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Preparation method for strengthening responses of titanium dioxide nanotubes to visible light

A technology of titanium dioxide and nanotubes, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of few reports, no promotion value, expensive materials, etc., and achieve the convenience of operation process Effect

Inactive Publication Date: 2017-07-25
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Graphite, gold, silver and other substances have been used to modify TNA, but in related reports, the modification methods used are relatively cumbersome, and some materials used are also relatively expensive, which does not have good promotion value
[0006] The existence of defects in semiconductors can also promote the efficient separation of photogenerated electron-hole pairs, but there are few reports on this aspect

Method used

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  • Preparation method for strengthening responses of titanium dioxide nanotubes to visible light
  • Preparation method for strengthening responses of titanium dioxide nanotubes to visible light
  • Preparation method for strengthening responses of titanium dioxide nanotubes to visible light

Examples

Experimental program
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Effect test

Embodiment 1

[0032] The first step is to cut out a titanium piece with a size of 20mm×15mm×1mm and a purity of 99.99%. Polish the titanium sheet with 120#, 240#, 400#, 600#, 800#, 000#, 1200# waterproof sandpaper in sequence, ultrasonically clean it in deionized water and ethanol for 2 minutes, and then chemically clean it in 0.02M hydrogen fluoride aqueous solution Polishing for 30s.

[0033] The second step is the anodic oxidation of the second step voltage. The pretreated titanium sheet was used as the anode, and a stainless steel sheet with an area 10 times the area of ​​the titanium sheet was used as the cathode, which was put into the oxidizing solution for anodic oxidation, and the distance between the cathode and the anode was 5 cm.

[0034] The oxidation solution is a solution system in which ammonium fluoride is dissolved in glycerin and water, the mass percentage of ammonium fluoride is 0.5%, and the volume ratio of glycerin and water is 1:1.

[0035] The oxidation voltage is ...

Embodiment 2

[0039] The first step is to cut out a titanium piece with a size of 20mm×15mm×1mm and a purity of 99.99%. Polish the titanium sheet with 120#, 240#, 400#, 600#, 800#, 000#, 1200# waterproof sandpaper in sequence, ultrasonically clean it in deionized water and ethanol for 2 minutes, and then chemically clean it in 0.02M hydrogen fluoride aqueous solution. Polishing for 30s.

[0040] The second step is the anodic oxidation of the second step voltage. The pretreated titanium sheet was used as the anode, and a stainless steel sheet with an area 10 times the area of ​​the titanium sheet was used as the cathode, which was put into the oxidizing solution for anodic oxidation, and the distance between the cathode and the anode was 5 cm.

[0041] The oxidation solution is a solution system in which ammonium fluoride is dissolved in glycerin and water, the mass percentage of ammonium fluoride is 0.5%, and the volume ratio of glycerin and water is 1:1.

[0042] The oxidation voltage is...

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Abstract

The invention discloses a preparation method for strengthening responses of titanium dioxide nanotubes to visible light. The preparation method includes the following steps that a pure titanium sheet is taken to be polished and washed, and chemical polishing is carried out in a hydrogen fluoride solution; second-stage stair voltage anodic oxidation is carried out in an ammonium fluoride, glycerinum and aqueous solution system; and heat treatment is carried out in an air atmosphere. The preparation method is easy and convenient to operate, modification of titanium dioxide nanotube arrays is achieved by generating homogenesis defects, and the second type of doped matter does not need to be introduced. Responses of the titanium dioxide nanotube arrays obtained through the preparation method to the visible light are strengthened.

Description

technical field [0001] The invention relates to the field of material chemistry, in particular to the technical field of photoelectrochemistry and photocatalysis, and specifically relates to a preparation method for enhancing the response of titanium dioxide nanotubes to visible light. Background technique [0002] In 1972, Japan's Fujishima and Honda reported TiO in Nature magazine 2 The electrode can decompose water to produce hydrogen and oxygen under the irradiation of ultraviolet light, making TiO 2 As a light-induced catalytic material, it has entered the sight of researchers. with TiO 2 Photocatalytic oxidation technology as a catalyst has become a green and effective sewage treatment technology that has attracted much attention and developed rapidly in recent years. [0003] Currently, TiO 2 Catalyst research mainly focuses on powdered TiO 2 In the application of the suspension phase, one of the problems is that the suspension phase of TiO 2 It is difficult t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/26B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C25D11/26
Inventor 司玉军宋新建熊中平李敏娇
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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