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Method for preparing barium titanate nanotube array

A nanotube array and barium titanate technology, which is applied in the field of photocatalysis and nanomaterial preparation, can solve the problems of template deformation, slow ion diffusion rate, fracture, etc., and achieve the effect of preventing collapse and delaying gelation time

Active Publication Date: 2017-02-15
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The anodized aluminum template method is a common method for preparing nanotube arrays, but this method is subject to the confinement of the template, the ion diffusion rate in the template channel is slow, the path is long, and the reaction time is long. If the reaction time is too long, it will easily lead to deformation of the template. fragmentation, hydrolysis of reactants

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Soak the anodized alumina template with a pore size of 100nm in 5wt% phosphoric acid to obtain a double-pass porous alumina template; put the double-pass porous alumina template into the middle of the reactor, fix it, and isolate the reactor into two parts to form a double chamber reactor. Add 0.01M barium nitrate solution to one side of the double-chamber reactor; add 0.012M Ti(OC 4 h 9 ) 4 and 1.2×10 -3 M silver nitrate solution; the pH value of the solutions on both sides is controlled at 4-6; let it stand in the air for 6 hours; take out the template, wipe the surface clean and dry it under an infrared lamp at 5°C in a muffle furnace The heating rate per minute was increased to 750° C. for 1 hour; the excess AAO template in the product was removed with 2 mol / L NaOH solution to obtain a barium titanate nanotube array.

Embodiment 2

[0014] Soak the anodized alumina template with a pore size of 100nm in 5wt% phosphoric acid to obtain a double-pass porous alumina template; put the double-pass porous alumina template into the middle of the reactor, fix it, and isolate the reactor into two parts to form a double chamber reactor. Add 0.01M barium nitrate solution to one side of the double-chamber reactor; add 0.014M Ti(OC 4 h 9 ) 4 and 1.4×10 -3 M silver nitrate solution; the pH value of the solutions on both sides is controlled at 4-6; let it stand in the air for 6 hours; take out the template, wipe the surface clean and dry it under an infrared lamp at 5°C in a muffle furnace The heating rate per minute was increased to 750° C. for 1 hour for annealing. The barium titanate nanotube array was obtained after removing excess AAO template in the product with 2mol / L NaOH solution.

Embodiment 3

[0016] Soak the anodized alumina template with a pore size of 100nm in 5wt% phosphoric acid to obtain a double-pass porous alumina template; put the double-pass porous alumina template into the middle of the reactor, fix it, and isolate the reactor into two parts to form a double chamber reactor. Add 0.01M barium nitrate solution to one side of the double-chamber reactor; add 0.016M Ti(OC 4 h 9 ) 4 and 1.6×10 -3 M silver nitrate solution; the pH value of the solutions on both sides is controlled at 4-6; let it stand in the air for 6 hours; take out the template, wipe the surface clean and dry it under an infrared lamp at 5°C in a muffle furnace The heating rate per minute was increased to 750° C. for 1 hour for annealing. The titanate nanotube array was obtained after removing excess AAO template in the product with 2mol / L NaOH solution.

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Abstract

The invention discloses a method for preparing a barium titanate nanotube array. According to the method, the barium titanate nanotube array is prepared through a two-way porous anodised aluminum template in a double-chamber reactor. Through use of silver nitrate as a Ti(OC4H9)4 stabilizer in the reaction process, gelation time is prolonged and soil with long-term stability is obtained. According to a diffusion coefficient and viscosity difference of cations in a water solution, a cationic ratio is adjusted and the barium titanate nanotube array structure with an ideal stoichiometric ratio is obtained.

Description

technical field [0001] The invention relates to a method for preparing a barium titanate nanotube array, which belongs to the technical field of nanomaterial preparation and photocatalysis. Background technique [0002] Barium titanate is a typical perovskite ferroelectric, BaTiO 3 The applied research mainly focuses on the fields of transducers, sensitive components and capacitors. The preparation of barium titanate nanomaterials is mainly nanocrystals, as well as barium titanate nanorods and thin films. In recent years, it has been discovered that BaTiO 3 As a perovskite oxide is also a kind of photocatalyst, it can also generate photogenerated electrons and photogenerated holes under the irradiation of ultraviolet light or visible light, which makes it have a wide application prospect in the field of photocatalysis. Barium titanate is used in the field of photocatalysis The application of it puts forward new requirements for its morphology. The nanotube array structur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/02
CPCB01J23/02B01J35/39
Inventor 陈智慧李志伟杨亚邱建华丁建宁袁宁一
Owner CHANGZHOU UNIV
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