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Organic porous material containing graphite phase c3n4 structure, its preparation and application

A porous material, C3N4 technology, used in organic compound/hydride/coordination complex catalysts, hydrogen production, inorganic chemistry, etc., can solve the problems of low specific surface area, single energy band structure, etc. The effect of simple process and good application prospect

Active Publication Date: 2019-05-31
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] In view of the above defects or improvement needs in the prior art, the present invention provides a graphite phase C 3 N 4 The organic porous material of structure, its preparation method and application, its purpose is to use 1,3,5-trialdehyde group phloroglucinol (Tp) as aldehyde group building unit, with triamino-three-triazine hexacyclic ( melem) is an amino building block, and can also contain aromatic rings, heterocyclic rings or condensed rings of binary or multi-amino groups at the same time, and a Schiff base reaction occurs to prepare a graphite phase C 3 N 4 The structure has organic porous materials with high specific surface area and controllable energy band structure, thus solving the graphite phase C of the prior art 3 N 4 Technical problems of low specific surface area and single energy band structure

Method used

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  • Organic porous material containing graphite phase c3n4 structure, its preparation and application
  • Organic porous material containing graphite phase c3n4 structure, its preparation and application
  • Organic porous material containing graphite phase c3n4 structure, its preparation and application

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preparation example Construction

[0049] The preparation method of the above-mentioned organic porous material comprises the following steps: using 1,3,5-trialdehyde phloroglucinol (Tp) as an aldehyde group building unit, and using triamino-three-triazolidine ring (melem) as an amino building block The unit is obtained by adding an organic solvent and undergoing a Schiff base reaction and then purifying by methanol or tetrahydrofuran by Soxhlet. The molar ratio of aldehyde group to amino group is 2:0.8~2.2; the ratio of aldehyde group to amino group is too high or too low, resulting in the inability to form complete pores, the reaction temperature is 80~150°C; the reaction time is 12~48h.

[0050] Wherein the amino structural unit may also include one or more dibasic or polybasic amino compounds. The dibasic or polybasic amino compound is an aromatic ring, heterocyclic or condensed ring compound of dibasic or polybasic amino groups. The dibasic or polyaminoaromatic compound is preferably tris(4-aminophenyl)am...

Embodiment 1

[0055] Triamino-tri-triazol (melem) (0.0436 g, 0.2 mmol), 1,3,5-trialdehyde phloroglucinol (0.084 g, 0.4 mmol) and 2,4,6-tri( 4-Aminophenyl)-1,3,5-triazine (0.0709 g, 0.2 mmol) was added to a solvent of 5 mL DMSO. React at 150°C for 12h. First react at 80°C for 6h, then raise the temperature to 120°C for 12h. After the reaction was completed, filter with suction and wash with methanol to remove residual oligomers and the like. The solid was collected and dried under vacuum to obtain 0.173 g of black powder with a yield of 98%.

[0056] attached figure 1 It is the Fourier transform infrared spectrogram of the organic porous material prepared in embodiment 1, and the material structural formula is as shown in (1), wherein R 1 to R 6 Each is independently a triazahexacyclyl group represented by formula (6) or a 2,4,6-tris(4-phenyl)-1,3,5-triazinyl group represented by formula (2). Its building block melem is located at 3344cm -1 and 3097cm -1 The amino characteristic peak...

Embodiment 2

[0063] Add 1,3,5-trialdehydephloroglucinol (0.042 g, 0.2 mmol) and triamino-tri-triazol (melem) (0.0436 g, 0.2 mmol), to 5 mL of dimethylformamide in the solvent. React at 80°C for 12h. After the reaction is complete, filter with suction and wash with methanol to remove residual oligomers and the like. The solid was collected and dried under vacuum to obtain 0.060 g of black powder with a yield of 40%.

[0064] attached Figure 10 It is the Fourier transform infrared spectrogram of the organic porous material prepared in Example 2. The material structural formula is shown in (1), wherein R 1 to R 6 All are triazahexacyclyls shown in formula (6). It can be seen from the figure that the building unit melem is located at 3344cm -1 and 3097cm -1 The amino characteristic peak at disappears; 1,3,5-trialdehyde phloroglucinol is located at 2894cm -1 The carbon-hydrogen bond characteristic peak at 1645cm -1 The characteristic peak of the carbonyl at the disappearance indicates...

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Abstract

The invention belongs to the technical fields of new material preparation and photocatalysis, and specifically relates to a method containing graphite phase C 3 N 4 Structured organic porous materials, their preparation methods and their applications in the field of photocatalysis. It is prepared by a Schiff base reaction using 1,3,5-trialdehyde phloroglucinol (Tp) as the aldehyde building unit and triamino-tri-triazahexane (melem) as the amino building unit. Contains graphite phase C 3 N 4 Structured organic porous materials with high specific surface area and controllable energy band structure, compared to graphite phase C 3 N 4 , the specific surface area is greatly improved; and the energy band structure can be adjusted through the adjustment of monomers; the material has a wide visible light absorption range, has obvious photocatalytic degradation activity for organic pollutants in water, and can also be used for Catalytic decomposition of water to produce hydrogen under visible light; the method has mild conditions and the resulting material has stable properties and is suitable for large-scale production applications.

Description

technical field [0001] The invention belongs to the technical field of new material preparation and photocatalysis, in particular to a graphite phase C 3 N 4 Preparation of structured organic porous materials and their applications in photocatalysis. Background technique [0002] How to efficiently convert abundant solar energy into chemical energy is a problem that people have been working hard to solve. Photocatalysts have attracted a lot of attention since the discovery that titanium dioxide can split water to produce hydrogen and oxygen in the presence of ultraviolet light. At present, as far as inorganic materials are concerned, with d 0 or d 10 The electronic structures of transition metal oxides, nitrides and sulfides are most widely studied. However, because titanium dioxide can only absorb ultraviolet light, and transition metals are expensive, it has not been able to efficiently use visible light in sunlight. [0003] In 2009, it was confirmed for the first t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/02B01J35/10C08G83/00C01B3/04C02F1/30C02F101/30
CPCC01B3/042C02F1/30C08G83/008C02F2305/10C02F2101/30C01B2203/1088C01B2203/0277B01J35/39B01J35/613B01J35/618B01J35/617B01J35/615Y02E60/36
Inventor 金尚彬郭莉萍谭必恩潘军全王宁
Owner HUAZHONG UNIV OF SCI & TECH
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