Rare earth-doped BaTiO3 nanotube array photocatalyst and preparation method thereof

A nanotube array, rare earth doping technology, applied in the field of nanomaterial preparation and photocatalysis, can solve the problems of slow ion diffusion rate, hydrolysis and fracture of reactants, etc. The effect of improving separation efficiency

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

[0015] Soak the anodic alumina template with a pore size of 100nm in 5wt% phosphoric acid, remove the dense alumina barrier layer at the bottom, and obtain a double-pass porous alumina template; put the double-pass porous alumina template into the middle of the reactor, fix it, and place the reactor Separate into two parts to form a double-chamber reactor; add 0.1M Ti(OC 4 h 9 ) 4 and 0.01M silver nitrate solution; add 0.1M barium nitrate solution on the other side of the double-chamber reactor, then add 0.005M lanthanum nitrate solution, the pH value of the solutions on both sides is controlled at 3-6; Leave it for 4-10 hours; take out the template and dry it under the infrared lamp, raise the temperature in the muffle furnace to 750°C at a rate of 5°C per minute and keep it for 1 hour for annealing; use 2mol / L NaOH solution to remove the Lanthanum-doped barium titanate nanotube arrays were obtained after redundant alumina template.

Embodiment 2

[0017] Soak the anodic alumina template with a pore size of 100nm in 5wt% phosphoric acid, remove the dense alumina barrier layer at the bottom, and obtain a double-pass porous alumina template; put the double-pass porous alumina template into the middle of the reactor, fix it, and place the reactor Separate into two parts to form a double-chamber reactor; add 0.1M Ti(OC 4 h 9 ) 4 and 0.01M silver nitrate solution; add 0.1M barium nitrate solution on the other side of the double-chamber reactor, then add 0.005M cerium nitrate solution, the pH value of the solutions on both sides is controlled at 3-6; Set it aside for 4-10 hours; take out the template and dry it under an infrared lamp, then heat it in a muffle furnace at a rate of 5°C per minute to 750°C for 1 hour for annealing; use 2mol / L NaOH solution to remove the The redundant alumina template was used to obtain cerium-doped barium titanate nanotube arrays.

Embodiment 3

[0019] Soak the anodic alumina template with a pore size of 100nm in 5wt% phosphoric acid, remove the dense alumina barrier layer at the bottom, and obtain a double-pass porous alumina template; put the double-pass porous alumina template into the middle of the reactor, fix it, and place the reactor Separate into two parts to form a two-way reactor; add 0.1M Ti(OC 4 h 9 ) 4 and 0.01M silver nitrate solution; add 0.1M barium nitrate solution on the other side of the double-chamber reactor, add 0.005M praseodymium nitrate solution, the pH value of the solutions on both sides is controlled at 3-6; stand in the air 4-10 hours; after taking out the template, dry it under the infrared lamp, raise the temperature in the muffle furnace to 750°C at a rate of 5°C per minute and keep it for 1 hour for annealing; use 2mol / L NaOH solution to remove excess Praseodymium-doped barium titanate nanotube arrays were obtained after alumina template.

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Abstract

The invention discloses a rare earth-doped BaTiO3 nanotube array photocatalyst and a preparation method thereof. According to the method, a rare earth-doped BaTiO3 nanotube array is prepared from two-way porous anodic alumina as a template and silver nitrate as a Ti(OC4H9)4 stabilizer. The barium titanate nanotube array structure broadens the diffusion path of a charge carrier and reduces photo-generated electron and hole recombination. Through compounding of rare earth metal and barium titanate, the rare earth-doped BaTiO3 nanotube array heterogeneous photocatalytic material is constructed and the separation efficiency of photo-generated electrons and holes is improved.

Description

technical field [0001] The invention relates to a rare earth doped BaTiO 3 A nanotube array photocatalyst and a preparation method thereof belong to the technical field of nanomaterial preparation and the technical field of 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 requiremen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/10
CPCB01J23/10B01J35/004
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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