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Titanium dioxide photonic crystal and preparation method thereof

A technology of photonic crystals and titanium dioxide, applied in optics, optical components, instruments, etc., can solve problems such as difficulty in obtaining a continuous photonic crystal structure, hindering the practical application of titanium dioxide photonic crystals, unfavorable environmental protection, etc., and achieves non-toxic and environmentally friendly sources and simple preparation methods Ease of control, possibility-enhancing effects

Active Publication Date: 2017-12-19
CHONGQING UNIV OF POSTS & TELECOMM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problems of this preparation method are: (1) in the drying and calcination process, it is difficult to avoid structural defects due to the shrinkage stress, so that the regular pore structure collapses into powder; (2) it is difficult to obtain a large-area continuous photonic crystal structure; (3) Calcination is required to remove a large amount of organic polymers, which is not conducive to environmental protection
These problems hinder the practical application of titanium dioxide photonic crystals

Method used

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  • Titanium dioxide photonic crystal and preparation method thereof
  • Titanium dioxide photonic crystal and preparation method thereof
  • Titanium dioxide photonic crystal and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1, the preparation method of titanium dioxide photonic crystal, comprises the steps:

[0037] (1) Preparation of reaction system solution

[0038] At first tetrabutyl orthotitanate and diethanolamine are mixed uniformly to obtain titanium source in the ratio of mass ratio 1:1.05; Then cetyltrimethylammonium bromide ( CTAB), n-butanol, water and cyclohexane are uniformly mixed to obtain a transparent reverse micellar microemulsion; the titanium source is added to the reverse micellar microemulsion in a mass ratio of 1:6.83 and mixed to obtain a transparent reaction system solution;

[0039] (2) Generate gel film

[0040] Coat the reaction system solution prepared in step (1) on a glass slide, and keep it warm at 110°C for 10 minutes to obtain a transparent gel film;

[0041] (3) Formation of photonic crystals

[0042] The gel film obtained in step (2) was calcined at 450° C. for 0.5 h to finally obtain titanium dioxide photonic crystals.

[0043] When preparing the r...

Embodiment 2

[0045]1, the preparation method of titanium dioxide photonic crystal, comprises the steps:

[0046] (1) Preparation of reaction system solution

[0047] First, tetrabutyl orthotitanate and diethanolamine are uniformly mixed to obtain a titanium source in a mass ratio of 1:2.5; then CTAB, n-butanol, water and cyclohexane are mixed in a mass ratio of 1:5:5:25 Mix evenly to obtain a transparent reverse micellar microemulsion; add the titanium source to the reverse micellar microemulsion in a mass ratio of 1:5 and mix to obtain a transparent reaction system solution;

[0048] (2) Generate gel film

[0049] Coat the reaction system solution prepared in step (1) on a glass slide, and keep it warm at 150°C for 15 minutes to obtain a transparent gel film;

[0050] (3) Formation of photonic crystals

[0051] The gel film obtained in step (2) was calcined at 600° C. for 12 hours to finally obtain titanium dioxide photonic crystals.

Embodiment 3

[0053] 1, the preparation method of titanium dioxide photonic crystal, comprises the steps:

[0054] (1) Preparation of reaction system solution

[0055] First, tetrabutyl orthotitanate and diethanolamine are uniformly mixed to obtain a titanium source in a mass ratio of 1:0.1; then CTAB, n-butanol, water and cyclohexane are mixed in a mass ratio of 1:1:1:1 Mix evenly to obtain a transparent reverse micellar microemulsion; add the titanium source to the reverse micellar microemulsion in a mass ratio of 1:1 and mix to obtain a transparent reaction system solution;

[0056] (2) Generate gel film

[0057] Coat the reaction system solution prepared in step (1) on a glass slide, and keep it warm at 50°C for 1 min to obtain a transparent gel film;

[0058] (3) Formation of photonic crystals

[0059] The gel film obtained in step (2) was calcined at 400° C. for 0.5 h to finally obtain titanium dioxide photonic crystals.

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Abstract

The invention discloses a titanium dioxide photonic crystal and a preparation method thereof. The preparation method includes: firstly, evenly mixing a titanium salt with a hydrolysis inhibitor to obtain a titanium source, evenly mixing a surfactant, a surfactant auxiliary, water and oil to obtain transparent reversed micelle microemulsion, and adding the titanium source into the reversed micelle microemulsion with mixing so as to obtain a transparent reaction system solution; then, coating a solid substrate with the transparent reaction system solution and holding for 1-30 minutes at 50-200 DEG C so as to obtain a transparent gel film; finally, subjecting the transparent gel film to roasting for 0.5-24 hours at 400-800 DEG C so as to obtain the titanium dioxide photonic crystal. The preparation method has the remarkable advantages of simple and controllable preparation technologies, benefit to obtaining large-area continuous photonic crystal structures, low cost, environment friendliness and the like.

Description

technical field [0001] The invention relates to the technical field of photonic crystals, in particular to a titanium dioxide photonic crystal and a preparation method thereof. Background technique [0002] A photonic crystal is a material similar to a semiconductor, which has the characteristic of a photonic band gap, that is, photons whose energy is within the photonic band gap cannot propagate in a photonic crystal. The special properties of photonic crystals for the selective propagation of light make them widely used in high-efficiency photon-conducting materials (such as optical fibers, laser resonators, light-emitting diodes, etc.), new building materials (such as photonic crystal exterior walls, photonic crystal glass, etc.) with broadly application foreground. [0003] The reason why photonic crystals have the special property of selective propagation of light waves is that their internal structure is periodically arranged by media with different refractive indices...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B1/00
CPCG02B1/005
Inventor 唐笑吴婷林景诚楚婉怡
Owner CHONGQING UNIV OF POSTS & TELECOMM