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Monodisperse hollow structure blue TiO2 material and preparation method

A hollow structure, monodisperse technology, applied in the direction of titanium oxide/hydroxide, titanium dioxide, etc., can solve the problems of affecting the presentation effect of things, restricting large-scale use, confusing color matching, etc., to overcome the complex preparation and small scale, Good stability and easy operation

Active Publication Date: 2018-04-03
CHANGSHU INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the complex preparation process of the periodic structure severely limits its large-scale use, and the design of multi-color structural colors is affected by the viewing angle. Different viewing angles have different color performances, which can easily lead to confusion in color matching and affect things. rendering effect

Method used

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  • Monodisperse hollow structure blue TiO2 material and preparation method
  • Monodisperse hollow structure blue TiO2 material and preparation method

Examples

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Effect test

Embodiment 1

[0028] A monodisperse blue TiO with hollow structure 2 The preparation method of material comprises the following steps:

[0029] Step 1, a certain amount of tetraethyl orthosilicate is mixed with absolute ethanol and deionized water and stirred evenly, the volume ratio of ethanol to tetraethyl orthosilicate is 26:1, deionized water and tetraethyl orthosilicate The volume ratio is 5:1;

[0030] Step 2, add a certain amount of concentrated ammonia water (concentration 26-28%) to step 1, the volume ratio of concentrated ammonia water to tetraethyl orthosilicate is 0.75:1, stir for 4 hours and then centrifuge and wash and separate;

[0031] Step 3, the SiO obtained in step 2 2 Dispersed in an appropriate amount of absolute ethanol for subsequent use, the volume ratio of the volume of absolute ethanol to tetraethyl orthosilicate described in step 1 is 23:1;

[0032] Step 4, to the SiO in step 3 2 Add a certain volume of acetonitrile and an appropriate amount of hydroxypropyl c...

Embodiment 2

[0037] A monodisperse blue TiO with hollow structure 2 The preparation method of material comprises the following steps:

[0038] Step 1, mix and stir a certain amount of tetraethyl orthosilicate with absolute ethanol and deionized water, the volume ratio of ethanol to tetraethyl orthosilicate is 20:1, deionized water and tetraethyl orthosilicate The volume ratio is 4:1;

[0039] Step 2, add a certain amount of concentrated ammonia water (concentration 26-28%) to step 1, the volume ratio of concentrated ammonia water to tetraethyl orthosilicate is 0.77:1, centrifuge and wash and separate after stirring for 4 hours;

[0040] Step 3, the SiO obtained in step 2 2 Dispersed in an appropriate amount of absolute ethanol for subsequent use, the volume ratio of the volume of absolute ethanol to tetraethyl orthosilicate described in step 1 is 23:1;

[0041] Step 4, to the SiO in step 3 2 Add a certain volume of acetonitrile and an appropriate amount of hydroxypropyl cellulose to th...

Embodiment 3

[0046] A monodisperse blue TiO with hollow structure 2 The preparation method of material comprises the following steps:

[0047] Step 1, mix and stir a certain amount of tetraethyl orthosilicate with absolute ethanol and deionized water, the volume ratio of ethanol to tetraethyl orthosilicate is 25:1, deionized water and tetraethyl orthosilicate The volume ratio is 6:1;

[0048] Step 2, add a certain amount of concentrated ammonia water (concentration 26-28%) to step 1, the volume ratio of concentrated ammonia water to tetraethyl orthosilicate is 0.73:1, centrifuge and wash and separate after stirring for 4 hours;

[0049] Step 3, the SiO obtained in step 2 2 Dispersed in an appropriate amount of absolute ethanol for subsequent use, the volume ratio of the volume of absolute ethanol to tetraethyl orthosilicate described in step 1 is 23:1;

[0050] Step 4, to the SiO in step 3 2 Add a certain volume of acetonitrile and an appropriate amount of hydroxypropyl cellulose to th...

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Abstract

The invention discloses a monodisperse hollow structure blue TiO2 material and a preparation method. The hollow structure blue TiO2 material has the inner diameter of 200-230 nm and the shell thickness of 15-25 nm, is uniform in size distribution and is monodisperse. A SiO2 spherical template is synthesized with tetraethyl orthosilicate as a precursor and ammonia water as a catalyst, the outer surface of the SiO2 spherical template is coated with a TiO2 shell, the SiO2 template is removed through high-temperature treatment in an inert atmosphere and sodium hydroxide solution etching, and the blue TiO2 material caused by the Mie scattering resonance phenomenon of the hollow structure can be obtained. The used method is simple to operate, raw materials are easy to obtain, large-scale synthesis can be realized, the Mie scattering resonance color of the hollow structure is not affected by the observation angle and the hollow structure is bright blue.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and the invention relates to a monodisperse hollow structure blue TiO 2 Materials and their preparation methods. Background technique [0002] Color plays an important role in modern multimedia. Recently, the structural color produced by the interaction of light and nanostructures has attracted extensive attention due to its excellent stability. For example, periodically arranged photonic crystals exhibit bright colors that arise from coherent Bragg diffraction of special periodic structures rather than from conventional absorption mechanisms. [0003] However, the complex preparation process of the periodic structure severely limits its large-scale use, and the design of multi-color structural colors is affected by the viewing angle. Different viewing angles have different color performances, which can easily lead to confusion in color matching and affect things. rendering effect....

Claims

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Application Information

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IPC IPC(8): C01G23/053
CPCC01G23/053C01P2004/04C01P2004/34C01P2004/62
Inventor 姚霞喜胡秀丽王旭红穆加成张景怡戴晟毅王哲飞
Owner CHANGSHU INSTITUTE OF TECHNOLOGY
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