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Vanadium dioxide (VO2) phase change material with beam-shaped nanostructure and preparation method thereof

A technology of nanostructures and phase change materials, which is applied in the direction of nanostructure manufacturing, heat exchange materials, nanotechnology, etc., can solve the problems of disordered arrangement of dimensional and nanomaterials, harsh preparation conditions, high cost repeatability, etc. Novel appearance, resource saving and low cost effect

Inactive Publication Date: 2012-12-12
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The present invention can solve existing VO 2 The arrangement of one-dimensional nanomaterials is disordered, and the preparation method is harsh and costly. A new method with low cost, high repeatability and suitable for large-scale industrial production is provided.

Method used

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  • Vanadium dioxide (VO2) phase change material with beam-shaped nanostructure and preparation method thereof
  • Vanadium dioxide (VO2) phase change material with beam-shaped nanostructure and preparation method thereof
  • Vanadium dioxide (VO2) phase change material with beam-shaped nanostructure and preparation method thereof

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Embodiment 1

[0022] The preparation bundle VO of the present embodiment 2 Nanostructured phase change materials, the specific steps are as follows:

[0023] a. Prepare the reaction solution: dissolve 2.5g of oxalic acid crystals in water, add 8mL of n-butanol, then add 1.5g of vanadium pentoxide powder, and stir until completely dissolved;

[0024] b. Pour the above solution into an autoclave, seal the autoclave and put it into a blast drying oven, keep the reaction at 260°C for 48 hours, after natural cooling, filter and wash to obtain a black powdery material;

[0025] c. Under a nitrogen atmosphere, calcinate the obtained black powder material at a temperature of 550°C for 60 minutes to obtain VO with a bundled nanostructure 2 phase change material.

[0026] The bundled nanostructured VO prepared in this example 2 Phase change material, its X-ray diffraction pattern is as follows figure 1 shown. After scanning electron microscope detection, its SEM picture is as follows figure 2 ...

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Abstract

The invention discloses a vanadium dioxide (VO2) phase change material with a beam-shaped nanostructure. The VO2 phase change material with the beam-shaped nanostructure is characterized in that: the length is 18 to 25 mu m and the diameter is 3 to 5 mu m, wherein a nanobeam crystal is formed through the oriented polymerization of VO2 nanowires with the diameter of 10 to 30 nm. The generated VO2 crystal has a special beam-shaped nanostructure with uniform thickness and consistent length and has phase change property. The invention also discloses a preparation method of the VO2 phase change material with the beam-shaped nanostructure. The VO2 phase change material with the beam-shaped nanostructure and the preparation method thereof have the advantages of low cost, simple growth condition,high repeatability, few impurities and the like and have wide application prospects in the fields of nano photoelectron and intelligent temperature-control energy conservation.

Description

technical field [0001] The invention relates to the technical fields of semiconductor materials, optoelectronic materials, phase change materials and devices, in particular to a VO with a beam-like nanostructure 2 Phase change materials and methods for their preparation. Background technique [0002] Monoclinic VO 2 It is a thermally induced phase change material. When the temperature is lower than 68°C, VO 2 It is in a semiconducting state with a monoclinic crystal structure; when the temperature is higher than 68°C, VO 2 Transforms into a metallic state with a tetragonal rutile structure and a very rapid phase transition. Along with the change of the crystal structure, the resistivity, magnetic susceptibility, light transmittance and reflectivity all produce sudden changes. These properties make VO 2 It has become a photoelectric conversion material, optical storage, laser protection and smart window material with broad application prospects. [0003] Recently, peopl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/02C01G31/02B82B3/00
Inventor 尹海宏郁可张正犁汪阳娄蕾曾敏朱自强
Owner EAST CHINA NORMAL UNIV
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