Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of double-pass titanium oxide nanotube array

A technology of titanium oxide nanotubes and nanotube arrays, which is applied in the field of preparation of double-pass titanium oxide nanotube arrays, and can solve problems such as unsafe operation, unstable results, and complicated processes

Inactive Publication Date: 2011-06-15
PEKING UNIV
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods are effective, but there are still many problems, such as complicated process, unstable results and unsafe operation, etc.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of double-pass titanium oxide nanotube array
  • Preparation method of double-pass titanium oxide nanotube array
  • Preparation method of double-pass titanium oxide nanotube array

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: Preparation of double-pass titanium oxide nanotube array

[0021] In this embodiment, the reaction raw materials used are titanium sheets with a purity of 99.7%, deionized water, chemically pure ethylene glycol and ammonium fluoride.

[0022] Firstly, the titanium substrate is ultrasonically cleaned with acetone, alcohol and deionized water, and then the following steps are performed:

[0023] 1. Preparation of electrolyte

[0024] The electrolytic solution is an ethylene glycol solution containing 0.25% (mass percentage) of ammonium fluoride and 0.6% (volume percentage) of water.

[0025] 2. Anodizing

[0026] The titanium sheet was placed in the electrolyte solution prepared in step 1, and anodized at a voltage of 60V for 12h to obtain a titanium oxide nanotube array.

[0027] 3. Voltage transition

[0028] Raise the voltage suddenly to 120V, and keep it for a period of time, such as 1, 3, 5 or 7min.

[0029] 4. Sample washing

[0030] Take out the sa...

Embodiment 2

[0031] Example 2: Preparation of double-pass titanium oxide nanotube array

[0032] In this embodiment, other steps implemented are the same as in Embodiment 1, except that in step 3, the voltage is suddenly increased to 150V, and the duration is correspondingly shortened, respectively 0.5, 1, 2 and 3min, The bottom of the obtained nanotube array as image 3 As shown, it can be seen that the effect of opening the holes at the bottom has a great relationship with the duration of the large voltage after the sudden increase. Within a certain time range, the longer the high voltage lasts, the better the effect of opening the holes at the bottom of the nanotube array. it is good.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a preparation method of a double-pass titanium oxide nanotube array; first, a titanium oxide nanotube array grows on a titanium sheet through anodization in electrolyte, and then the voltage is increased to 90 to 200V and is kept for 0.5 to 10min, and finally the titanium sheet is taken out to be washed, to obtain the double-pass titanium oxide nanotube array which is separated from a titanium sheet substrate. The method separates the titanium oxide nanotube array from the substrate and communicates the bottom of a titanium oxide nanotube through voltage transition, thereby greatly simplifying the preparation process of the double-pass titanium oxide nanotube array; and the preparation parameters are easy to be controlled, the opening effect of the bottom of the titanium oxide nanotube array is good, thereby having great significance in promoting the titanium oxide nanotube array in the application of photoelectric conversion.

Description

technical field [0001] The invention relates to the preparation of a titanium oxide nanotube array, in particular to a preparation method of a double-pass titanium oxide nanotube array. Background technique [0002] As fossil energy tends to be exhausted, the utilization of solar energy becomes increasingly important. Titanium oxide is a wide bandgap semiconductor with important application potential in photoelectric conversion. Titanium oxide nanoparticle films have already played a key role in the photolysis of water using solar energy and the assembly of dye-sensitized solar cells. It is generally believed that TiO nanotube arrays are more suitable for photoelectric conversion applications than TiO thin films because the former has a larger surface-to-volume ratio than the latter and can provide electron channels in a single direction. In this context, a lot of work has been done and important progress has been made in the preparation of titania nanotube arrays in recen...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/26
Inventor 李仕琦张耿民
Owner PEKING UNIV