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

A photonic crystal, orange-yellow technology, applied in the field of photonic crystal structure color thin film preparation, can solve the problem of little research on thin films, and achieve the effects of enhanced catalytic degradation efficiency, no environmental pollution, and easy process.

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

AI Technical Summary

Problems solved by technology

However, the current research on photonic crystal structural color films is limited to the imitation and analysis of color rendering effects in different colors, and the resear

Method used

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

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Experimental program
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Effect test

Embodiment 1

[0035] A method for preparing an orange-yellow photonic crystal structural color film with photocatalytic effect, comprising the following steps:

[0036] (1) Weigh SiO with a particle size of 252±5nm at a mass ratio of 1:2.5 2 A few grams of microsphere powder and polyvinylpyrrolidone (PVP), mix evenly and place in a beaker, according to every 2.0g SiO 2Add 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, centrifugation is performed at 6000r / 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 60°C.

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

Embodiment 2

[0054] A method for preparing an orange-yellow photonic crystal structural color film with photocatalytic effect, comprising the following steps:

[0055] (1) Weigh SiO with a particle size of 252±5nm according to the mass ratio of 1:2 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. After reacting for 4 hours, wash, centrifuge and dry to obtain PVP-modified SiO 2 Microspheres;

[0056] Among them, centrifugation is performed at 5000r / min for 18 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 75°C.

[0057] (2) Accurately weigh step (1) to obtain SiO modified by PVP 2 Add 0.2g of microspheres into 10mL of absolute ethanol and mix ultrasonically f...

Embodiment 3

[0067] A method for preparing an orange-yellow photonic crystal structural color film with photocatalytic effect, comprising the following steps:

[0068] (1) Weigh SiO with a particle size of 252±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 100 mL of water to the microsphere powder and add deionized water to the beaker, stir and mix with a magnetic force, filter after 2 hours of reaction, wash the precipitate, centrifuge, and dry to obtain PVP-modified SiO 2Microspheres;

[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 eth...

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Abstract

The invention discloses a preparation method of an orange-yellow 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 252+/-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 orange-yellow 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 an orange-yellow photonic crystal structural color film with photocatalytic effect. Background technique [0002] Structural color is produced by the phenomenon of interference, scattering or diffraction between the microstructure of the object and visible light. This is a kind of physical coloration, which has the advantages of bright color, never fading, environmental friendliness, and short preparation cycle. Among them, through the ordered self-assembly method of colloidal microspheres, the opal photonic crystals with alternating high and low refractive indices formed also have the characteristics of photonic band gap. When the incident light frequency falls within the band gap range, the incident light will not pass through the photonic crystal. Photonic crystals, the visible light that cannot con...

Claims

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Application Information

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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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