Prussian blue/tungsten trioxide electrochromic film and preparation method thereof

A technology of tungsten trioxide and Prussian blue, which is applied in the direction of tungsten oxide/tungsten hydroxide, ferricyanide, metal cyanide, etc., can solve the problem of inability to selectively adjust light and heat in the visible and near-infrared bands, low coloring efficiency, Narrow modulation range and other issues, to improve coloring efficiency, facilitate embedding and extraction, and achieve selective modulation

Active Publication Date: 2019-03-08
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the technical problems of the existing single electrochromic material in the field such as long discoloration time, narrow modulation range, low coloring efficiency, and inability to selectively adjust light and heat in the vis...

Method used

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  • Prussian blue/tungsten trioxide electrochromic film and preparation method thereof
  • Prussian blue/tungsten trioxide electrochromic film and preparation method thereof
  • Prussian blue/tungsten trioxide electrochromic film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0049] (1) Clean the substrate: Clean the glass slide and ITO conductive glass sequentially with acetone, ethanol, and deionized water for 30 minutes, and then dry them with a plasma cleaner for 3 minutes to obtain clean glass slides and ITO conductive glass;

[0050] (2) Prepare the template:

[0051] a. Drop the suspension containing polystyrene microspheres onto the clean glass slide of step (1) to flatten, and dry to obtain a glass slide with polystyrene microspheres; the polystyrene microspheres in the suspension The spherical particle size is 500nm;

[0052] b. Put the glass slide flat on the water surface, pick up the polystyrene microspheres with the clean ITO conductive glass in step (1), and heat at 110°C for 1 min to obtain a polystyrene template with a single layer of polystyrene microspheres spread ;

[0053] (3) Electrochemical deposition of tungsten trioxide film: Dissolve sodium tungstate, hydrogen peroxide and hydrochloric acid in water to form an electrodep...

Embodiment 2

[0059] (1) Clean the substrate: Clean the glass slide and FTO conductive glass sequentially with acetone, ethanol, and deionized water for 40 minutes, and then dry them with a plasma cleaner for 1 minute to obtain clean glass slides and FTO conductive glass;

[0060] (2) Prepare the template:

[0061] a. Drop the suspension containing polystyrene microspheres onto the clean glass slide of step (1) to flatten, and dry to obtain a glass slide with polystyrene microspheres; the polystyrene microspheres in the suspension The spherical particle size is 200nm;

[0062] b. Put the glass slide flat on the water surface, pick up the polystyrene microspheres with the clean FTO conductive glass in step (1), and heat at 100°C for 3 minutes to obtain a polystyrene template with a single layer of polystyrene microspheres spread ;

[0063] (3) Electrochemical deposition of tungsten trioxide film: Dissolve sodium tungstate, hydrogen peroxide and hydrochloric acid in water to form an electro...

Embodiment 3

[0067] (1) Clean the substrate: Clean the glass slide and ITO conductive glass sequentially with acetone, ethanol, and deionized water for 20 minutes, and then dry them with a plasma cleaner for 10 minutes to obtain clean glass slides and ITO conductive glass;

[0068] (2) Prepare the template:

[0069] a. Drop the suspension containing polystyrene microspheres onto the clean glass slide of step (1) to flatten, and dry to obtain a glass slide with polystyrene microspheres; the polystyrene microspheres in the suspension The spherical particle size is 2μm;

[0070] b. Put the glass slide flat on the water surface, pick up the polystyrene microspheres with the clean ITO conductive glass in step (1), and heat at 90°C for 5 minutes to obtain a polystyrene template with a single layer of polystyrene microspheres spread ;

[0071] (3) Electrochemical deposition of tungsten trioxide film: Dissolve sodium tungstate, hydrogen peroxide and hydrochloric acid in water to form an electrod...

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Abstract

The invention discloses a prussian blue/tungsten trioxide electrochromic film and a preparation method thereof. The film has a double-array ordered structure and large specific surface area and can increase ordered ion diffusion channels for electrolyte ions and selectively modulate near infrared light bands and visible light bands. The preparation method comprises the steps as follows: firstly, taking a polystyrene template as a working electrode and an aqueous solution of sodium tungstate, hydrogen peroxide and hydrochloric acid as an electrodeposition solution, removing the polystyrene template after electrochemical deposition to obtain a tungsten trioxide electrochromic film with a bowl-like ordered structure, then, taking the obtained tungsten trioxide electrochromic film with the bowl-like ordered structure as a working electrode and an aqueous solution of FeCl3, K3[Fe(CN)]6 and KCl as an electrodeposition solution, and performing electrochemical deposition to obtain the prussianblue/tungsten trioxide electrochromic film. The preparation method requires no roasting and has the advantages that the method is convenient to operate, efficient and energy-saving, the product is controllable and the like.

Description

technical field [0001] The invention relates to the field of electrochromic thin films, in particular to a Prussian blue / tungsten trioxide electrochromic thin film and a preparation method thereof. Background technique [0002] Electrochromism refers to the process of stable and reversible changes in the color or transmittance of materials under the external regulation of voltage. Scholars at home and abroad have conducted in-depth and extensive research on electrochromic thin films and their applications. [0003] For solar radiation, the energy of visible light (0.4-0.7 μm in wavelength) accounts for 45% of the total energy of solar radiation, and the near-infrared light (0.7-2.5 μm in wavelength) accounts for 49%. Visible light affects the indoor lighting of buildings, and visible light and near-infrared light also affect the indoor temperature. If you want to achieve optimal energy saving, you need to realize the controllable adjustment of visible light and near-infrar...

Claims

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Application Information

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IPC IPC(8): C01C3/12C01G41/02C03C17/22
CPCC01C3/12C01G41/02C01P2004/03C03C17/22
Inventor 刘涌滑晨铮韩高荣汪建勋
Owner ZHEJIANG UNIV
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