Polythiophene/tungsten trioxide nanorod electrochromic material and preparation method thereof

An electrochromic material, tungsten trioxide technology, applied in the direction of chemical instruments and methods, luminescent materials, etc., can solve the problems of poor chemical stability, slow color change response time, unsatisfactory color uniformity, etc., to speed up the reaction power The effect of chemical process, controllable film thickness, and increased electron transport speed and particle diffusion rate

Active Publication Date: 2017-08-11
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the color change response time of tungsten oxide is very slow, usually tens of seconds, which limits its practical application, while organic materials have the advantage of fast response rate, but the color uniformity is not ideal, and the chemical stability is not good

Method used

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  • Polythiophene/tungsten trioxide nanorod electrochromic material and preparation method thereof
  • Polythiophene/tungsten trioxide nanorod electrochromic material and preparation method thereof
  • Polythiophene/tungsten trioxide nanorod electrochromic material and preparation method thereof

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Embodiment 1

[0032] A preparation method of polythiophene / tungsten trioxide nanorod electrochromic material, the specific steps are as follows:

[0033] (1) Place the FTO conductive glass in a beaker filled with acetone, ethanol, and deionized water in sequence, and ultrasonicate for 10 minutes respectively, and then put it on filter paper and dry it with an infrared lamp;

[0034] (2) Preparation of peroxytungstic acid solution: Dissolve 1.25g of tungstic acid in 30mL of deionized water by heating and stirring, then add 10mL of hydrogen peroxide with a mass fraction of 30% to it, stir until the solution is clear, and then dissolve it with deionized water Dilute the solution to a tungsten concentration of 0.05mol / L, and the diluted solution is peroxytungstic acid solution;

[0035] (3) Preparation of precursor solution: 11 mL of peroxytungstic acid prepared in step (2), 44 mL of acetonitrile, and 11 mL of deionized water were made into a mixed solution, and then the pH of the mixed solutio...

Embodiment 2

[0041] A preparation method of polythiophene / tungsten trioxide nanorod electrochromic material, the specific steps are as follows:

[0042] (1) Place the FTO conductive glass in a beaker filled with acetone, ethanol, and deionized water in turn, and ultrasonicate for 10 minutes respectively, and then put it on filter paper and dry it with an infrared lamp;

[0043] (2) Preparation of peroxytungstic acid solution: dissolve 1.25g of tungstic acid in 30mL of deionized water by heating and stirring, then add 10mL of hydrogen peroxide with a mass fraction of 30% to it, stir until the solution is clear, and then dissolve it with deionized water Dilute the solution to a tungsten concentration of 0.05mol / L, and the diluted solution is peroxytungstic acid solution;

[0044] (3) Preparation of precursor solution: 11 mL of peroxytungstic acid prepared in step (2), 44 mL of acetonitrile, and 11 mL of deionized water were made into a mixed solution, and then the pH of the mixed solution was ...

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Abstract

The invention discloses a polythiophene / tungsten trioxide nanorod electrochromic material. The polythiophene / tungsten trioxide nanorod electrochromic material has a core-shell structure, tungsten trioxide nanorods are used as a core, polythiophene is used as a shell, the diameter of the tungsten trioxide nanorods is 50-100 nm, the polythiophene has a porous structure, the thickness of the polythiophene is 2-10 nm, the average pore size of the polythiophene is 2-3 nm, and the polythiophene uniformly wraps the tungsten trioxide nanorods. By an electrochemical working station and a three-electrode system, thiophene monomers are polymerized on the surface of FTO conductive glass subjected to thermal treatment by a solvent in an electrochemical polymerization mode, and therefore, the electrochromic material is prepared. The tungsten trioxide nanorods are perpendicular to a substrate, and grow and are distributed uniformly, and the polythiophene has the porous structure and uniformly wraps the peripheries of the nanorods to form the novel core-shell structure. The material has the excellent electrochromic property; the transparent material can be rapidly reversibly converted into the navy-blue material under different voltages; circulation stability is good; and therefore, the polythiophene / tungsten trioxide nanorod electrochromic material can be used as a concealed material and an intelligent color changeable film.

Description

technical field [0001] The invention belongs to the field of electrochromic thin films, and specifically relates to a polythiophene / tungsten trioxide nanorod electrochromic material and a preparation method thereof. Background technique [0002] Electrochromism refers to the phenomenon that the color of a material changes reversibly under an external electric field. Due to the great application prospects of electrochromic materials in the fields of stealth materials and intelligent color-changing films, people have paid more and more attention to them in recent years. Transition metal oxides are the most widely studied electrochromic materials, among which crystalline tungsten oxide usually has a single color, excellent chemical stability and thermal stability, and can realize the transformation from transparent to blue under positive and negative voltage conversion. Compared with other transition metal oxides, tungsten oxide has better discoloration efficiency and stabilit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/68C09K11/06
Inventor 张勇史英迪汤凯宋艳斌崔接武王岩秦永强舒霞吴玉程
Owner HEFEI UNIV OF TECH
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