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Vanadium oxide nanopillar array with thermochromism and preparation method thereof

A nano-pillar array, nano-array technology, applied in vanadium oxide, nanotechnology for materials and surface science, nanotechnology and other directions, can solve the problems of low visible light transmittance, unsatisfactory solar energy regulation rate, etc. Effects of visible light transmittance and solar modulation rate, visible light transmission rate and solar modulation rate increase, refractive index and light reflection reduction

Active Publication Date: 2014-08-13
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In addition, VO 2 As a smart window material, the low transmittance of visible light and the unsatisfactory solar regulation rate are two bottlenecks restricting the practical application of this material.

Method used

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  • Vanadium oxide nanopillar array with thermochromism and preparation method thereof

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Experimental program
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Embodiment 1

[0026] Put the FTO conductive glass into a solution containing 0.05M butyl titanate, transfer it into a stainless steel hydrothermal reaction kettle with a polytetrafluoroethylene liner, keep it at 150 degrees for 30 minutes, and use the hydrothermal method to heat the FTO conductive glass. Prepare a column diameter of 90nm, a column spacing of 10nm, and a column height of 200nm titanium oxide vertical nano-column arrays, and then put the titanium oxide nano-column arrays into a solution containing 1at%W 6+ Ionic 0.02M VOSO 4 In the aqueous solution, it is transferred to a stainless steel hydrothermal reaction kettle with a polytetrafluoroethylene lining, kept at 280 degrees for 3 hours, and the hydrothermal reaction obtains a W with a thickness of 50nm. 6+ Ion-doped VO 2 (M) Encapsulated titania nanopillar arrays, and then put VO 2 (M) The nanopillars are placed in a 0.02M butyl titanate solution, and after a 150-degree hydrothermal reaction, a titanium oxide-wrapped VO wit...

Embodiment 2

[0028] Put borosilicate glass containing 0.02MZn 2+ solution, transferred to a stainless steel reaction kettle lined with polytetrafluoroethylene, kept at 80 degrees for 10 minutes, and prepared on borosilicate glass with a diameter of 50nm, a distance of 100nm, and a height of 150nm Zn vertical nanopillar arrays, and then put the ZnO nanopillar arrays into the containing 2at% Mg 2+ Ionic 0.01MVO(acac) 2 After soaking in the aqueous solution for 30 minutes, heat treatment under vacuum conditions to obtain Mg with a thickness of 20nm 2+ Ion-doped VO 2 (M) Encapsulated ZnO nanocolumn arrays, and then put VO 2(M) Soak the nano-column in a solution of 0.05M tetraethyl orthosilicate for 10 minutes, take it out, and dry it in a muffle furnace at 300 degrees to obtain a silicon oxide-wrapped VO with a thickness of 100 nm. 2 (M) Array of nanopillars.

Embodiment 3

[0030] Prepare tin oxide vertical nano-arrays with a diameter of 200nm, a pitch of 200nm, and a height of 100nm on sapphire by electron beam evaporation, and then put the nano-columns of tin oxide into 0.5M VOC containing 1.5at% F- ions 2 o 4 In the aqueous solution of , the F-doped M-phase VO with a thickness of 100 nm was obtained after the hydrothermal reaction 2 (M) Wrapped SnO nanocolumn arrays, and then put VO 2 (M) Put the nano-column into the solution of 0.02M zinc acetate and soak it for 20 minutes, take it out, and dry it in a muffle furnace to obtain a zinc oxide-wrapped VO with a thickness of 70nm. 2 (M) Array of nanopillars.

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Abstract

The invention provides a vanadium oxide nanopillar array with thermochromism and a preparation method thereof. The nano-array is a core-shell structure, wherein the core is an oxide A, a second layer is a VO2 layer with thermochromism and a third layer is air or an oxide B so as to form a structure of oxide A / VO2 / air or oxide A / VO2 / oxide B. According to the preparation method, a transparent oxide nanopillar array is prepared by a physical or chemical method to be used as a template; and then a vanadium-containing solution is adhered and heat treatment or hydrothermal reaction is carried out to obtain a vanadium dioxide nanopillar array, or a layer of oxide shell is deposited on the array so as to form the vanadium dioxide sandwich nanopillar array with thermochromism. Due to adjustment of porosity and matching of refractive index, visible light transmittance and solar adjustment rate of a whole vanadium dioxide film can be raised. Thus, the nanopillar array provided by the invention can be better applied in the field of thermochromatic intelligent window.

Description

technical field [0001] The invention relates to a thermochromic vanadium oxide nanocolumn array and a preparation method thereof in the field of energy-saving materials, relates to hydrothermal treatment technology and wet chemical treatment technology, and belongs to the field of new energy-saving and environment-friendly materials. Background technique [0002] Nanomaterials are favored for their unique optical, electrical and magnetic properties. Because of its regular nanostructure and fast electron transport effect, one-dimensional nanoarrays have been widely used in improving the efficiency of solar cells, enhancing the light extraction efficiency of LEDs, and improving hydrogen storage. Vanadium dioxide is a phase change material with many isomers, such as A, B, C, M / R and other phase states. Among them, the M / R phase has a reversible thermally induced phase transition process around 68 degrees, and is favored because it can be used in thermochromic smart windows. H...

Claims

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Application Information

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IPC IPC(8): C01G31/02B82Y30/00B82Y40/00
CPCY02P20/10
Inventor 肖秀娣徐刚柴冠麒张华詹勇军孙耀明
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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