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Method for preparing rare-earth ion doped titanate nanotube

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

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 , 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

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) Put 1 g of titanate nanotubes prepared above into a solution containing rare earth element ions that need to be doped, the solution concentration is 0.01 M, stir at room temperature for 24 h to reach ion exchange equilibrium, and then wash with deionized water Then dry at 80°C for 10 hours.

[0008] (3) Calcining the doped nanotubes at 300°C.

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) Put 1 g of titanate nanotubes prepared above into a solution containing rare earth element ions that need to be doped, the solution concentration is 0.1 M, stir at room temperature for 24 h to reach ion exchange equilibrium, and then wash with deionized water Then dry at 80°C for 10 hours.

[0012] (3) Calcining the doped nanotubes at 500°C.

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 1 g of the above-prepared titanate nanotubes and put them into a solution containing rare earth element ions that need to be doped. Then dry at 80°C for 10 hours.

[0016] (3) Calcining the doped nanotubes at 800°C.

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PUM

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Abstract

The invention discloses a method for preparing a rare-earth ion doped titanate nanotube, relating to doping through ion exchange. The titanate nanotube 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 into rare-earth ion aqueous solution, stirring the mixture at room temperature until ion exchange equilibrium is achieved, then washing the mixture with deionized water and drying the mixture to remove the moisture, wherein the concentration of the rare-earth aqueous solution is 0.01-0.5M; and (2) calcining the doped titanate nanotube prepared in the step (1) at 300-1000 DEG C to prepare the rare-earth ion doped titanate nanotube. The method is used for doping the titanate nanotube.

Description

Technical field: [0001] The invention relates to ion exchange doping, in particular to a method for preparing rare earth element ion doped titanate nanotubes. 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 preparation method of rare earth element ion-doped titan...

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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