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Preparation method of bimetal center metal organic framework electrochromic film

A metal-organic framework, electrochromic technology, applied in electrolytic organic material coating, optics, nonlinear optics, etc., can solve the problems of metal-organic framework structure damage, achieve good stability, fast response speed, large specific surface area and The effect of porosity

Pending Publication Date: 2022-03-01
GUANGXI UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the high temperature will damage the metal organic framework structure when the hydrothermal method is used, and the metal frame material needs to be processed twice when the metal replacement method is used, and to provide a bimetallic center metal organic framework. Preparation method of frame electrochromic thin film

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  • Preparation method of bimetal center metal organic framework electrochromic film
  • Preparation method of bimetal center metal organic framework electrochromic film
  • Preparation method of bimetal center metal organic framework electrochromic film

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specific Embodiment approach 1

[0023] Specific implementation mode 1: In this implementation mode, a method for preparing a bimetallic-centered metal-organic framework electrochromic film is specifically completed according to the following steps:

[0024] 1. Preparation of Co / Cu alloy film:

[0025] ①. Dissolving anhydrous copper sulfate, cobalt chloride hexahydrate, complexing agent and anhydrous sodium sulfate into deionized water to obtain electroplating solution I;

[0026] ②. In the electroplating solution I obtained in step ①, a three-electrode system is used, with the transparent conductive substrate as the working electrode, the Ag / AgCl as the reference electrode, and the platinum sheet as the counter electrode, applying a constant current for deposition, and then The working electrode is taken out, cleaned and dried to obtain a Co / Cu alloy film;

[0027] 2. Preparation of Co / Cu-TCA film:

[0028] ①. Dissolve triphenylamine 4,4,4,-tricarboxylate and tetrabutylammonium perchlorate into a mixed sol...

specific Embodiment approach 2

[0030] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the complexing agent described in step one 1. is sodium citrate. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0031] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the concentration of anhydrous copper sulfate in the electroplating solution described in step ① is 0.03mol / L~0.04mol / L, hexahydrate The concentration of cobalt chloride is 0.1mol / L-0.2mol / L, the concentration of complexing agent is 0.2mol / L-0.3mol / L, and the concentration of anhydrous sodium sulfate is 0.01mol / L-0.02mol / L. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a preparation method of a bimetallic center metal organic framework electrochromic film, belongs to the field of electrochromic materials, and particularly relates to the preparation method of the bimetallic center metal organic framework electrochromic film. The invention aims to solve the problems that a metal organic framework structure is damaged by high temperature when a hydrothermal method is adopted and a metal framework material needs to be secondarily processed when a metal replacement method is adopted in the prior art. The method comprises the following steps: preparing a Co / Cu alloy film; and 2, preparing the Co / Cu-TCA thin film. The prepared bimetal center metal organic framework electrochromic film shows a larger optical modulation range (70%), higher coloring efficiency (337 cm < 2 > / C), higher response speed (coloring time tc = 6.0 s, and fading time tb = 3.3 s) and better stability. According to the invention, the bimetallic center metal organic framework electrochromic film can be obtained.

Description

technical field [0001] The invention belongs to the field of electrochromic materials, and in particular relates to a preparation method of a bimetallic center metal organic framework electrochromic film. Background technique [0002] Electrochromism refers to the change of the optical properties (reflectivity, absorptivity or transmittance) of a material as the external voltage or current changes, which is manifested as a change in the color and transparency of the material macroscopically. With the development of science and technology, electrochromic technology has been applied in smart windows, military camouflage, aerospace and other fields. As an emerging material that has developed rapidly in recent years, metal-organic framework materials have the advantages of large specific surface area, high porosity, variable metal centers, and small volume in electrochemical reactions, and are regarded as ideal electrodes. Material. When metal organic framework materials are a...

Claims

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Application Information

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IPC IPC(8): C03C17/00C25D7/00C25D3/56C25D9/02G02F1/155
CPCC03C17/009C25D7/00C25D3/56C25D9/02G02F1/155
Inventor 曲慧颖冯帅童张法纪红兵
Owner GUANGXI UNIV
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