Porous covalent triazine framework hollow microsphere as well as preparation method and application thereof

A technology of covalent triazine and framework, applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc. The ball is not an independent hollow structure, etc., to achieve the effect of flexible and controllable preparation method, low collapse rate, and high photocatalytic hydrogen production performance

Active Publication Date: 2019-04-16
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the above defects or improvement needs of the prior art, the present invention provides a porous covalent triazine framework hollow microsphere, its preparation method and application, which can obtain stable structure, high collapse rate Porous covalent triazine frame hollow microspheres with low and independent

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  • Porous covalent triazine framework hollow microsphere as well as preparation method and application thereof
  • Porous covalent triazine framework hollow microsphere as well as preparation method and application thereof
  • Porous covalent triazine framework hollow microsphere as well as preparation method and application thereof

Examples

Experimental program
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Example Embodiment

[0052] The preparation method of porous covalent triazine frame hollow microspheres provided by the present invention includes the following steps:

[0053] (1) Preparation of seed core-shell structure: Mix the dibasic or multibasic aldehyde group or benzyl alcohol monomer and dibasic or multibasic amidine group monomer, and disperse in the template suspension. Under the condition of the catalyst, the monomer The polycondensation reaction occurs according to the stoichiometric molar ratio, the aldehyde functional group and the amidino functional group undergo a polycondensation reaction according to 1:2, and the benzyl alcohol functional group and the amidino functional group also undergo a polycondensation reaction according to 1:2. The reaction temperature is controlled, and the seed is prepared after the reaction. A suspension of a core-shell structure; the shell layer of the seed core-shell structure is a prepolymer of a binary or multiple aldehyde group or benzyl alcohol mono...

Example Embodiment

[0073] Example 1

[0074] Prepare porous covalent triazine frame hollow microspheres, according to figure 2 Schematic diagram of the steps shown:

[0075] Follow the steps below to prepare the target product

[0076] (1) Prepare a suspension with a concentration of 12.5g / L using amino-modified silica as a template

[0077] Dissolve 1.25g of amino-modified silica in 100ml of dimethyl sulfoxide and sonicate at room temperature until the dispersion is uniform;

[0078] (2) Preparation of prefabricated seed suspension

[0079] Dissolve 0.008g of terephthalaldehyde in the above solutions and stir at 100°C for 12h;

[0080] Then add 0.028g of amidine salt and 0.120g of cesium carbonate to the above reaction system, and react at 100°C for 12h;

[0081] (3) Preparation of target core-shell structure complex

[0082] 0.0592g of terephthalaldehyde was added to the suspension prepared in step (2), and reacted at 100°C for 12h;

[0083] Then, 0.2072 g of amidine and 0.580 g of cesium carbonate were add...

Example Embodiment

[0096] Example 2

[0097] Follow the steps below to prepare the target product

[0098] (1) Prepare a suspension with a concentration of 7.5g / L with amino-modified silica as a template

[0099] Dissolve 0.75g of amino-modified silica in 100ml of dimethyl sulfoxide, sonicate at room temperature until the dispersion is uniform;

[0100] (2) Preparation of prefabricated seed suspension

[0101] Dissolve 0.008g of terephthalaldehyde in the above solutions and stir at 100°C for 12h;

[0102] Then add 0.028g of amidine salt and 0.120g of cesium carbonate to the above reaction system, and react at 100°C for 12h;

[0103] 0.0592g of terephthalaldehyde was added to the suspension prepared in step (2), and reacted at 100°C for 12h;

[0104] Then, 0.2072 g of amidine and 0.580 g of cesium carbonate were added to the above reaction system and reacted at 100° C. for 12 hours.

[0105] (3) Post-processing

[0106] First wash with deionized water twice, each wash for 4-5 hours, and then suction filtration;...

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Abstract

The invention belongs to the technical field of photocatalytic application of new materials, and particularly relates to a porous covalent triazine framework hollow microsphere as well as a preparation method and application thereof, a hard template stepwise polycondensation method is adopted to prepare the porous covalent triazine framework hollow microsphere with stable structure, low collapse rate and independent hollow structure, the porous covalent triazine framework hollow microsphere has excellent photocatalytic hydrogen production performance when being applied to visible light catalytic hydrogen production, thereby solving the technical problems that the covalent triazine framework hollow microsphere is not an independent hollow structure and the hydrogen production rate is poor in the prior art.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic application of new materials, and in particular relates to a porous covalent triazine frame hollow microsphere, its preparation method and application. Background technique [0002] Porous hollow microsphere is a kind of microsphere whose shell is composed of porous material and the inner cavity is a spherical cavity. Porous materials are divided into micropores (1-2nm), mesoporous (2-50nm), and macropores (>50nm). The material is used as the shell of hollow microspheres, which can provide porous channels connecting the outside world and the interior of the spheres, improving mass transfer efficiency. Moreover, the porous hollow microsphere has two layers of interfaces, the inner and outer layers, so more active sites are exposed and the reaction efficiency is higher. Among them, porous polymer hollow microspheres have the advantages of low density, thermal insulation, and good light s...

Claims

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Application Information

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IPC IPC(8): C07D487/22B01J31/02B01J35/10C01B3/04
CPCB01J31/0244B01J35/004B01J35/008B01J35/1095B01J37/0018C01B3/042C01B2203/0277C01B2203/1041C07D487/22Y02E60/36
Inventor 金尚彬王宁谭必恩程光
Owner HUAZHONG UNIV OF SCI & TECH
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