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Preparation method of ordered macroporous materials with titanium dioxide inverse opal structures

An inverse opal structure, titanium dioxide technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of low degree of order, complex preparation process, and many impurities in materials, and achieve high degree of order, good uniformity, The effect of less impurities

Inactive Publication Date: 2012-02-01
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of low degree of order, many impurities in the material, and complicated preparation process in the above-mentioned prior art, the object of the present invention is to provide a titanium dioxide inverse opal organic compound with high order degree, low impurity content and simple preparation method. Preparation method of sequenced macroporous material

Method used

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  • Preparation method of ordered macroporous materials with titanium dioxide inverse opal structures
  • Preparation method of ordered macroporous materials with titanium dioxide inverse opal structures
  • Preparation method of ordered macroporous materials with titanium dioxide inverse opal structures

Examples

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example 1

[0034] Method operation steps of the present invention are as follows:

[0035] Step 1): Using soap-free emulsion polymerization method, polystyrene monomer is used as raw material to prepare PS microspheres;

[0036] The specific steps are: A) Take 100ml of deionized water and add it to a 250ml four-necked flask, and pass nitrogen gas (N 2 ) for 30min to remove the air in the bottle. Then put it into a constant temperature tank, slowly heat up to 60°C, and keep it at a constant temperature for 10 minutes; B) Add 6ml of styrene to the flask under constant temperature in step A); then raise the temperature to 70°C, keep at a constant temperature for 5 minutes, C) to a constant temperature of 70 10ml of an aqueous solution containing 0.2g of potassium peroxodisulfate used as an initiator and MAA as a surface modifier ( Methacrylic acid) 1.2g, after fully reacting for 24 hours under nitrogen protection, the original dispersion of PS microspheres was obtained; D) Put the origin...

example 2

[0044] The operation of this example is basically the same as that of Example 1, the difference lies in:

[0045] In step 1), add 12ml of styrene to the flask under constant temperature in step A); D) The centrifugal washing time in step is 20min; after taking it out, put it into an ultrasonic cleaner for ultrasonic cleaning for 30min; E) Repeat step D ) 3 times to obtain the PS microspheres; take 12ml of PS microspheres and disperse them in a 30% ethanol solution to prepare a PS microsphere dispersion for use;

[0046] The substrate used in step 2) is a mica sheet, and the hydrophilic treatment step F) of the mica sheet is the same as in Example 1; when the PS microspheres are assembled by the vertical deposition method, the volume concentration of the PS microspheres in the beaker in step G) is 0.08% ; Step H) The constant temperature in the vacuum drying oven is 70°C and the humidity is 90%; after the hydrophilic treated mica sheet is vertically deposited in the PS microsph...

example 3

[0050] The operation of this example is basically the same as that of Example 1, the difference lies in:

[0051] In step 1), add 5ml of styrene to the flask under the constant temperature state in step A); D) the centrifugal washing time in step is 20min; after taking it out, put it into the ultrasonic cleaner for ultrasonic cleaning for 30min; E) repeat the steps D) 2 times to obtain the PS microspheres; take 8ml of PS microspheres and disperse them in an ethanol solution with a concentration of 30% to prepare a PS microsphere dispersion for use;

[0052] The substrate used in step 2) is a monocrystalline silicon wafer, and the hydrophilic treatment step F) of the monocrystalline silicon wafer is the same as in Example 1; when the PS microspheres are assembled by the vertical deposition method, the volume of the PS microspheres in the beaker in step G) The concentration is 0.10%; Step H) The constant temperature in the vacuum drying oven is 65°C and the humidity is 93%; afte...

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Abstract

The invention discloses a preparation method of ordered macroporous materials with titanium dioxide inverse opal structures, which comprises the following steps of: step 1, adopting an emulsifier-free emulsion polymerization method, preparing PS micro-balloons by taking a PS monomer as raw materials and dispersing the micro-balloons into ethanol solution to form PS micro-balloon dispersion liquid; step 2, utilizing the PS micro-balloon dispersion liquid in the step 1 to deposit and prepare a PS template with an opal structure by adopting a vertical deposition method under the conditions of constant temperature and constant humidity; step 3, preparing titanium tetrachloride hydrochloric acid solution, vertically immersing the PS template prepared in the step 2 into the titanium tetrachloride hydrochloric acid solution and heating to 70-90 DEG C, slowly filling hydrated titanium oxide on the PS temperate in a constant-temperature state and then taking out after 3-5 hours; and step 4, placing the PS template treated by the step 3 at a room temperature for drying, treating for 30 minutes at a high temperature and obtaining the ordered macroporous materials with the TiO2 inverse opal structures. Compared with the prior art, the prepared materials are uniform, have high order degree, less impurity and simple preparation process and are beneficial to popularization and implementation.

Description

technical field [0001] The invention relates to a method for preparing a titania inverse opal structure ordered macroporous material, belonging to the technical field of ordered pore structure materials and photonic crystal materials. Background technique [0002] Inverse opal structures are a large class of structures that are expected to achieve a complete photonic bandgap. As long as the ratio of the refractive index of the filled material to the surrounding medium (air) reaches a certain value, the periodic and symmetrical structure of this structure can have a complete photonic band gap, and this ordered macroporous material, It has the characteristics of small density, large specific surface area, and good controllable transformation. It is widely used in photonic crystals, photoelectric materials, catalyst carriers, molecular sieves and other fields. It almost involves all fields of photonic information industry and new material industry. For example, the presence of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/047
Inventor 彭同江王充段涛
Owner SOUTHWEAT UNIV OF SCI & TECH
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