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A kind of preparation method of barium titanate nanotube array

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

Active Publication Date: 2018-12-04
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] The anodic alumina template with a pore diameter of 100nm was soaked with 5wt% phosphoric acid to obtain a double-pass porous alumina template; the double-pass porous alumina template was placed in the middle of the reactor, fixed, and the reactor was separated into two parts to form a double chamber reactor. Add 0.01M barium nitrate solution on 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 stand in the air for 6 hours; take out the template, wipe the surface clean and dry it under an infrared lamp, in a muffle furnace at 5℃ The heating rate per minute was increased to 750°C for 1 hour; the excess AAO template in the product was removed with a 2mol / L NaOH solution to obtain a barium titanate nanotube array.

Embodiment 2

[0014] The anodic alumina template with a pore diameter of 100nm was soaked with 5wt% phosphoric acid to obtain a double-pass porous alumina template; the double-pass porous alumina template was placed in the middle of the reactor, fixed, and the reactor was separated into two parts to form a double chamber reactor. Add 0.01M barium nitrate solution on 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 stand in the air for 6 hours; take out the template, wipe the surface clean and dry it under an infrared lamp, in a muffle furnace at 5℃ The heating rate per minute is increased to 750°C for 1 hour for annealing treatment. A 2mol / L NaOH solution was used to remove the excess AAO template in the product to obtain a barium titanate nanotube array.

Embodiment 3

[0016] The anodic alumina template with a pore diameter of 100nm was soaked with 5wt% phosphoric acid to obtain a double-pass porous alumina template; the double-pass porous alumina template was placed in the middle of the reactor, fixed, and the reactor was separated into two parts to form a double chamber reactor. Add 0.01M barium nitrate solution on one side of the dual-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 stand in the air for 6 hours; take out the template, wipe the surface clean and dry it under an infrared lamp, in a muffle furnace at 5℃ The heating rate per minute is increased to 750°C for 1 hour for annealing treatment. After removing the excess AAO template in the product with a 2mol / L NaOH solution, the titanate nanotube array was obtained.

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Abstract

The invention discloses a method for preparing a barium titanate nanotube array. The method uses a double-pass porous anodic aluminum oxide template to prepare barium titanate nanotube arrays in a dual-chamber reactor. The present invention introduces silver nitrate as a stabilizer for Ti(OC4H9)4 during the reaction process, which delays the gelation time and obtains a long-term stable sol; at the same time, the diffusion coefficient and viscosity difference of cations in the aqueous solution are used to adjust the cation ratio to obtain the ideal Stoichiometric barium titanate nanotube array structure.

Description

Technical field [0001] The invention relates to a method for preparing a barium titanate nanotube array, belonging to the technical field of nano material preparation and the technical field of photocatalysis. Background technique [0002] Barium titanate is a typical perovskite type ferroelectric body, BaTiO 3 The application research of the company mainly focuses on the fields of transducers, sensitive components and capacitors. The preparation of barium titanate nanomaterials is mainly nanocrystals, in addition to barium titanate nanorods and films. In recent years, people have discovered that BaTiO 3 As a perovskite-type oxide, it is also a type of photocatalyst. It can also generate photo-generated electrons and photo-generated holes under ultraviolet or visible light irradiation, which makes it have a wide range of application prospects in the field of photocatalysis. Barium titanate is used in the field of photocatalysis. The application of it puts forward new requirement...

Claims

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Application Information

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Patent Type & Authority Patents(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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