Coaxial heterojunction TiO2 nanotube array and preparation method thereof

A nanotube array and coaxial heterojunction technology, which is applied in the field of nanotube array film preparation, can solve the problems of reduced specific surface area and adsorption capacity, clogged nanotubes, etc., and achieves performance improvement, distance reduction, and increased contact area. Effect

Inactive Publication Date: 2010-07-28
HUAZHONG UNIV OF SCI & TECH
View PDF0 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the optoelectronic performance of these composite heterojunctions needs to be further improved.
The main reason is that TiO 2 Due to the special surface structure of nanotube arrays, heterog...

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
  • Coaxial heterojunction TiO2 nanotube array and preparation method thereof
  • Coaxial heterojunction TiO2 nanotube array and preparation method thereof
  • Coaxial heterojunction TiO2 nanotube array and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0049] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0050] The method for preparing coaxial heterojunction nanotube arrays described in the present invention is a new method combining electrochemical deposition technology and atomic layer epitaxy technology, which has the advantages of electrochemical room temperature deposition, low cost and accurate atomic layer epitaxy Advantages of controlling the epitaxial layer. The difference from other electrochemical deposition techniques is that it forms a surface chemically limited growth through an underpotential deposition process, and achieves epitaxial growth by electrodepositing single atomic layers of compound constituent elements. The atomic layer deposition of different elements is carried out in different solutions. , so the deposition conditions (deposition potential, reaction solution concentration, etc.) of each element can be op...

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 provides a nanotube with a coaxial heterojunction structure of an ordered array and a preparation method for a nanotube array film with the coaxial heterojunction structure. A surface is formed by an under potential sedimentation process to chemically limit growth and the epitaxial growth is realized from the angle of a monoatomic layer. An epitaxial sensibilization heterogeneous phase is uniformly covered on the tube wall of the TiO2 nanotube to form the coaxial heterojunction structure together with the nanotube array so as to avoid the phenomenon that an epitaxial sensibilization layer blocks the nanotube. The coaxial heterojunction structure cannot reduce specific surface area and adsorbability of the TiO2 nanotube array, is beneficial to improve the contact area of a sensitizing agent and the TiO2 surface and can effectively improve the visible light response performance of the TiO2 nanotube ordered array. The photoelectric conversion efficiency of the CdS/TiO2 coaxial heterojunction nanotube array prepared by the method reaches 8.13 percent under the full spectrum simulated sun illumination. The CdS/TiO2 coaxial heterojunction nanotube array can be widely applied to the fields of photochemical catalysis, solar cell, gas sensing, biomedicine and the like.

Description

technical field [0001] The invention relates to a one-dimensional nanotube array, in particular to a coaxial heterojunction nanotube in an ordered array, and a preparation method for the nanotube array film with the coaxial heterojunction structure. Background technique [0002] TiO 2 Nanotube arrays have good photocatalytic activity and photoelectric conversion efficiency. TiO 2 Belonging to wide bandgap semiconductors, its maximum absorption wavelength is in the ultraviolet region, especially, the highly active nano-TiO developed in recent years 2 For photocatalysts, the light absorption band is further blue-shifted due to the quantum size effect. Since ultraviolet light accounts for less than 5% of the total energy of sunlight, research on how to make TiO 2 It is of great significance to extend the photocatalytic activity to the visible light region, so as to efficiently use sunlight to excite photogenerated carriers. For this reason, many researchers through the TiO...

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
IPC IPC(8): C01G23/047B82B3/00B01J21/06
Inventor 朱文刘喜柳慧琼仝大利
Owner HUAZHONG UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap