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Method for preparing PbO2-modified TiO2 nanotube electrode

A technology of nanotubes and electrodes, applied in the field of preparing PbO2 modified TiO2 nanotube electrodes

Inactive Publication Date: 2015-05-20
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the TiO 2 Only one side of the nanotube electrode can receive light, and it only exerts the catalytic ability of one side of the electrode without increasing the light source.

Method used

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  • Method for preparing PbO2-modified TiO2 nanotube electrode
  • Method for preparing PbO2-modified TiO2 nanotube electrode
  • Method for preparing PbO2-modified TiO2 nanotube electrode

Examples

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Embodiment 1

[0023]Cut the pure titanium sheet into small pieces of 50 mm×60 mm, and then polish them with 600# and 1000# emery paper until no obvious scratches can be seen, then ultrasonically immerse and clean them in distilled water and acetone for 10 minutes, and finally put HF, concentrated HNO 3 , H 2 O Prepare a chemical polishing solution at a volume ratio of 1:4:5, and soak the cleaned titanium sheet in the polishing solution for 1 minute until no obvious bubbles are seen. Afterwards, it was washed with deionized water and dried in a vacuum oven for later use.

[0024] A stable voltage and current power supply with a range of 0-30V is used, the anode is made of titanium, the platinum mesh is used as the cathode, and the electrolyte is 0.5 wt% NH 4 F and 0.5 mol / L Na 2 SO 4 Aqueous solution, the pH value of the solution is NaOH and H 2 SO4 regulation. The anodizing voltage range is 20-25 V, the polarization time is 60-120 min, and it is carried out at room temperature under m...

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Abstract

The invention discloses a method for preparing a PbO2-modified TiO2 nanotube electrode. The method comprises the following steps of: (1) preparing a TiO2 nanotube electrode on a Ti substrate by adopting an anodic oxidation method; (2) depositing PbO2 on the other face of the TiO2 nanotube electrode by using an electrodeposition method at the external voltage of 1.5 V through taking a solution of Pb(NO3)2 and NaF as an electrolyte, wherein the pH value of the solution is 2, the concentration of the Pb(NO3)2 is 0.05 mol / L, and the concentration of the NaF is 0.001 mol / L; (3) naturally airing to obtain a PbO2-TiO2 nanotube / Ti / TiO2 nanotube bifunctional electrode; and (4) obtaining PbO2 bifunctional electrodes with different thicknesses and structures through controlling the current density and the time for deposition. According to the method, the backlight face of the TiO2 nanotube electrode is sufficiently utilized, and the photoelectrocatalytic oxidation capacity of the electrode can be remarkably improved through combining the photocatalysis with the electrocatalysis.

Description

technical field [0001] The present invention relates to a kind of preparation PbO 2 Modified TiO 2 Nanotube electrode method, in particular to a method for preparing PbO 2 -TiO 2 Nanotube / Ti / TiO 2 A method for nanotube bifunctional electrodes. Background technique [0002] Titanium dioxide (TiO 2 ) is an important inorganic semiconductor functional material, which has the characteristics of moisture sensitivity, gas sensitivity, dielectric effect, photoelectric conversion and superior photocatalytic performance. It is used in sensors, dielectric materials, self-cleaning materials, solar cells, photocatalytic degradation Pollutants and other high-tech fields have important application prospects, and have become one of the hot research topics at home and abroad. with general nano-TiO 2 powder compared to TiO 2 The special structure of nanotubes makes them have larger specific surface area and stronger adsorption capacity, which is expected to show better photocatalyti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D9/04C25D11/26C25B11/06
Inventor 申延明李飞李士凤刘东斌樊丽辉宁志高
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY