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Three-dimensional ordered macroporous titanate and in-situ self-sacrificial preparation method thereof

A three-dimensional ordered, porous titanate technology, applied in separation methods, chemical instruments and methods, catalyst activation/preparation, etc., can solve the problems of large product shrinkage, incomplete pore structure, low filling rate, etc. The effect of simple process, low equipment requirements and high filling rate

Inactive Publication Date: 2018-12-14
INST OF EARTH ENVIRONMENT CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide a three-dimensional ordered macroporous titanate and its in-situ self-sacrificing preparation method, which avoids the process of synthesizing titanate precursor solution and overcomes the problem of titanate The viscosity of the precursor solution is low, which easily leads to disadvantages such as low filling rate, incomplete pore structure of the material, and large shrinkage of the product.

Method used

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  • Three-dimensional ordered macroporous titanate and in-situ self-sacrificial preparation method thereof
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  • Three-dimensional ordered macroporous titanate and in-situ self-sacrificial preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0050] (1) Prepare monodisperse PS microspheres by dispersion polymerization, self-assemble PS microspheres into PS colloidal crystal templates by centrifugation, and dry them at 70°C;

[0051] (2) Isopropyl titanate is directly used as solution A;

[0052] (3) Soak the PS colloidal crystal template in methanol solution first, place it in a vacuum drying oven, and keep it at a vacuum degree of 20.133kPa for 20min; then take it out and filter out the methanol solution, and immediately fill it with methanol solution The PS colloidal crystal template is placed in solution A, and it is also placed in a vacuum oven and kept at a vacuum degree of 20.133kPa for 30min. Finally, it is taken out and the isopropyl titanate is filtered off, and the isopropyl titanate is filled with The ester PS colloidal crystal template was placed at room temperature for 12 hours to hydrolyze and gel the precursor solution isopropyl titanate in the structure;

[0053] (4) Calcining the PS colloidal crys...

Embodiment 2

[0058] (1) Prepare monodisperse PS microspheres by dispersion polymerization, self-assemble PS microspheres into PS colloidal crystal templates by centrifugation, and dry them at 70°C;

[0059] (2) directly use isopropyl titanate as solution A;

[0060] (3) Soak the PS colloidal crystal template in methanol solution first, place it in a vacuum drying oven, and keep it at a vacuum degree of 20.133kPa for 20min; then take it out and filter out the methanol solution, and immediately fill it with methanol solution The PS colloidal crystal template is placed in isopropyl titanate solution, and it is also placed in a vacuum drying oven and kept at a vacuum degree of 20.133kPa for 20min. Finally, it is taken out and the isopropyl titanate is filtered off, and the filled with The colloidal crystal template of isopropyl titanate was placed at room temperature for 12 hours to hydrolyze and gel the precursor solution in the structure;

[0061] (4) Calcining the PS colloidal crystal temp...

Embodiment 3

[0067] (1) Prepare monodisperse PS microspheres by dispersion polymerization, self-assemble PS microspheres into PS colloidal crystal templates by centrifugation, and dry them at 70°C;

[0068] (2) Mix tetraisopropyl titanate and absolute ethanol at a volume ratio of 1:1, and magnetically stir for 30 minutes to obtain a uniform solution A;

[0069] (3) Soak the PS colloidal crystal template in methanol solution first, place it in a vacuum drying oven, and keep it at a vacuum degree of 30.133kPa for 30min; then take it out and filter out the methanol solution, and then immediately fill it with methanol solution The PS colloidal crystal template is placed in solution A, and it is also placed in a vacuum oven and kept at a vacuum degree of 30.133kPa for 30min. Finally, it is taken out and solution A is filtered out, and the PS colloidal crystal template filled with solution A Place at room temperature for 24 hours to hydrolyze and gel the precursor solution in the structure;

[...

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Abstract

The invention provides a three-dimensional ordered macroporous titanate and an in-situ self-sacrificial preparation method thereof. The preparation method comprises the following steps: step 1, preparing a monodisperse microsphere colloidal crystal template; step 2, preparing a titanium dioxide precursor; step 3, adding the colloidal crystal template into the titanium dioxide precursor, placing the titanium dioxide precursor filled with the colloidal crystal template under a vacuum condition for dipping, taking out the titanium dioxide precursor filled with the colloidal crystal template, andcarrying out filtering and standing; step 4, calcining the colloidal crystal template filled with the titanium dioxide precursor in an air atmosphere to obtain three-dimensional ordered macroporous titanium dioxide; and step 5, placing the three-dimensional ordered macroporous titanium dioxide in a metal ion solution which shows alkalinity, and carrying out a hydrothermal reaction to obtain the three-dimensional ordered macroporous titanate. According to the invention, firstly, the three-dimensional ordered macroporous titanium dioxide is prepared, and then the three-dimensional ordered macroporous titanium dioxide is converted into the three-dimensional ordered macroporous titanate, so that a process of synthesizing a titanate precursor solution is avoided, and the disadvantages of low filling rate, incomplete pore structure of a material, large product shrinkage ratio and the like caused by low viscosity of the titanate precursor solution are overcome.

Description

technical field [0001] The invention belongs to the fields of nanometer material science and photocatalytic chemistry, and specifically relates to a three-dimensional ordered macroporous titanate and an in-situ self-sacrificing preparation method thereof. Background technique [0002] With the development of society, the consumption of fossil energy is increasing day by day, which brings convenience to people's life and causes serious pollution to the environment on which human beings depend, such as nitrogen oxides (NO x ), sulfide (SO x ), VOC and other organic volatile gases pollute the atmospheric environment and endanger human health. With the development of photocatalytic technology, photocatalytic technology has become one of the effective means for environmental restoration, water and air purification. [0003] Three-dimensional ordered macroporous materials have become a research hotspot in the field of new materials due to their unique advantages. Three-dimension...

Claims

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Application Information

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IPC IPC(8): B01J23/02B01J23/75B01J23/34B01J35/10B01J37/03B01J37/10B01J37/08B01D53/86B01D53/56
CPCB01D53/8628B01J23/002B01J23/02B01J23/34B01J23/75B01J37/0018B01J37/036B01J37/10B01J35/39B01J35/23B01J35/651
Inventor 黄宇卜彦强曹军骥
Owner INST OF EARTH ENVIRONMENT CHINESE ACAD OF SCI
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