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Method for preparing TiO2@SiO2 coaxial nanotube

A technology of silicon dioxide and titanium dioxide, which is used in the preparation of spinning solutions, chemical characteristics of fibers, conjugated artificial filaments, etc.

Inactive Publication Date: 2012-04-04
CHANGCHUN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, no three-layer coaxial electrospinning technology has been used to prepare TiO 2 SiO 2 Related reports on coaxial nanotubes

Method used

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  • Method for preparing TiO2@SiO2 coaxial nanotube
  • Method for preparing TiO2@SiO2 coaxial nanotube
  • Method for preparing TiO2@SiO2 coaxial nanotube

Examples

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Embodiment

[0021] Example: After stirring a mixture of sesame oil and sorbitan oleate Span-80 at a volume ratio of 1:1 at room temperature for 3 h, an equal volume of butyl titanate Ti(OC 4 h 9 ) 4 , continue to stir for 6 hours and then stand still for 3 hours to obtain a uniform [sesame oil+Span-80+Ti(OC 4 h 9 ) 4 ] mixed solution, as the middle layer spinning solution, wherein the mass percentages of butyl titanate, sesame oil and sorbitan oleate are respectively 50.1%, 23.9% and 26.0%; polyvinylpyrrolidone PVP is added to an appropriate amount of water ethanol C 2 h 5 OH and chloroform CHCl 3 After magnetically stirring for 3 hours at room temperature, add a certain amount of ethyl orthosilicate TEOS, continue to stir for 6 hours and then let it stand for 3 hours to obtain a uniform and transparent [PVP+TEOS+C 2 h 5 OH+CHCl 3 ] solution, as the shell spinning solution, wherein the mass percentages of PVP, TEOS, ethanol and chloroform are respectively 8.0%, 14.7%, 61.7% and 1...

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Abstract

Belonging to the technical field of nano-material preparation, the invention relates to a method for preparing a TiO2@SiO2 coaxial nanotube. The method comprises three steps: (1) spinning solution preparation: mixing polyvinylpyrrolidone, ethyl orthosilicate, absolute ethanol and chloroform so as to form a shell layer spinning solution, and mixing sesame oil, sorbitan oleate and butyl titanate soas to form an intermediate layer spinning solution; (2) preparation of a [sesame oil+Span-80+Ti(OC4H9)4]@[PVP+TEOS] coaxial hollow composite fiber: employing a coaxial electrospinning technology and using a three-layer coaxial spinning head, placing the shell layer spinning solution in an outer tube of the apparatus, putting the intermediate layer spinning solution in an intermediate tube of the apparatus, and leaving the inner tube empty and communicated with the atmosphere; (3) preparation of a TiO2@SiO2 coaxial nanotube: subjecting the coaxial hollow composite fiber to heat treatment so asto obtain the TiO2@SiO2 coaxial nanotube with an average diameter of 650nm. For the obtained TiO2@SiO2 coaxial nanotube, the hollow part has a diameter of 530nm, the inner wall is crystalline TiO2 and has thickness of 30nm, while the shell layer is non-crystalline SiO2 and has thickness of 30nm and length of over 20 micrometers. The method provided in the invention is simple and practicable, thusboasting wide application prospects.

Description

technical field [0001] The invention relates to the technical field of nanomaterial preparation, in particular to a method for preparing coaxial titanium dioxide and silicon dioxide nanotubes. Background technique [0002] The preparation and properties research of one-dimensional nanomaterials such as nanowires, nanobelts, nanotubes and nanocables is one of the frontier hotspots in the field of material science research. In particular, nanotubes have a larger specific surface area, so they are widely used in protein analysis, cell manipulation, artificial blood vessels, diagnostics, fluorescence correlation spectroscopy, catalytic industry, sensors, tap water purification, hydrogen storage industry, energy conversion and environmental protection. It has a wide range of applications and has attracted great attention from the scientific community. [0003] Since the discovery of carbon nanotubes by Iijima in 1991, one-dimensional nanomaterials such as nanowires, nanotubes, n...

Claims

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Application Information

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IPC IPC(8): D01F8/18D01D5/00D01D1/02D01D4/02D01D10/02
Inventor 董相廷徐淑芝盖广清王进贤于文生刘桂霞
Owner CHANGCHUN UNIV OF SCI & TECH
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