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Method for preparing nanocrystalline superstructure tube or rod based on template epitaxial assembly

A superstructure and nanocrystalline technology, applied in the fields of nanotechnology, nanocarbon, nanotechnology, etc. for materials and surface science, can solve the problems of unfavorable nanoparticle assembly, poor structural uniformity, difficult preparation, etc., and achieve orderly structure. high degree of effect

Inactive Publication Date: 2019-10-11
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has obvious disadvantages: firstly, the two-dimensional materials modified by CTAB are easier to stack on themselves, which is not conducive to further assembly with nanoparticles; secondly, the structure uniformity is poor; finally, it is difficult to prepare new superstructures such as superstructure tubes or rods. Material

Method used

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  • Method for preparing nanocrystalline superstructure tube or rod based on template epitaxial assembly
  • Method for preparing nanocrystalline superstructure tube or rod based on template epitaxial assembly
  • Method for preparing nanocrystalline superstructure tube or rod based on template epitaxial assembly

Examples

Experimental program
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Effect test

Embodiment 1

[0026] A method for preparing nanocrystalline superstructure tubes based on template epitaxy assembly, the specific steps are as follows:

[0027] (1) Cubic Fe 3 o 4 Synthesis of Nanocrystals

[0028] A 500 mL three-necked flask was selected, and 18 g of iron oleate, 3.1 g of sodium oleate, 5.5 g of oleic acid, and 40 g of octadecene solvent were added. Under the condition of stirring, after vacuum degassing at 120 °C for one hour, it was heated to 320 °C under the protection of nitrogen atmosphere, and kept at this temperature for two hours. When cooled to room temperature, it was purified by adding ethanol / isopropanol solvent precipitation, and then dispersed in n-hexane to form a stable cubic Fe 3 o 4 Nanocrystalline Colloidal Solution.

[0029] (2) Surface modification of anodized aluminum template

[0030] Put the initial anodized aluminum template into a n-hexane solution containing 0.2M oleic acid, and let it stand for 6 hours to obtain an oleic acid-modified anod...

Embodiment 2

[0035] A method for preparing nanocrystalline superstructure rods based on template epitaxy assembly, the same as in Example 1, wherein:

[0036] (2) No treatment was performed on the alumina template of the initial prototype.

Embodiment 3

[0038] A method for preparing nanocrystalline superstructure tubes based on template epitaxy assembly, the same as in Example 1, wherein:

[0039] (2) The standing time is 0.1h;

[0040] (3) The assembly temperature is 0°C, and the assembly time is 0.1h;

[0041] (4) The alkaline solution is undiluted concentrated ammonia water.

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Abstract

The invention belongs to the technical field of inorganic materials, and particularly relates to a method for preparing a nanocrystalline superstructure tube or rod based on template epitaxial assembly. According to the method, anodized aluminum oxide (AAO) modified by organic ligand molecules is used as a template, and through control of the assembly temperature, the carbon-coated ordered nanocrystalline superstructure tube (or rod) is prepared. A monodisperse colloidal nanoparticle dispersion solution is prepared by a solution method, the AAO template subjected to surface modification by theorganic ligand molecules is added to the colloidal nanocrystalline dispersion solution, a nanocrystalline superstructure assembled on an AAO channel is obtained through solvent volatilization at a certain temperature, and after carbonization of the nanocrystalline superstructure, the template is removed by a concentrated alkali solution to obtain an ordered nanocrystalline superstructure tube (orrod) material. The method has high universality, and the tube or rod superstructure can be obtained by changing the type, shape and concentration of particles and the pore size of the AAO. The methodis simple, novel and highly controllable and has a wide application range, and raw materials are easy to obtain.

Description

technical field [0001] The invention belongs to the technical field of inorganic materials, and specifically relates to a method for preparing nanocrystalline superstructure tubes or superstructure rods based on template epitaxy assembly, in particular to a template epitaxy method, which uses anodized aluminum oxide (AAO) to prepare carbon-coated A method for ordered tube (or rod)-like nanocrystalline superstructures. Background technique [0002] Confined assembly is also called template assembly. Simply put, it is a method of completing the assembly process of nanocrystals in a limited space through various methods. First of all, the same nanocrystalline particles will break its most natural and densest packing mode when the space used changes, thus bringing some nanocrystalline superstructures with special structures, which can further expand the application range of nanocrystalline superstructure materials . Secondly, the change of the confined space will also have a s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/08C01G45/02C01G51/00C01B32/15B82Y40/00B82Y30/00
CPCB82Y30/00B82Y40/00C01G45/02C01G49/08C01G51/00C01P2004/80C01B32/15
Inventor 董安钢李同涛宁静杨东韩文茜李明重邓雨薇邹金祥
Owner FUDAN UNIV
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