monodisperse hollow structure green tio 2 Materials and Preparation Methods

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

Active Publication Date: 2019-12-27
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 green tio <sub>2</sub> Materials and Preparation Methods
  • monodisperse hollow structure green tio <sub>2</sub> Materials and Preparation Methods

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A monodisperse hollow structure green TiO 2 The preparation method of material comprises the following steps:

[0030] 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;

[0031] 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 0.0.87:1, stir for 4 hours, then centrifuge, wash and separate;

[0032] 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;

[0033] Step 4, to the SiO in step 3 2 Add a certain volume of acetonitrile and an appropriate amount of hydroxypropyl cellulos...

Embodiment 2

[0038] A monodisperse hollow structure green TiO 2 The preparation method of material comprises the following steps:

[0039] 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;

[0040] 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 0.85:1, centrifuge and wash and separate after stirring for 4 hours;

[0041] 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;

[0042] Step 4, to the SiO in step 3 2Add a certain volume of acetonitrile and an appropriate amount of hydroxypropyl cellulose to the sus...

Embodiment 3

[0047] A monodisperse hollow structure green TiO 2 The preparation method of material comprises the following steps:

[0048] 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;

[0049] 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 0.82:1, centrifuge and wash and separate after stirring for 4 hours;

[0050] 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;

[0051] Step 4, to the SiO in step 3 2 Add a certain volume of acetonitrile and an appropriate amount of hydroxypropyl cellulose to the su...

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Abstract

The invention discloses a green TiO2 material with a monodisperse hollow structure, and a preparation method. The internal diameter and shell thickness of the green TiO2 material with the hollow structure are respectively 250-280nm and 25-15nm, and size distribution is uniform and shows monodispersity. The preparation method comprises the following steps: by taking tetraethoxysilane as a precursorand ammonium hydroxide as a catalyst, synthesizing a SiO2 sphere template, coating the outer surface of the SiO2 sphere template with a TiO2 shell, and removing SiO2 template through high-temperaturetreatment in inert atmosphere and etching in sodium hydroxide solution, thus obtaining the green TiO2 material caused due to Mie scattering resonance phenomenon of the hollow structure. The method used is simple in operation processes, easily available in raw materials, and capable of performing large-range synthesis, and the color of the Mie scattering resonance of the hollow structure is not influenced by observation angles and is brightly green.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and the invention relates to a monodisperse hollow structure green 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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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/053B82Y40/00
CPCC01G23/053C01P2004/01C01P2004/04C01P2004/34C01P2004/62
Inventor 姚霞喜王旭红张兴昊李彬彬胡秀丽殷仕龙
Owner CHANGSHU INSTITUTE OF TECHNOLOGY
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