Organic porous material with graphite phase C3N4 structure as well as preparation and application of organic porous material

A porous material, C3N4 technology, applied in water/sludge/sewage treatment, organic compound/hydride/coordination complex catalyst, hydrogen production, etc., can solve the problems of low specific surface area and single energy band structure, etc. Achieve the effect of increased specific surface area, simple process and rapid degradation

Active Publication Date: 2018-02-13
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 Structured organic porous material, its preparation method and application, its purpose is to use 1,3,5-trialdehyde group phloroglucinol (Tp) as the aldehyde group building unit, with triamino-three-triazine hexacyclic ( melem) is an amino building unit, 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 is performed 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 with graphite phase C3N4 structure as well as preparation and application of organic porous material
  • Organic porous material with graphite phase C3N4 structure as well as preparation and application of organic porous material
  • Organic porous material with graphite phase C3N4 structure as well as preparation and application of organic porous material

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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 field of new material preparation and photocatalysis, and in particular relates to an organic porous material with a graphite phase C3N4 structure, a preparationmethod of the organic porous material, and application of the organic porous material in the field of photocatalysis. The organic porous material, which has the graphite phase C3N4 structure and is large in specific surface area and adjustable in energy band structure, is prepared by enabling an aldehyde group building unit and an amino group building unit to be subjected to Schiff base reaction,wherein 1,3,5-trialdehyde phloroglucinol (Tp) is taken as the aldehyde group building unit, and triamino-tris-triazines (melem) is taken as the amino group building unit; compared with graphite phaseC3N4, the organic porous material has a greatly enlarged specific surface area; furthermore, the energy band structure can be regulated by means of monomer regulation. The material provided by the invention has a very wide visible light absorption range, has obvious photocatalytic degradation activity for organic pollutants in water, and is also used in catalytic decomposition of water for hydrogen production under visible light at the same time; the method is mild in conditions, and the obtained material is stable in performance and suitable for large-scale production and application.

Description

technical field [0001] The invention belongs to the field of new material preparation and photocatalysis technology, 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/02B01J35/10C08G83/00C01B3/04C02F1/30C02F101/30
CPCB01J35/004B01J35/1014B01J35/1019B01J35/1023B01J35/1028C01B3/042C01B2203/0277C01B2203/1088C02F1/30C02F2101/30C02F2305/10C08G83/008Y02E60/36
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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