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Method for preparing Ti-Fe alloy oxide photonic crystal electrode with high periodicity

A photonic crystal and periodic technology, applied in the field of nanomaterials, can solve the problems of reducing the high specific surface area of ​​nanotubes, destroying the pipe structure, and uneven doping, etc., and achieve the effect of enhanced photocatalytic activity, strong visible light absorption, and easy requirements

Inactive Publication Date: 2015-09-02
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the past, more studies were made on the use of electrochemical deposition or dip coating to deposit Fe 2 o 3 modified to TiO 2 NT, but the product obtained is Fe 2 o 3 Particles of various sizes are dispersed in the tube or agglomerated at the nozzle, which will easily cause the nozzle to be blocked and destroy the TiO 2 The tube structure of NT and the artificially reduced high specific surface area of ​​nanotubes, and the problem of uneven doping

Method used

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  • Method for preparing Ti-Fe alloy oxide photonic crystal electrode with high periodicity
  • Method for preparing Ti-Fe alloy oxide photonic crystal electrode with high periodicity
  • Method for preparing Ti-Fe alloy oxide photonic crystal electrode with high periodicity

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Embodiment 1

[0024] Before anodizing, Ti6Fe (6 wt % Fe) was polished with 180 mesh, 320 mesh, 600 mesh and metallographic sandpaper in sequence to make the surface uniform and smooth as a mirror surface, and then ultrasonically cleaned in distilled water and acetone for 15 min each, Finally in N 2 Dry at room temperature under atmosphere. At room temperature, the pretreated titanium-iron alloy plate was used as the anode, and the Pt sheet was used as the counter electrode. 4 F and 2vol% H 2 The ethylene glycol solution of O was used as the electrolyte, and the distance between the electrodes was 1 cm. Under magnetic stirring, firstly, the titanium-iron alloy plate was anodized under 60V constant potential condition for 3h, and then the obtained nanotubes were ultrasonically removed in deionized water; then the same plate was anodized under 60V constant potential condition for 1h, using The same method was used to remove the obtained nanotube layer; finally, the same plate was anodized a...

Embodiment 2

[0027] The pretreatment of the titanium-iron alloy plate and the anodizing electrolyte are the same as in Example 1. The titanium-iron alloy plate was anodized at a constant potential of 60V for 3h, and then the obtained nanotubes were ultrasonically removed in deionized water, and then the same plate was anodized at a constant potential of 20V, 25V and 30V for 30min respectively. The treatment after anodization was the same as in Example 1, and Ti-Fe-O NTPC (cracked) was prepared.

Embodiment 3

[0029] The pretreatment of the titanium-iron alloy plate and the anodizing electrolyte are the same as in Example 1. The ferro-titanium alloy plates were anodized at constant potentials of 20V, 25V and 30V for 30min respectively. The treatment after anodization was the same as in Example 1, and Ti-Fe-O NTPC was prepared.

[0030] figure 2is the current density map of nanotube nanomaterials synthesized in Examples 1, 2 and 3 of the present invention, which shows that layered Ti-Fe-O NTPC electrodes have higher photocurrents compared to pure Ti-Fe-O NTs The dense, highly ordered nanonetwork can enhance the photoelectric response of the electrode by increasing the visible light absorption and the presence of the upper nanonetwork can also increase the specific surface area of ​​the electrode. Compared with the highly ordered Ti-Fe-O NTPC, the photocurrent density of Ti-Fe-O NTPC (cracked) under the same test conditions is lower, which may be due to its weaker visible light abs...

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Abstract

The invention relates to a method for preparing a three-dimensional layered Ti-Fe alloy oxide photonic crystal electrode (Ti-Fe-O NTPC) with a high periodicity. The photonic crystal electrode is prepared by using ferrotitanium as a substrate and using a three-step electrochemical anodizing method. Compared with a conventional nanotube structure and a layered titanium dioxide nanotube without doped ferrum, the Ti-Fe-O NTPC novel electrode has high-efficient visible photoelectrocatalysis performance because the Ti-Fe-O NTPC has a high-periodicity ordered nanometer net which can be used as photonic crystal layer to increase light absorption and the use of the alloy substrate guarantees uniform doping of Fe and Ti at an atom level so as to promote electron transmission. The electrode has potential application value in the field of photocatalysis, photoelectrocatalysis, and new energy preparation and analysis detection.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and relates to a preparation method of an electrode, in particular to a preparation method of a highly periodic Ti-Fe alloy oxide photonic crystal electrode (Ti-Fe-O NTPC). Background technique [0002] A photonic crystal is a regular photonic structure made of periodically arranged media with different refractive indices. This material can block photons of a specific frequency (usually photons in the visible region) due to its photonic band gap, thereby trapping them. At present, photonic crystals are widely used in reflective polarizing films, sensors, solar cells, etc., especially in the field of photoelectric catalysis due to their unique visible light absorption properties. Among various photonic crystal materials, the traditional photocatalytic material TiO 2 In particular, one-dimensional highly ordered titanium dioxide nanotubes (TiO 2 NT) has attracted extensive attention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/20H01G9/042
Inventor 赵国华黄雯娜张亚男张亚军
Owner TONGJI UNIV
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