Preparation method of red photonic crystal structure color thin film with photo-catalytic effect

A photonic crystal and photocatalytic technology, applied in the preparation of microspheres, microcapsule preparations, etc., can solve the problem of unexplained photocatalytic performance, etc., and achieve the effect of enhanced catalytic degradation efficiency, bright color, and not easy to fade.

Inactive Publication Date: 2015-08-05
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current research on the photocatalytic properties of photonic crystal structural color thin films is still blank.
For example, the Chinese invention patent application CN201310205537.7 discloses a preparation method of a red photonic crystal structure color glaze, which is obtained on the surface of a ceramic body by the self-assembly technology of silica microspheres. The red photonic crystal structure color glaze has better coloring effect, but did not explain the photocatalytic performance of this red photonic crystal structural color material

Method used

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  • Preparation method of red photonic crystal structure color thin film with photo-catalytic effect
  • Preparation method of red photonic crystal structure color thin film with photo-catalytic effect
  • Preparation method of red photonic crystal structure color thin film with photo-catalytic effect

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Embodiment 1

[0035] A preparation method of a red photonic crystal structural color thin film with photocatalytic effect, comprising the following steps:

[0036] (1) Weigh SiO with a particle size of 285±5nm according to the mass ratio of 1:3 2 A few grams of microsphere powder and polyvinylpyrrolidone (PVP), mix evenly and place in a beaker, according to every 2.0g SiO 2 Add 100mL of water to the microsphere powder and add deionized water to the beaker, stir and mix with magnetic force, filter after reacting for 4 hours, wash, centrifuge and dry the precipitate to obtain PVP-modified SiO 2 Microspheres;

[0037] Among them, the centrifugation is performed at 7000r / min for 12 minutes, the washing is to wash the precipitate with deionized water for 2 to 4 times, and then with absolute ethanol for 2 to 4 times; the drying is carried out at 70°C.

[0038] (2) Accurately weigh step (1) to obtain SiO modified by PVP 2 Add 0.25 g of microspheres into 10 mL of absolute ethanol and mix ultrasoni...

Embodiment 2

[0055] A preparation method of a red photonic crystal structural color thin film with photocatalytic effect, comprising the following steps:

[0056] (1) Weigh SiO with a particle size of 285±5nm at a mass ratio of 1:2.5 2 Several grams of microsphere powder and polyvinylpyrrolidone (PVP), mix evenly and place in a beaker, according to every 1.5g SiO 2 Add 100mL water to the microsphere powder and add deionized water to the beaker, stir and mix with magnetic force, wash, centrifuge and dry after reacting for 3 hours to get PVP-modified SiO 2 Microspheres;

[0057] Among them, centrifugation is performed at 4000r / min for 20 minutes, washing is performed by first washing the precipitate with deionized water for 2 to 4 times, and then washing with absolute ethanol for 2 to 4 times; drying is performed at 80°C.

[0058] (2) Accurately weigh step (1) to obtain SiO modified by PVP 2 Add 0.2 g of microspheres into 10 mL of absolute ethanol and mix ultrasonically for 20 min to obta...

Embodiment 3

[0067] A preparation method of a red photonic crystal structural color thin film with photocatalytic effect, comprising the following steps:

[0068] (1) Weigh SiO with a particle size of 285±5nm according to the mass ratio of 1:2 2 A few grams of microsphere powder and polyvinylpyrrolidone (PVP), mix evenly and place in a beaker, according to every 2.0g SiO 2 Add 100mL water to the microsphere powder and add deionized water to the beaker, stir and mix with magnetic force, filter after reacting for 3 hours, wash, centrifuge and dry the precipitate to obtain PVP-modified SiO 2 Microspheres;

[0069] Among them, centrifugation is performed at 5000r / min for 15 minutes, washing is performed by first washing the precipitate with deionized water for 2 to 4 times, and then washing with absolute ethanol for 2 to 4 times; drying is performed at 70°C.

[0070] (2) Accurately weigh step (1) to obtain SiO modified by PVP 2 Add 0.15 g of microspheres into 10 mL of absolute ethanol and m...

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Abstract

The invention discloses a preparation method of a red photonic crystal structure color thin film with a photo-catalytic effect. The method comprises the following steps: firstly mixing SiO2 microsphere powder with particle diameter of 285+ / -5 nm and polyvinylpyrrolidone and then adding water to prepare PVP (Polyvinyl Pyrrolidone)-modified SiO2 microspheres; then adding into absolute ethyl alcohol to perform ultrasonic treatment to obtain emulsion containing SiO2 microspheres; then preparing mixed solution of lithium hydroxide-ethanol and zinc acetate-ethanol; dropwise adding the emulsion containing SiO2 microspheres into the mixed solution, reacting and then filtering, washing, centrifuging, drying and thermally treating precipitate to prepare the SiO2@ZnO core-shell structure microspheres with the photo-catalytic effect; next adding ethanol into the SiO2@ZnO core-shell structure microspheres to perform ultrasonic dispersion to prepare emulsion; finally vertically inserting a glass substrate into the emulsion by using a vertical deposition method to generate the red photonic crystal structure color thin film with the photo-catalytic effect. The method is simple and easy, causes no pollution to environment, can realize large-scale industrial production and has broad application prospect.

Description

technical field [0001] The invention belongs to the technical field of photonic crystal structural color film preparation, and in particular relates to a preparation method of a red photonic crystal structural color film with photocatalytic effect. Background technique [0002] The photonic crystal structural color is produced because there is a photonic band gap in the photonic crystal material. When the band gap falls within the range of visible light, visible light of a specific frequency cannot continue to propagate through the opal photonic crystal, and these visible light that cannot continue to propagate will be Photonic crystal reflection, and finally coherent diffraction is formed on the surface of photonic crystal with periodic structure, resulting in brilliant and colorful structural colors. After studying the structural colors in nature and artificially prepared, it can be found that this kind of material has the advantages of bright color, never fading, short pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/23B01J13/02B01J23/06
Inventor 王芬张欣王幸盖言成林营王毅朱建锋杨海波
Owner SHAANXI UNIV OF SCI & TECH
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