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A kind of preparation method of sio2-sio2 homogeneous double size colloidal crystal

A colloidal crystal, double-sized technology, applied in the field of preparation of SiO2-SiO2 homogeneous double-sized colloidal crystals, can solve problems such as restricting the development and application of new structures

Inactive Publication Date: 2015-09-30
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The self-assembly method is one of the main preparation methods of photonic crystals at present. It mainly uses colloidal balls such as silica and polystyrene to self-assemble on a specific substrate to form a close-packed structure. Usually, the colloidal crystals obtained by this method are surface-to-surface. Centered cubic close-packed structure, and its hexagonal arrangement parallel to the base plane (111), limits the development and application of new structures

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A SiO 2 -SiO 2 The preparation method of homogeneous double-size colloidal crystal comprises the following steps:

[0015] (1) Prepare a KCl aqueous solution with a mass concentration of 0.12%, respectively configure an ethanol solution A of tetraethyl orthosilicate and an ethanol solution B of ammonia water, wherein the amount of absolute ethanol in solution A and solution B is equal, and the total amount of absolute ethanol is equal to The volume ratio of ammonia water is 5:1, the volume ratio of the amount of ammonia water to tetraethyl orthosilicate is 2:1, and then 2mL of KCl aqueous solution is added to solution B, and the volume ratio of KCl aqueous solution to ammonia water is 1:1. Then, solution A was added to solution B under constant stirring, and after 20 hours of reaction, the precipitate was separated, washed by centrifugation and dried at 50°C to obtain surface-modified SiO 2 Nanosphere or submicron spherical powder;

[0016] (2) Weighing SiO2 2 Powde...

Embodiment 2

[0020] A SiO 2 -SiO 2 The preparation method of homogeneous double-size colloidal crystal comprises the following steps:

[0021] (1) Prepare a KCl aqueous solution with a mass concentration of 0.2%, respectively configure an ethanol solution A of tetraethyl orthosilicate and an ethanol solution B of ammonia water, wherein the amount of absolute ethanol in solution A and solution B is equal, and the total amount of absolute ethanol is equal to The volume ratio of ammonia water is 12.5:1, the volume ratio of the amount of ammonia water to tetraethyl orthosilicate is 4:1, and then 4mL of KCl aqueous solution is added to solution B, and the volume ratio of KCl aqueous solution to ammonia water is 1:5. Then, solution A was added to solution B under constant stirring, and after 22 hours of reaction, the precipitate was separated, washed by centrifugation and dried at 60°C to obtain surface-modified SiO 2 Nanosphere or submicron spherical powder;

[0022] (2) Weighing SiO2 2 Pow...

Embodiment 3

[0026] A SiO 2 -SiO 2 The preparation method of homogeneous double-size colloidal crystal comprises the following steps:

[0027] (1) Prepare a KCl aqueous solution with a mass concentration of 0.165%, respectively configure an ethanol solution A of tetraethyl orthosilicate and an ethanol solution B of ammonia water, wherein the amount of absolute ethanol in solution A and solution B is equal, and the total amount of absolute ethanol is equal to The volume ratio of ammonia water is 7.75:1, the volume ratio of the amount of ammonia water to tetraethyl orthosilicate is 3.2:1, and then 3mL of KCl aqueous solution is added to solution B, and the volume ratio of KCl aqueous solution to ammonia water is 1:2.85, Then, solution A was added to solution B under constant stirring, and after 20 hours of reaction, the precipitate was separated, washed by centrifugation and dried at 60°C to obtain surface-modified SiO 2Nanosphere or submicron spherical powder;

[0028] (2) Weighing SiO2 ...

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Abstract

The invention discloses a preparation method of a SiO2-SiO2 homogenous double-dimension colloidal crystal. A periodically ordered novel SiO2-SiO2 homogenous double-dimension colloidal crystal structure can be obtained by preparing a surface charged silicon dioxide colloidal sphere in a reaction system of tetraethoxysilane by adopting KCl, self-assembling an electric field on an ITO (indium-tin-oxide) glass substrate to form a silicon dioxide colloidal crystal, uniformly filling silicon oxide gel in a silicon dioxide colloidal crystal template via an immersion method and a double-substrate injection method and then drying and calcining.

Description

technical field [0001] The present invention relates to a SiO 2 -SiO 2 Preparation method of homogeneous double-sized colloidal crystals. Background technique [0002] A material that selectively inhibits or modulates the propagation of light of a specific wavelength by using dielectric materials with different dielectric constants or refractive indices in one-dimensional, two-dimensional or three-dimensional directions is periodically arranged in an orderly manner. Photonic crystals. The self-assembly method is one of the main preparation methods of photonic crystals at present. It mainly uses colloidal balls such as silica and polystyrene to self-assemble on a specific substrate to form a close-packed structure. Usually, the colloidal crystals obtained by this method are surface-to-surface. The center-cubic dense packing is the main structure, and its hexagonal arrangement structure parallel to the base plane is (111) plane, which limits the development and application ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/12C03C17/23
Inventor 伍媛婷徐驰王秀峰
Owner SHAANXI UNIV OF SCI & TECH