Preparation method of BiFeO3 nano particle compounded TiO2 nanotube array electrode material

A nanotube array and nanoparticle technology is applied in the field of environmental pollution control to achieve the effects of flexible method, improved photoactivity and easy operation.

Inactive Publication Date: 2014-07-09
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, currently for composite BiFeO 3 and TiO 2 Nanotubes have not been reported at home and abroad, especially modified TiO 2 Ultrasonic impregnation deposition method used in nanotube arrays is rarely reported

Method used

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  • Preparation method of BiFeO3 nano particle compounded TiO2 nanotube array electrode material
  • Preparation method of BiFeO3 nano particle compounded TiO2 nanotube array electrode material
  • Preparation method of BiFeO3 nano particle compounded TiO2 nanotube array electrode material

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Embodiment 1

[0024] TiO was first prepared by anodic oxidation 2 Nanotube array electrode: After grinding the industrial pure titanium sheet with emery paper of different specifications, use HF / HNO 3 / H 2 The mixed acid solution with O volume ratio of 1:4:5 was etched for 30 s, and after ultrasonic cleaning, it was air-dried for later use. Connect the spare titanium and platinum electrodes to the positive and negative poles of the DC stabilized power supply respectively. The electrolyte is HF solution with a mass fraction of 0.2%, the applied voltage is 20V, and the reaction time is 1h. After the reaction, the electrode was cleaned, air-dried, and placed in a muffle furnace for annealing and calcination. The temperature was raised to 500°C at a heating rate of 2°C / min, calcined at a constant temperature for 1h, and naturally cooled to room temperature to obtain TiO 2 Nanotube array electrodes; BiFeO was then fabricated 3 Precursor, weigh 0.97gBi(NO 3 ) 3 ·5H 2 O and 0.80gFe(NO 3 ) ...

Embodiment 2

[0026] According to the method of the present invention in embodiment 1, anodic oxidation prepares TiO 2 The concentration of HF in the electrolyte was increased from 0.2% to 0.3% when the nanotube array electrode was used, and the amount of other raw materials and experimental procedures remained unchanged. BiFeO 3 / TiO 2 Nanotube array composite electrodes.

Embodiment 3

[0028] According to the method of the present invention in embodiment 1, anodic oxidation prepares TiO 2 The concentration of HF in the electrolyte was increased from 0.2% to 0.4% when the nanotube array electrode was used, and the amount of other raw materials and experimental procedures remained unchanged. BiFeO 3 / TiO 2 Nanotube array composite electrodes.

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Abstract

The invention relates to a preparation method of a BiFeO3 nano particle compounded TiO2 nanotube array electrode material, and belongs to the field of material preparation technologies. The preparation method comprises the following steps: firstly, preparing a TiO2 nanotube array electrode; then, preparing a BiFeO3 precursor; and finally, preparing the BiFeO3 / TiO2 nanotube compound electrode by an ultrasonic impregnation method. The electrode consists of TiO2 nanotube arrays which are ranked neatly in order, and the tube has the length of 400nm around, and has the diameter of 100nm around; BiFeO3 nano particles are uniformly distributed above the TiO2 nanotube as well as around the tube wall, partially permeate into the tube, are regular in morphology, are distinct in profile, and are dispersed uniformly. According to the invention, raw materials are low in price and can be obtained easily; the operation is simple and easy, and is easy to control; the equipment requirement is low, and the preparation method is environmentally friendly; the prepared BiFeO3 / TiO2 nanotube compound electrode can adjust the ultraviolet light catalysis of the TiO2 nanotube to be visible light catalysis.

Description

technical field [0001] The invention relates to a method for an inorganic ferroelectric semiconductor composite titanium dioxide nanotube electrode, in particular to a method for preparing a bismuth ferrite nanoparticle composite titanium dioxide nanotube electrode photocatalytic material, which belongs to the technical field of environmental pollution control. Background technique [0002] TiO 2 As a typical traditional photocatalyst, it is a wide bandgap semiconductor. with other forms of TiO 2 Materials compared to highly ordered TiO prepared by anodic oxidation 2 The nanotube array has larger specific surface area, higher adsorption capacity and more effective inner surface structure, which improves the photocatalytic performance and photoelectric conversion efficiency of TiO2. But TiO 2 It can only absorb ultraviolet light with a wavelength less than or equal to 387.5nm, and has almost no response to the visible light part of the solar spectrum that occupies 45% of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/843B01J37/02B01J37/34
Inventor 肇启东朱阿姝李新勇石勇
Owner DALIAN UNIV OF TECH
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