titanate nanotube prepared by the method has high visible light activity. The technical scheme is as follows: the method comprises a method for preparing the titanate nanotube by a hydrothermal method and is characterized by (1) putting 1 part by weight of titanate nanotube prepared by the hydrothermal method into NH4<+> ion-containing aqueous solution with concentration of 0.01-0.5M, stirring the mixture at room temperature to react until ion exchange equilibrium is achieved, washing the reactant with deionized water and then putting the reactant into a drying oven to remove the moisture at 80 DEG C; and (2) calcining the dried product in a calcining furnace at 300-800 DEG C, thus preparing the nitrogen doped titanate nanotube. The method is used for doping the titanate nanotube.

Description

Technical field: [0001] The invention relates to an ion exchange doping, in particular to a preparation method of nitrogen element doped titanate nanotubes. Background technique: [0002] Hydrothermal method is to prepare TiO 2 Common methods of nanotubes. TiO 2 Nanoparticles undergo a series of chemical reactions with concentrated alkali solutions at high temperatures, and then undergo pickling and calcination to produce TiO 2 nanotube. The method is simple in operation and low in cost. It is generally believed that nanotubes prepared by hydrothermal method can actually be called titanic acid or titanate nanotubes, and their composition is H 2 Ti 3 O 7 , N a x H 2-x Ti 3 O 7 , H 2 Ti 5 O 11 ·H 2 O or H 2 Ti 4 O 9 ·H 2 O, but the visible light activity of this titanate nanotube is not ideal. Summary of the invention: [0003] The purpose of the present invention is to provide a method for preparing nitrogen-doped titanate nanotubes, and the titanate nanotubes prepa...

Claims

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Application Information

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IPC IPC(8): C01G23/00B82Y40/00
Inventor 刘国光刘海津谢友海吕文英汪应灵
Owner HENAN NORMAL UNIV
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