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Preparation method of structural chromogenic material with photocatalytic effect and stable structure

A structurally chromogenic and structurally stable technology, applied in the direction of silicon oxide, silicon dioxide, titanium dioxide, etc., to achieve the effect of bright color, excellent photocatalytic performance and stable structure

Pending Publication Date: 2021-01-08
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Structural color materials with photocatalytic effect without angle dependence are still little known, and materials with photocatalytic effect with stable structure have never been reported by researchers.

Method used

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  • Preparation method of structural chromogenic material with photocatalytic effect and stable structure
  • Preparation method of structural chromogenic material with photocatalytic effect and stable structure
  • Preparation method of structural chromogenic material with photocatalytic effect and stable structure

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Experimental program
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Effect test

Embodiment 1

[0033] A method for preparing a structurally stable chromogenic material with a photocatalytic effect, comprising the steps of:

[0034] 1) SiO2 2 Preparation of microspheres

[0035] Dissolve ethyl orthosilicate in ethanol solution and mix for 20 minutes, dissolve ammonia in ethanol solution and mix for 10 minutes, drop the ethanol solution of tetraethyl orthosilicate into the ethanol solution of ammonia at a rate of 0.02mL / S, so that the concentration of ammonia 0.2 mol / L, the concentration of ethyl orthosilicate is 0.7 mol / L, 30 ℃ constant temperature stirring reaction for 4h, after the reaction is completed, centrifuge, wash and dry to obtain SiO 2 microsphere powder;

[0036] 2) SiO2 2 Modification of Microspheres

[0037] 0.2 g of 210 nmSiO 2 The microsphere powder was ultrasonically dispersed in 100 mL of ethanol, mixed with 1 mL of ammonia water, and stirred evenly to obtain ammonia water-modified SiO 2 Emulsion of microspheres;

[0038] 3) SiO2 2 @TiO 2 mater...

Embodiment 2

[0045] A method for preparing a structurally stable chromogenic material with a photocatalytic effect, comprising the steps of:

[0046] 1) SiO2 2 Preparation of microspheres

[0047] Dissolve ethyl orthosilicate in ethanol solution and mix for 20 minutes, dissolve ammonia in ethanol solution and mix for 10 minutes, drop the ethanol solution of tetraethyl orthosilicate into the ethanol solution of ammonia at a rate of 0.02mL / S, so that the concentration of ammonia 0.3 mol / L, the concentration of ethyl orthosilicate is 1.2 mol / L, 35 ℃ constant temperature stirring reaction for 3h, after the reaction is completed, centrifuge, wash and dry to obtain SiO 2 microsphere powder;

[0048] 2) SiO2 2 Modification of Microspheres

[0049] 0.1g of 220nmSiO 2 The microsphere powder was ultrasonically dispersed in 100mL ethanol, and mixed with 0.5mL ammonia water, and the SiO modified by ammonia water was obtained after stirring evenly. 2 Emulsion of microspheres;

[0050] 3) SiO2 2...

Embodiment 3

[0057] A method for preparing a structurally stable chromogenic material with a photocatalytic effect, comprising the steps of:

[0058] 1) SiO2 2 Preparation of microspheres

[0059] Dissolve ethyl orthosilicate in ethanol solution and mix for 20 minutes, dissolve ammonia in ethanol solution and mix for 10 minutes, drop the ethanol solution of tetraethyl orthosilicate into the ethanol solution of ammonia at a rate of 0.02mL / S, so that the concentration of ammonia was 0.2 mol / L, the concentration of tetraethyl orthosilicate was 1.4 mol / L, and stirred at 40°C for 5 h. After the reaction was completed, it was centrifuged, washed, and dried to obtain SiO 2 microsphere powder;

[0060] 2) SiO2 2 Modification of Microspheres

[0061] 0.3g 230nmSiO 2 The microsphere powder was ultrasonically dispersed in 100mL of ethanol, mixed with 1.5mL of ammonia water, and stirred evenly to obtain ammonia water-modified SiO 2 Emulsion of microspheres;

[0062] 3) SiO2 2 @TiO 2 material ...

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Abstract

The invention provides a preparation method of a structural chromogenic material with a photocatalytic effect and a stable structure. The method comprises the following steps: preparing monodisperse silica microspheres by adopting a sol-gel method, modifying the surfaces of the silica microspheres with ammonia water, obtaining SiO2-coated TiO2 nano microspheres with uniform particle size by a mixed solvent method, obtaining SiO2-coated TiO2 amorphous photonic crystal by heat treatment under negative pressure, and compounding a PA dispersion liquid with the SiO2-coated TiO2x amorphous photoniccrystal to prepare the amorphous photonic crystal structure chromogenic material with the stable structure and the photocatalytic cherry blossom. According to the invention, oxygen defects are introduced through hot pressing treatment to prepare the structural color without angle dependence, the PA composite amorphous photonic crystal structure can resist damage caused by mechanical external forceso as to make the structural color never fade, a shell layer formed by TiO2 nanocrystals has high electron and hole separation rate so as to improve the photocatalysis function, and the amorphous photonic crystal structure chromogenic material which is stable in structure and free of angle dependence and has the photocatalysis characteristic can replace a traditional pigment in pigment productionand use, and degrades pollutants such as formaldehyde, benzene and the like.

Description

technical field [0001] The technology belongs to the field of structural color materials, and in particular relates to a method for preparing a structurally stable structural color-producing material with a photocatalytic effect. Background technique [0002] In nature, the evolution of color produces extraordinary optical effects, from the brightest iridescent sheen on the feathers of a peacock or the wings of a butterfly, to the adaptive color change of a chameleon or an octopus. These optical effects are usually caused by the complex internal structure of materials at the nanoscale and microscale, on which visible light is reflected, dispersively diffracted, or scattered. After scientifically investigating the microscopic structure of color, it is found that this is a photonic crystal and amorphous photonic crystal structure. Photonic crystals have an arrangement and combination of periodic dielectric structures, also known as photonic band gaps. The appearance of struct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/18C01G23/053C03C17/32
CPCC01B33/18C01G23/053C03C17/009C03C17/32C01P2004/84C01P2004/62C01P2004/32C03C2217/23C03C2217/71C03C2218/11
Inventor 冯篱罗宏杰王芬魏小红朱建锋侯金晓田媛
Owner SHAANXI UNIV OF SCI & TECH