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Titanium dioxide nanocomposite and one-step preparation method by utilizing anodic oxidation device

A nanocomposite material, titanium dioxide technology, applied in the field of electrode materials and its preparation, can solve the problems of low nanotube length and inability to fully meet the length requirements

Inactive Publication Date: 2012-07-04
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in order to further improve the TiO 2 For the photocatalytic efficiency of nanotubes, researchers have used anodic oxidation, hydrothermal synthesis, etc. to prepare self-assembled nanotubes with different lengths and diameters. However, the lengths of the prepared nanotubes are all less than 30 μm. Tubes cannot fully meet the length requirements of solar cells using titania nanotubes as electrode materials

Method used

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  • Titanium dioxide nanocomposite and one-step preparation method by utilizing anodic oxidation device
  • Titanium dioxide nanocomposite and one-step preparation method by utilizing anodic oxidation device
  • Titanium dioxide nanocomposite and one-step preparation method by utilizing anodic oxidation device

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Embodiment 1

[0019] The anodic oxidation method uses a constant voltage power supply instrument and uses a two-electrode system (the anode is a pure titanium sheet and the cathode is a platinum sheet) in NH 4 A method for preparing nanomaterials by reacting in a mixed solution of F-ethylene glycol / water.

[0020] The process parameters used in the formation of anodic oxidation are:

[0021] Anodizing voltage: 60V

[0022] Anodizing temperature (solution temperature): 20°C

[0023] Anodizing time: 20h

[0024] Electrolyte concentration: NH 4 The concentration of F is 0.3wt%, the volume percentage of water is 2vol%

[0025] Its steps of the preparation method of above-mentioned novel nano-material are as follows:

[0026] (1) Polish the pure titanium sheet with 240#, 400#, 600#, 800#, 1500#, 2000#, 3000# sandpaper in sequence until smooth, then clean it with deionized water, and dry it by ultrasonication with absolute ethanol for 5 minutes.

[0027] (2) Put the pure titanium sheet into...

Embodiment 2

[0030] The anodic oxidation method uses a constant voltage power supply instrument and uses a two-electrode system (the anode is a pure titanium sheet and the cathode is a platinum sheet) in NH 4 A method for preparing nanomaterials by reacting in a mixed solution of F-ethylene glycol / water.

[0031] The process parameters used in the formation of anodic oxidation are:

[0032] Anodizing voltage: 50V

[0033] Anodizing temperature (solution temperature): 30°C

[0034] Anodizing time: 16h

[0035] Electrolyte concentration: NH 4 The concentration of F is 0.2wt%, the volume percentage of water is 5vol%

[0036] Its steps of the preparation method of above-mentioned novel nano-material are as follows:

[0037] (1) Polish the pure titanium sheet with 240#, 400#, 600#, 800#, 1500#, 2000#, 3000# sandpaper in sequence until smooth, then clean it with deionized water, and dry it by ultrasonication with absolute ethanol for 5 minutes.

[0038] (2) Put the pure titanium sheet into...

Embodiment 3

[0041] The anodic oxidation method uses a constant voltage power supply instrument and uses a two-electrode system (the anode is a pure titanium sheet and the cathode is a platinum sheet) in NH 4 A method for preparing nanomaterials by reacting in a mixed solution of F-ethylene glycol / water.

[0042] The process parameters used in the formation of anodic oxidation are:

[0043] Anodizing voltage: 70V

[0044] Anodizing temperature (solution temperature): 60°C

[0045] Anodizing time: 48h

[0046] Electrolyte concentration: NH 4 The concentration of F is 0.1wt%, the volume percentage of water is 3vol%

[0047] Its steps of the preparation method of above-mentioned novel nano-material are as follows:

[0048] (1) Polish the pure titanium sheet with 240#, 400#, 600#, 800#, 1500#, 2000#, 3000# sandpaper in sequence until smooth, then clean it with deionized water, and dry it by ultrasonication with absolute ethanol for 5 minutes.

[0049] (2) Put the pure titanium sheet into...

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Abstract

The invention discloses a titanium dioxide nanocomposite and a one-step preparation method by utilizing an anodic oxidation device; the preparation method comprises the steps of: polishing a pure titanium sheet to be smooth, cleaning ultrasonically and drying, fixing the pure titanium sheet to an anode by the anodic oxidation device, fixing a platinum gauze electrode to a cathode, and placing the pure titanium sheet and the platinum gauze electrode into electrolyte to perform an electrochemical reaction, wherein the electrolyte is an ethylene glycol / water mixing solution of ammonium fluoride, the concentration of NH4F in the solution is 0.1wt%-0.5wt%, the volume ratio of water is 1vol%-5vol%, the temperature of the solution is kept to be 20 DEG C-60 DEG C,the reaction time is 16 hours-48 hours, and the anodic oxidation voltage is 50V-70V. In the invention, the preparation process with low cost and simple preparation process is provided, a composite structure material of a nanotube and a nanowire in a microstructure can be provided, and good photoelectric efficiency is achieved.

Description

technical field [0001] The invention relates to a nanometer material and a preparation method thereof, more specifically, an electrode material used as an electrode material of a solar cell in the field of photocatalysis and a preparation method thereof. Background technique [0002] At present, due to the increasingly severe energy shortage, people are beginning to look for green and efficient solar energy to replace traditional energy. At present, scholars at home and abroad have begun to study photocatalysts with large specific areas, so as to effectively improve the efficiency of solar cells. Titanium dioxide nanotubes have become one of the most popular photocatalysts due to their excellent properties such as low preparation cost, large specific surface area, regular surface morphology, good photostability and chemical inertness. At present, in order to further improve the TiO 2 For the photocatalytic efficiency of nanotubes, researchers have used anodic oxidation, hy...

Claims

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Application Information

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IPC IPC(8): C25D11/26
Inventor 杨绘春崔振铎杨贤金朱胜利
Owner TIANJIN UNIV
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