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Preparation method of titanate nanotube codoped with ions of nitrogen and rare earth elements

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

Inactive Publication Date: 2013-06-05
HENAN NORMAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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) Prepare titanate nanotubes by a known hydrothermal method. 1.0 g TiO 2 Add it to 10 M NaOH aqueous solution, stir for 20 minutes, put it into a high-pressure reactor at 150-220 ° C for 24-36 h, take it out and wash it with deionized water until it is neutral, then immerse it in 0.1M HCl to acidify for 5-8 h, and then use it to Wash with ionic water until neutral. Dry at 80°C for 10 h and then grind to make titanate nanotubes.

[0007] (2) Take 1g of titanate nanotubes prepared above and put them into 4 + In a mixed solution of ions and rare earth element ions, NH 4 + The concentration ratio of ions and rare earth element ions is 1:1, and the total concentration of the two is 0.01M. Stir at room temperature for 24 h to reach ion exchange equilibrium, and then wash with deionized water and dry at 80°C for 10 hours.

[0008] (3) Calcining the doped titanate nanotubes at 300° C. in a calcination device to produce titanate nanotubes doped with nitrogen and rare ea...

Embodiment 2

[0010] (1) Prepare titanate nanotubes by a known hydrothermal method. 1.0 g TiO 2 Add it to 10 M NaOH aqueous solution, stir for 20 minutes, put it into a high-pressure reactor at 150-220 ° C for 24-36 h, take it out and wash it with deionized water until it is neutral, then immerse it in 0.1M HCl to acidify for 5-8 h, and then use it to Wash with ionic water until neutral. Dry at 80°C for 10 h and then grind to make titanate nanotubes.

[0011] (2) Take 1g of titanate nanotubes prepared above and put them into 4 + In a mixed solution of ions and rare earth element ions, NH 4 + The concentration ratio of ions and rare earth element ions is 1:2, and the total concentration of the two is 0.1 M. Stir at room temperature for 24 h to reach ion exchange equilibrium, and then wash with deionized water and dry at 80°C for 10 hours.

[0012] (3) Calcining the doped titanate nanotubes at 500° C. in a calcination device to produce titanate nanotubes doped with nitrogen and rare ea...

Embodiment 3

[0014] (1) Prepare titanate nanotubes by a known hydrothermal method. 1.0 g TiO 2 Add it to 10 M NaOH aqueous solution, stir for 20 minutes, put it into a high-pressure reactor at 150-220 ° C for 24-36 h, take it out and wash it with deionized water until it is neutral, then immerse it in 0.1M HCl to acidify for 5-8 h, and then use it to Wash with ionic water until neutral. Dry at 80°C for 10 h and then grind to make titanate nanotubes.

[0015] (2) Take 1g of titanate nanotubes prepared above and put them into 4 + In a mixed solution of ions and rare earth element ions, NH 4 + The concentration ratio of ions and rare earth element ions is 1:3, and the total concentration of the two is 0.5M. Stir at room temperature for 24 h to reach ion exchange equilibrium, then wash with deionized water and dry at 80°C for 10 hours.

[0016] (3) Calcining the doped titanate nanotubes at 800° C. in a calcination device to produce titanate nanotubes doped with nitrogen and rare earth e...

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PUM

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Abstract

The invention discloses a preparation method of a titanate nanotube codoped with ions of nitrogen and rare earth elements, relating to ion exchange doping. The invention aims at providing a preparation method of a titanate nanotube codoped with ions of nitrogen and rare earth elements, and the titanate nanotube obtained by the method has good visible light activity. The technical scheme of the invention is as follows: the preparation method of a titanate nanotube codoped with ions of nitrogen and rare earth elements comprises a titanate nanotube production method: (1) adding 1 part by mass oftitanate nanotubes to a mixed water solution containing NH4<+> ions and ions of rare earth elements, stirring at room temperature until ion exchange equilibrium, cleaning the titanate nanotubes with deionized water, drying and dewatering, wherein the concentration of the mixed water solution is 0.01-0.5M; and (2) calcining the dry doped titanate nanotubes in a calcining furnace at 300-800 DEG C to obtain the titanate nanotubes codoped with ions of nitrogen and rare earth elements. The method provided by the invention is used for doping the titanate nanotubes.

Description

Technical field: [0001] The invention relates to ion exchange doping, in particular to a method for preparing titanate nanotubes co-doped with nitrogen and rare earth element ions. Background technique: [0002] Hydrothermal method is the preparation of TiO 2 Common methods for nanotubes. TiO 2 Nanoparticles undergo a series of chemical reactions with concentrated alkali solution at high temperature, and then undergo pickling and calcination to obtain TiO 2 nanotube. The method is simple to operate and low in cost. 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 , Na 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. Invention content: [0003] The purpose of the present invention is to provide a method for preparing titanate nan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/00B82B3/00
Inventor 刘国光刘海津汪应灵吕文英谢友海
Owner HENAN NORMAL UNIV
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