A crystalline tungsten trioxide/titanium doped amorphous tungsten oxide nanowire array and its preparation method

A tungsten oxide nanowire and tungsten trioxide nanotechnology, which is applied in the field of crystalline tungsten trioxide/titanium-doped amorphous tungsten oxide nanowire array and its preparation, can solve the problems of slow discoloration, poor cycle stability, and coloring efficiency. Low-level problems, to achieve the effect of fast response, long cycle life and high coloring efficiency

Active Publication Date: 2021-05-07
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Tungsten trioxide has been widely studied as the most promising inorganic electrochromic material. Compared with other transition metal oxides, it has unique color-changing properties, such as: low price, easy synthesis, low energy consumption, high contrast, It has the advantages of strong bonding with the substrate, but the traditional tungsten trioxide also has the disadvantages of slow discoloration and low coloring efficiency
These significantly enhanced functions provide the impetus for the application of vertically oriented tungsten trioxide nanowire array films as templates to synthesize electrochromic materials, but such ultrafine tungsten oxide nanowires also suffer from the disadvantage of poor cycle stability.

Method used

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  • A crystalline tungsten trioxide/titanium doped amorphous tungsten oxide nanowire array and its preparation method
  • A crystalline tungsten trioxide/titanium doped amorphous tungsten oxide nanowire array and its preparation method
  • A crystalline tungsten trioxide/titanium doped amorphous tungsten oxide nanowire array and its preparation method

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Embodiment 1

[0037] A preparation method of crystalline tungsten trioxide / titanium doped amorphous tungsten oxide nanowire array, the specific steps are as follows:

[0038] (1) Place the FTO conductive glass in a beaker filled with acetone, ethanol, and deionized water in turn, and ultrasonicate for 30 minutes respectively, and then put it on filter paper and dry it with an infrared lamp;

[0039] (2) Put the FTO conductive glass cleaned in step (1) on the sample stage of the vacuum chamber of the magnetron sputtering coating system, then place the tungsten trioxide target with a purity of 99.99% on the radio frequency sputtering target position, Adjust the distance between the target and the FTO conductive glass to 5cm; vacuumize until the vacuum in the vacuum chamber reaches 2.0*10 -4 When Pa is below, enter 50 sccm of argon gas and 50 sccm of oxygen gas, adjust the pressure of the vacuum chamber to 0.8 Pa, turn on the radio frequency sputtering control system, sputter a layer of tungst...

Embodiment 2

[0046] A preparation method of crystalline tungsten trioxide / titanium doped amorphous tungsten oxide nanowire array, the specific steps are as follows:

[0047] (1) Place the FTO conductive glass in a beaker filled with acetone, ethanol, and deionized water in turn, and ultrasonicate for 30 minutes respectively, and then put it on filter paper and dry it with an infrared lamp;

[0048] (2) Put the FTO conductive glass cleaned in step (1) on the sample stage of the vacuum chamber of the magnetron sputtering coating system, then place the tungsten trioxide target with a purity of 99.99% on the radio frequency sputtering target position, Adjust the distance between the target and the FTO conductive glass to 5cm; vacuumize until the vacuum in the vacuum chamber reaches 2.0*10 -4 When Pa is below, enter 50 sccm of argon gas and 50 sccm of oxygen gas, adjust the pressure of the vacuum chamber to 0.8 Pa, turn on the radio frequency sputtering control system, sputter a layer of tungst...

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Abstract

The invention discloses a crystalline tungsten trioxide / titanium-doped amorphous tungsten oxide nanowire array, which has a core-shell structure, wherein the crystalline tungsten trioxide nanowire is the core and is obtained by a solvent method; the amorphous titanium The doped tungsten oxide film is used as the shell, which is obtained by magnetron sputtering method with variable temperature; the length of the crystalline tungsten trioxide nanowire is 300-1000nm, and the diameter is 20-50nm; the titanium-doped amorphous tungsten oxide nano-shell is covered It is uniformly coated on the crystalline tungsten oxide nanowires, and the diameter after compounding can be adjusted within the range of 30-150nm. In the present invention, a titanium-doped tungsten oxide thin film is evenly deposited on the surface of tungsten trioxide nanowires by using a magnetron sputtering method to obtain an electrochromic material with a core-shell structure. The structure has excellent electrochromic performance and good stability. And the contrast is high and the conversion speed is fast.

Description

technical field [0001] The invention belongs to the field of material preparation and synthesis, and in particular relates to a crystalline tungsten trioxide / titanium doped amorphous tungsten oxide nanowire array and a preparation method thereof. Background technique [0002] Electrochromism is a kind of optical performance changeable discoloration, which generally refers to the reversible and permanent change of light transmittance and (or) reflectance associated with electrochemical redox reactions after the application of an external electric field or current. The change of the material is intuitively manifested as a process of reversible changes in the color and transparency of the material. Because of its special properties and attractive application prospects, electrochromic materials have quickly become a field of research that researchers are scrambling to study. Electrochromic materials can not only be applied to smart energy-saving windows and information displays...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K9/00B82Y30/00B82Y40/00C23C14/08C23C14/35C23C18/12
CPCB82Y30/00B82Y40/00C09K9/00C23C14/083C23C14/35C23C18/1216
Inventor 吴玉程汤凯张勇史英迪宋艳斌王岩崔接武舒霞秦永强
Owner HEFEI UNIV OF TECH
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