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Method for preparing titanium dioxide nano-tube

A titanate nanotube and nanotube technology, which is applied in the field of photocatalysis and information, can solve the problems of tubular structure damage, low photocatalytic activity, and inability to perform high temperature treatment.

Inactive Publication Date: 2008-05-21
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the relatively thin wall of the nanotube, as the calcination temperature continues to rise, the titanate nanotube gradually loses structural water, and the interlayer spacing of the tube wall shrinks. Anatase TiO with better structure 2 Nanotubes, so their photocatalytic activity is low

Method used

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  • Method for preparing titanium dioxide nano-tube
  • Method for preparing titanium dioxide nano-tube
  • Method for preparing titanium dioxide nano-tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Preparation of titanate nanotubes

[0030] (1) Weigh anatase TiO 2 2g;

[0031] (2) Prepare 10mol / L NaOH 40ml;

[0032] (3) Prepare 0.1mol / L HCl;

[0033] (4) 2g TiO2 and the prepared NaOH solution are put into a polytetrafluoroethylene flask equipped with a condensing device;

[0034] (5) heating and stirring, controlling the reaction temperature to be about 100°C, and the reaction time is 12h;

[0035] (6) Cool to room temperature after completion of the reaction, and take out the white precipitate;

[0036] (7) Wash several times with deionized water until the conductivity of the supernatant is lower than 70us / cm;

[0037] (8) Wash the white precipitate with prepared 0.1mol / L HCl, and let it stand for 5h (hour);

[0038] (9) Wash several times with deionized water until the conductivity of the supernatant is lower than 5us / cm;

[0039] (10) Fresh titanate nanotubes are obtained, which is designated as sample A.

[0040] (2) Preparation of titanium dioxid...

Embodiment 2

[0063] (1) The method for preparing titanate nanotubes is the same as in Example 1.

[0064] (2) Preparation of titanium dioxide nanotubes

[0065] ① Prepare 0.01mol / L ammonium fluorotitanate [(NH 4 ) 2 TiF 6 ] solution and 0.03mol / L boric acid [H 3 BO 3 ] solution, stand-by after filtration;

[0066] ②Take an appropriate amount of fresh titanate nanotube A and completely immerse it in the filtered mixed solution of ammonium fluorotitanate and boric acid for deposition;

[0067] ③(NH 4 ) 2 TiF 6 A coordination exchange equilibrium reaction occurs in aqueous solution:

[0068] [ TiF 6 ] 2 - + n H 2 O ⇔ TiF 6 - n ( OH ) ...

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Abstract

The invention discloses a preparation method of TiO2 nanotubes, which comprises the following steps: an appropriate amount of sodium titanate nanotubes obtained by a hydrothermal synthesis method is dispensed to be fully dipped in mixed solution of ammonium fluorotitanate and boric acid with the filtered molar concentration ratio of 1:1-1:5 for deposition with the deposition time of 10-120mins; the mixed solution is reacted to obtain the sodium titanate nanotubes with TiO2 films formed which are then dried in an oven and next treated with heat treatment in a muffle furnace and cooled naturally so as to obtain the anatase type TiO2 nanotubes. The TiO2 nanotubes prepared by the method has anatase crystal form and relatively high catalytic activity, so the hydrogen yield of photocatalysis hydrogen production can be increased and the photoelectric transformation efficiency of dye-sensitized solar cells can be improved.

Description

technical field [0001] The invention relates to the fields of photocatalysis and information technology, in particular to a method for preparing titanium dioxide nanotubes. Background technique [0002] In 1996, Hoyer P successfully prepared titanium dioxide nanotubes by using a porous anodic alumina membrane template method; in 1998, Kasuga T et al. successfully prepared powdered "titanium dioxide" nanotubes by a simple hydrothermal synthesis method, and since then opened the "titania" nanotubes. The prelude to the study of titanium dioxide" nanotubes. At present, the preparation methods of titanium dioxide nanotubes are mainly template synthesis method and hydrothermal synthesis method, and electrochemical methods, redox methods, atomic deposition methods, etc. are also reported in the literature. [0003] TiO obtained by template method 2 Nanotubes have dense nanopores that are uniformly distributed, perpendicular to the membrane surface, and parallel to each other, and...

Claims

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Application Information

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IPC IPC(8): C01G23/053B01J21/06B82B3/00
Inventor 李新军张玉媛张开坚郑少健何明兴冯满枝黄琮
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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