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Prussian blue composite photonic crystal and preparing method and application thereof

A photonic crystal, composite particle technology, applied in crystal growth, chemical instruments and methods, single crystal growth, etc., can solve problems such as easy collapse, performance impact, poor adhesion of substrates, etc., and achieve color change brightness and saturation. Increased, improved square wave scan performance, improved color uniformity effects

Inactive Publication Date: 2016-03-09
BEIJING INSTITUTE OF CLOTHING TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The color-changing behavior of organic electrochromic materials comes from their redox reactions, which have rich color changes and are easy to optimize performance by changing the molecular structure, but there are also some disadvantages: such as poor chemical stability and radiation resistance, and poor compatibility with substrates. Poor adhesion, etc.
In addition, the inverse opal structure needs to be further calcined or etched on the basis of the composite material, which increases the difficulty of application, and if the filled material structure is relatively soft, the inverse opal formed after removing the microspheres The structure is prone to collapse and cannot maintain its fixed and complete shape, so it will also have a certain impact on its performance

Method used

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  • Prussian blue composite photonic crystal and preparing method and application thereof
  • Prussian blue composite photonic crystal and preparing method and application thereof
  • Prussian blue composite photonic crystal and preparing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0083] Preparation Example 1: SiO 2 Preparation of Photonic Crystals

[0084] Isopropanol: water: ammonia water: tetraethyl orthosilicate (TEOS) = 25:5:1.5:3 (volume ratio).

[0085] First, mix isopropanol, water, and ammonia water in the above ratio, stir at a constant speed of 400r / min at a temperature of 70°C to mix the three evenly, then add tetraethyl orthosilicate drop by drop, and keep the previous stirring The reaction was carried out at speed and temperature for 5 hours. After the reaction, the resulting SiO 2 The microsphere suspension was washed several times by centrifugation with water and ethanol respectively (for example, washed with water and ethanol three times each), and the finally obtained SiO 2 Microspheres uniformly dispersed in ethanol to obtain SiO 2 ethanol dispersion. and then dried in an oven to obtain SiO 2 The powder is SiO 2 Microspheres (can also be selected by commercially available SiO 2 Microspheres, used for the preparation of p...

preparation example 2

[0089] Preparation example 2: PB-SiO 2 Preparation of Photonic Crystals

[0090] PB-SiO 2 Electrodeposition of photonic crystals is done in a three-electrode system.

[0091] Reagent: PB nanoparticles. Commercially available, for example, PB with the reference number 71034644 available from Sinopharm Chemical Reagent Co., Ltd. It can also be prepared with reference to methods known in the art, for example, with reference to the following method:

[0092] Use 10 mL of 5 mmol / L FeCl 3 , 10mL of 5mmol / LK 3 Fe(CN) 6 , both are prepared with 0.1mol / L KCl solution. During the reaction, 10mL of 5mmol / LFeCl was first 3 Pour the solution into a beaker, use 0.01mol / L HCl to adjust the pH value to 2, then add 10mL of 5mmol / LK 3 Fe(CN) 6 solution. The reaction between the two forms PB particles.

[0093] SiO is arranged on the surface prepared with the above preparation example 1 2 The ITO glass of the microsphere photonic crystal is used as the working electrode, the 1...

Embodiment 1

[0104] Embodiment 1: scanning electron microscope observation

[0105] Japan JEOL company JSM-6360LV electron microscope.

[0106] The sample is as follows:

[0107] The SiO that above preparation example 1 makes 2 Photonic crystal, the PB-SiO that preparation example 2 makes 2 composite photonic crystals; and

[0108] The control sample 1-1 that the above comparison preparation example 1 makes, the comparison sample 2-1 and 2-2 that the comparison preparation example 2 makes, the comparison sample 3-1 and 3-2 that the comparison preparation example 3 makes, contrast The control sample 4-1 prepared in Preparation Example 4.

[0109] The results are shown in Figure 1.

[0110] From Figure 1A It can be seen that the SiO 2 The average particle size of the microspheres is about 330nm, the size is uniform, and they are neatly arranged in a hexagonal structure on the surface of the ITO glass. Figure 1A The cross-sectional view of the sample is Figure 1B SiO 2 The number...

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Abstract

The invention belongs to the fields of chemical engineering and materials, and particularly relates to the field of the electrochromic material, in particular to a Prussian blue composite photonic crystal (composite membrane) and a preparing method and application thereof. More specifically, an inorganic electrochromic material SiO2 composite photonic crystal is provided. Preferably, the inorganic electrochromic material is Prussian blue. The composite photonic crystal has high electrochromism performance.

Description

technical field [0001] The invention belongs to the fields of chemical industry and materials, in particular, belongs to the field of electrochromic materials. The invention relates to an inorganic electrochromic material-SiO 2 Composite photonic crystals, in particular, relate to russian blue composite photonic crystals (composite films), their preparation methods and applications. Background technique [0002] Electrochromism means that under the action of an external current or electric field, the optical properties of the material produce a stable and reversible change in the visible light wavelength range, and the appearance is manifested as a reversible change in optical properties such as color. As the core components of devices, electrochromic materials are usually divided into two categories: inorganic electrochromic materials and organic electrochromic materials. [0003] There is a very large difference between inorganic electrochromic materials and organic elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/12C30B29/16C30B28/04C25D9/02
CPCC01B33/126C01P2004/32C01P2004/62C25D9/02C30B28/04C30B29/16
Inventor 李昕王锐秦咪咪廖佳星张焱郑一平张德权李文霞
Owner BEIJING INSTITUTE OF CLOTHING TECHNOLOGY
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