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PDI supramolecular photocatalyst and preparation method and use method thereof

A photocatalyst and supramolecular technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, etc. Low cost and high yield

Active Publication Date: 2020-08-25
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the traditional water treatment process is difficult to discharge this type of organic wastewater up to the standard, and finding an efficient and stable organic wastewater treatment technology has become an urgent problem

Method used

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  • PDI supramolecular photocatalyst and preparation method and use method thereof
  • PDI supramolecular photocatalyst and preparation method and use method thereof
  • PDI supramolecular photocatalyst and preparation method and use method thereof

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Experimental program
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Effect test

Embodiment 1

[0030] The PDI supramolecular photocatalyst of this embodiment, the supramolecular photocatalyst is self-assembled PDI activated persulfate system under visible light, the mass ratio of self-assembled PDI and persulfate is 25:17.9.

[0031] The preparation method of the PDI supramolecular photocatalyst of the present embodiment comprises the steps:

[0032] S1. According to the mass ratio of 1:1.8:10, perylene-3,4,9,10-tetracarboxylic dianhydride, β-alanine and imidazole were placed in a four-necked flask under a nitrogen atmosphere at a temperature of 100°C for organic Synthesis, adding ethanol and HCl in a mass ratio of 150:18 and stirring to obtain a stirred product;

[0033] S2. Filtrating and washing the stirred product to neutrality and drying to obtain PDI powder, wherein the pore size of the filter membrane is 0.22 μm, and the drying temperature is 50° C.;

[0034] S3. Prepare 50mL 1.25M PDI stock solution, add 209μL triethylamine, stir for 30min, then add 1mL 4MHNO ...

Embodiment 2

[0037] The PDI supramolecular photocatalyst of this embodiment, the supramolecular photocatalyst is self-assembled PDI activated persulfate system under visible light, the mass ratio of self-assembled PDI and persulfate is 50:35.8.

[0038] The preparation method of the PDI supramolecular photocatalyst of the present embodiment comprises the steps:

[0039] S1. According to the mass ratio of 1:1.8:15, perylene-3,4,9,10-tetracarboxylic dianhydride, β-alanine and imidazole were placed in a four-necked flask under a nitrogen atmosphere at a temperature of 110°C for organic Synthesis, adding ethanol and HCl in a mass ratio of 160:18 and stirring to obtain a stirred product;

[0040] S2. Filtrating and washing the stirred product to neutrality and drying to obtain PDI powder, wherein the pore size of the filter membrane is 0.45 μm, and the drying temperature is 70° C.;

[0041] S3. Prepare 50mL 1.25M PDI stock solution, add 209μL triethylamine, stir for 45min, then add 3mL 4MHNO ...

Embodiment 3

[0044] The PDI supramolecular photocatalyst of this embodiment, the supramolecular photocatalyst is self-assembled PDI activated persulfate system under visible light, the mass ratio of self-assembled PDI and persulfate is 35:25.1.

[0045] The preparation method of the PDI supramolecular photocatalyst of the present embodiment comprises the steps:

[0046] S1. According to the mass ratio of 1:1.8:12, perylene-3,4,9,10-tetracarboxylic dianhydride, β-alanine and imidazole were placed in a four-necked flask under a nitrogen atmosphere at a temperature of 105°C for organic Synthesizing, adding ethanol and HCl in a mass ratio of 155:18 and stirring to obtain a stirred product;

[0047] S2. Filtrating and washing the stirred product to neutrality and drying to obtain PDI powder, wherein the pore size of the filter membrane is 0.30 μm, and the drying temperature is 60° C.;

[0048] S3. Prepare 50mL of 1.25M PDI stock solution, add 209μL of triethylamine, stir for 60min, then add 5m...

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Abstract

The invention discloses a PDI supermolecular photocatalyst and a preparation method and a use method thereof. The supramolecular photocatalyst is a self-assembled PDI activated persulfate system undervisible light. Mass ratio of self-assembled PDI to persulfate is 25-50: 1 17.9 35.8. Perylene-3, 4, 9, 10-tetracarboxylic acid, beta-alanine and imidazole are used as raw materials, PDI is obtainedby an organic synthesis method, the self-assembled PDI is obtained through acidification, the obtained self-assembled PDI is put into a solution for illumination by using xenon lamp, sodium persulfateis added at the moment, and the PDI supermolecular photocatalyst is obtained after mixing. The invention also provides a use method of the PDI supermolecular photocatalyst. The PDI supermolecular photocatalyst prepared through the preparation method is simple in preparation process and large in yield, and under the condition that metal elements are not introduced, the system can conduct efficientcatalytic degradation on organic micropollutants in water.

Description

technical field [0001] The invention relates to a supramolecular photocatalyst, a preparation method and a use method thereof, in particular to a PDI supramolecular photocatalyst, a preparation method and a use method thereof, and belongs to the field of wastewater treatment. Background technique [0002] PDI is an n-type organic semiconductor that can absorb visible light due to its narrow bandgap (~1.69eV). PDI can form ordered π-π stacks and hydrogen bond structures through molecular self-assembly. Self-assembled PDIs have better photocatalytic activity than bulk PDIs due to shorter electron transport channels and red-shifted absorption sidebands. Most of the inventions on PDI are about constructing heterojunction photocatalysts that hinder the recombination of electrons and holes to enhance photocatalytic performance. Persulfate (Persulphate, PS) is a white, odorless, water-soluble inorganic compound and a stable acidic oxidant. The O-O bond energy in PS is 140KJ / mol,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/06B01J35/02C02F1/30C02F1/72C08G83/00C02F101/34C02F101/36B01J35/00
CPCB01J31/06C08G83/008C02F1/30C02F1/725C02F2305/10C02F2101/345C02F2101/36C02F2305/023B01J35/39B01J35/40
Inventor 何欢季秋忆张利民徐哲杨绍贵武怡洁向伟铭吴星悦李时银
Owner NANJING NORMAL UNIVERSITY
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