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Titanium dioxide nano tube electrode and its preparation process and application

A titanium dioxide and nanotube technology, applied in the field of environmental pollution control, can solve the problems of unsuitable electrodes, cracks, low activity, etc., and achieve the effects of improving quantum efficiency, strong adsorption capacity, and large specific surface area

Inactive Publication Date: 2005-03-23
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen that this method has the following disadvantages: ① the process is complicated, ② the prepared titanium dioxide nanotubes exist in the form of powder, and cannot be used as electrodes
The process has the following problems: ① Since the prepared titania nanotube electrode has not been truly integrated, the stability is poor, and the titania nanotube is easy to peel off or crack from the substrate, so it is not suitable for use as an electrode in a photoelectrocatalytic reaction; ②The arrangement of titanium dioxide nanotubes on the electrode is disordered and disordered, and the activity is low; ③The process is complex

Method used

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  • Titanium dioxide nano tube electrode and its preparation process and application

Examples

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Effect test

Embodiment 1

[0030] A titanium dioxide nanotube electrode with a size of 25 mm×25 mm and a titanium dioxide nanotube integrated with a substrate is prepared by using a pure titanium sheet.

[0031] The first step, the preparation of the substrate

[0032]Cut the pure titanium sheet into 25mm×25mm, polish it on the polishing cloth with 360#, 800# and 1500# carborundum paper successively, clean it with deionized water, and put it in the volume ratio of hydrofluoric acid: nitric acid: deionized water=1 : Etched in a 4:5 mixed solution, washed with acetone and deionized water respectively, dried in an oven at 100°C, cooled to room temperature, and set aside;

[0033] The second step, the preparation of titania nanotube electrode

[0034] The treated pure titanium sheet is used as the anode, the platinum sheet is used as the cathode, placed in the reactor and the distance between the two electrodes is kept at 10mm, 0.01wt% hydrofluoric acid is put in the plexiglass reactor, and the copper wire...

Embodiment 2

[0039] A titanium dioxide nanotube electrode in which 50mm×50mm titanium dioxide nanotubes are integrated with a substrate is prepared by using a pure titanium sheet.

[0040] The first step, the preparation of the substrate

[0041] Cut the pure titanium sheet into 50mm×50mm, successively grind and polish on the polishing cloth with 360#, 800# and 1500# emery paper, clean with deionized water, and insert the volume ratio of hydrofluoric acid: nitric acid: deionized water=1 : Etched in a 4:5 mixed solution, washed once with acetone and deionized water respectively, dried in an oven at 105°C, cooled to room temperature, and set aside;

[0042] The second step, the preparation of titania nanotube electrode

[0043] The treated pure titanium sheet is used as the anode, the platinum sheet is used as the cathode, placed in the reactor and the distance between the two electrodes is kept at 30mm, 0.2wt% hydrofluoric acid is put in the plexiglass reactor, and the copper wire is used ...

Embodiment 3

[0048] A titanium dioxide nanotube electrode with a size of 100 mm×100 mm and a titanium dioxide nanotube integrated with a substrate is prepared by using a titanium alloy sheet.

[0049] The first step, the preparation of the substrate

[0050] Cut the titanium alloy sheet into 100mm×100mm, polish it on the polishing cloth with 360#, 800# and 1500# emery paper successively, clean it with deionized water, and put it in the volume ratio of hydrofluoric acid: nitric acid: deionized water=1 :4:5 mixed solution, and then washed once with acetone and deionized water respectively, dried in an oven at 120°C, cooled to room temperature, and set aside.

[0051] The second step, the preparation of titania nanotube electrode

[0052] The processed titanium alloy sheet is used as the anode, and the platinum wire is used as the cathode, placed in the reactor and the distance between the two electrodes is kept at 50mm, 0.5wt% hydrofluoric acid is put in the plexiglass reactor, and the copp...

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Abstract

The invention relates to a titanium dioxide nanometer tube electrode in the technology field of fathering the environmental pollution and its preparation method as well as its application. Its features lie in: choose the pure titanium or titanium alloy as the substrate, carry out the electrochemical oxidation in the condition of hydrofluoric acid with its density between 0.01wt% and 0.5wt%, form a titanium dioxide nanometer tube with its diameter between 40nm and 100nm and its length between 20nm and 50nm on the substrate vertically and get the integrative titanium dioxide nanometer tube electrode. The preparation features lie in: choose the substrate as the anode after grinding, etching and drying and the platinum sheet as the cathode, control the distance between the two electrodes between 10mm and 50mm, put them into the reactor, power on the stabilized voltage power supply with it voltage between 15V and 25V, after 1-to-30-minute reaction calcine them at the temperature of 400deg.C to 600deg.C for 40nin to 80min, cool it in natural condition and get the titanium dioxide nanometer tube electrode. The titanium dioxide nanometer tube electrode can be applied to the photocatalysed degradation and photoelectroncatalysed degradation to the organic pollutants. It has larger surface area and simple preparation method.

Description

technical field [0001] The invention relates to a titanium dioxide nanotube electrode with a pure titanium sheet or a titanium alloy sheet as a substrate and its chemical preparation method and application, in particular to a method for preparing a titanium dioxide nanotube perpendicular to the surface of a pure titanium sheet or a titanium alloy sheet . An integrated titanium dioxide nanotube electrode made of pure titanium sheet or titanium alloy sheet and titanium dioxide nanotube belongs to the technical field of environmental pollution control. Background technique [0002] Since Fujishima and Honda discovered in 1972 that continuous redox reactions occurred on the surface of titanium dioxide after ultraviolet light irradiation, titanium dioxide as a typical photocatalytic material has been extensively studied. Years of research have shown that titanium dioxide photocatalysis has attractive application prospects in the photochemical degradation of organic pollutants an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06C02F1/30C25B11/00C25D11/26
Inventor 全燮杨绍贵阮修莉赵雅芝赵慧敏陈硕
Owner DALIAN UNIV OF TECH
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