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A kind of preparation method of sio2-batio3 double size colloidal crystal

A sio2-batio3, colloidal crystal technology, applied in chemical instruments and methods, silica, inorganic chemistry, etc., can solve the problems of material limitations, complex process equipment, and high cost

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 preparation methods of colloidal crystals mainly include microfabrication and self-assembly methods. The microfabrication method can process various materials and form various structures, but the process equipment is complicated and the cost is high; while the self-assembly method has simple process equipment and low cost. However, it has restrictions on materials, and it is impossible to obtain complete bandgap materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A SiO 2 -BaTiO 3 The preparation method of double-size colloidal crystal comprises the following steps:

[0016] (1) Prepare a LiCl aqueous solution with a mass concentration of 0.1%, and prepare an ethanol solution A of tetraethyl orthosilicate and an ethanol solution B of ammonia respectively, 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 2.5:1, and then 2mL of LiCl aqueous solution is added to solution B, and the volume ratio of LiCl 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 particles;

[0017] (2) Weighing SiO2 2 Nanoparticles, ultrasonically dispe...

Embodiment 2

[0021] A SiO 2 -BaTiO 3 The preparation method of double-size colloidal crystal comprises the following steps:

[0022] (1) Prepare a LiCl aqueous solution with a mass concentration of 0.15%, and prepare an ethanol solution A of tetraethyl orthosilicate and an ethanol solution B of ammonia respectively, 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 14.3:1, the volume ratio of the amount of ammonia water to tetraethyl orthosilicate is 3.5:1, and then 3.5mL of LiCl aqueous solution is added to solution B, and the volume ratio of LiCl aqueous solution to ammonia water is 1:5 , and then add solution A to solution B under constant stirring. After 22 hours of reaction, the precipitate is separated, washed by centrifugation and dried at 60°C to obtain surface-modified SiO 2 nanosphere particles;

[0023] (2) Weighing SiO2 2 Nanoparticles, which were ultrasonic...

Embodiment 3

[0027] A SiO 2 -BaTiO 3 The preparation method of double-size colloidal crystal comprises the following steps:

[0028] (1) Prepare a LiCl aqueous solution with a mass concentration of 0.125%, and prepare an ethanol solution A of tetraethyl orthosilicate and an ethanol solution B of ammonia respectively, 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 2.85:1, and then 2mL of LiCl aqueous solution is added to solution B, the volume ratio of LiCl aqueous solution to ammonia water is 1:2.45, 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 particles;

[0029] (2) Weigh SiO2 2 Nanoparticles, ultrasonically dis...

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Abstract

The invention discloses a method for preparing a SiO2-BaTiO3 bimodal size colloidal crystal. According to the method, the periodic ordered SiO2-BaTiO3 bimodal size colloidal crystal structure is obtained; LiCl is added into a reaction system so as to carry out surface modification on silicon dioxide colloidal spheres, the modified silicon dioxide spherical particles are self assembled on a ITO glass substrate, barium titanate gels prepared are uniformly filled in the silicon dioxide colloidal crystal template through an immersion method and a double substrate injection method, and then the SiO2-BaTiO3 bimodal size colloidal crystal is obtained by drying and calcining.

Description

technical field [0001] The present invention relates to a SiO 2 -BaTiO 3 Preparation method of double-sized colloidal crystals. Background technique [0002] Photonic crystals are periodically arranged in one-dimensional, two-dimensional or three-dimensional directions by dielectric materials with different dielectric constants or refractive indices, so as to selectively inhibit or modulate the propagation of light of specific wavelengths. The role of materials, in which monodisperse colloidal spheres are arranged in a certain medium in a three-dimensional orderly structure called colloidal crystals. The preparation methods of colloidal crystals mainly include microfabrication and self-assembly methods. The microfabrication method can process various materials and form various structures, but the process equipment is complicated and the cost is high; while the self-assembly method has simple process equipment and low cost. However, it has limitations on materials, and it ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/12C01G23/00C03C17/34
Inventor 伍媛婷王秀峰沈清
Owner SHAANXI UNIV OF SCI & TECH