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Supermolecule heterojunction organic photocatalyst and preparation method and application method thereof

A technology of photocatalyst and application method, applied in the direction of organic compound/hydride/coordination complex catalyst, chemical instrument and method, physical/chemical process catalyst, etc., can solve the problem of large impact, difficult to degrade and process, corrosive carcinogenic In order to achieve the effects of easy large-scale production, practical operability, and mild preparation conditions

Active Publication Date: 2020-02-28
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, in the sewage produced by paper mills, dye manufacturing and oil refineries, phenol and its derivatives are an important class of toxic pollutants that are difficult to degrade and treat, which can pollute water bodies and the atmosphere, and Corrosive, carcinogenic, etc.
Traditional treatment methods include physical, chemical and biological methods, but physical methods are costly and cannot completely remove organic pollutants, chemical methods may cause secondary pollution, biological methods have a long cycle and are greatly affected by the surrounding environment

Method used

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  • Supermolecule heterojunction organic photocatalyst and preparation method and application method thereof
  • Supermolecule heterojunction organic photocatalyst and preparation method and application method thereof
  • Supermolecule heterojunction organic photocatalyst and preparation method and application method thereof

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Embodiment 1

[0044] The preparation method of the supramolecular heterojunction organic photocatalyst of the present embodiment, its steps are:

[0045] by NH 4 Cl and Bi(NO 3 ) 3 ·5H 2 The mass ratio of O is 1:8 to NH 4 The Cl solution was quickly added to the Bi(NO 3 ) 3 ·5H 2 O solution and continued to stir, the reaction system immediately turned into a white suspension. The suspension was poured into a 50 mL polytetrafluoroethylene autoclave, and subjected to a hydrothermal reaction at 140 °C for 12 hours. After the completion of the hydrothermal reaction, the powder was washed three times with deionized water and ethanol respectively, and the powder was vacuum-dried at 80°C, and calcined in an air atmosphere at 400°C for 5 hours to obtain a BiOCl sample, whose XRD pattern is as follows: figure 2 shown.

[0046]Perylene-3,4,9,10-tetracarboxylic dianhydride, β-alanine, and imidazole were placed in a four-neck flask at a mass ratio of 1:1.8:10 and heated at 110° C. for 4 hours ...

Embodiment 2

[0049] The preparation method of the supramolecular heterojunction organic photocatalyst of the present embodiment, its steps are:

[0050] The PDI prepared in Example 1 was used to prepare a 5 mM PDI stock solution, and the triethylamine solution was continuously added according to the mass ratio of triethylamine to PDI of 1:600. then press HNO 3 Add HNO at a mass ratio of 1:1 to PDI 3 to form PDI nanofibers. It was washed with distilled water until neutral, and the collected solid was dried under vacuum at 60 °C. Prepare a 5 mM PDI nanofiber stock solution and add triethylamine at a mass ratio of triethylamine to PDI of 1:600 ​​and keep stirring. BiOCl (500 mg) was added to the stock solution containing 500 mg of nanofiber PDI and stirred for 30 minutes, followed by sonication for 30 minutes. Heat the solution to 60 °C by water bath and press HNO 3 Add HNO at a mass ratio of 1:1 to PDI 3 and stirred for 1 hour. The red product was washed to neutral by centrifugation, ...

Embodiment 3

[0052] The preparation method of the supramolecular heterojunction organic photocatalyst of the present embodiment, its steps are:

[0053] by NH 4 Cl and Bi(NO 3 ) 3 ·5H 2 The mass ratio of O is 1:9 to NH 4 The Cl solution was quickly added to the Bi(NO 3 ) 3 ·5H 2 O solution and continued to stir, the reaction system immediately turned into a white suspension. The suspension was poured into a 50 mL polytetrafluoroethylene autoclave, and subjected to a hydrothermal reaction at 160 °C for 12 hours. After the completion of the hydrothermal reaction, the powder was washed three times with deionized water and ethanol, respectively, and the powder was vacuum-dried at 80 °C and calcined in an air atmosphere at 400 °C for 5 hours to obtain a BiOCl sample.

[0054] Perylene-3,4,9,10-tetracarboxylic dianhydride, β-alanine, and imidazole were placed in a four-neck flask at a mass ratio of 1:1.8:15 and heated at 100° C. for 4 hours under a nitrogen atmosphere. After the reactio...

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Abstract

The invention discloses a supermolecule heterojunction organic photocatalyst and a preparation method and an application method thereof. The photocatalyst is a BiOCl / PDI photocatalyst. Sheet shape BiOCl is prepared by a hydrothermal method; and perylene diimide (PDI) is synthesized by an organic synthesis method. BiOCl and PDI are taken as the raw materials to synthesize the BiOCl / PDI photocatalyst, or BiOCl and acidified PDI are taken as the raw materials to synthesize the BiOCl / PDI photocatalyst. The invention also provides an application method of using the photocatalyst to degrade organicmicro-pollutant wastewater. The preparation technology of the prepared BiOCl / PDI supermolecule photocatalyst is simple; the output is large; organic micro-pollutants in water can be efficiently degraded under a photocatalytic condition and a neutral condition without adding any oxidant; and the photocatalytic effect on cation type pollutants is better.

Description

technical field [0001] The invention relates to a photocatalyst and its preparation method and application method, in particular to a supramolecular heterojunction organic photocatalyst and its preparation method and application method, belonging to the field of wastewater treatment. Background technique [0002] With the development of the dye chemical industry, dyes are widely used in textile, leather, food, daily chemical and other industries. my country is currently a major producer of dyestuffs. In 2017, the output of dyestuffs has reached 990,000 tons, and it is showing an increasing trend year by year. Printing and dyeing wastewater has the characteristics of large water volume, large chroma, high content of organic pollutants, stability, and refractory degradation. It is one of the difficult industrial wastewater to treat. On the other hand, in the sewage produced by paper mills, dye manufacturing and oil refineries, phenol and its derivatives are an important class...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/06B01J27/06C02F1/30C02F101/34C02F101/30
CPCB01J31/06B01J27/06C02F1/30C02F2305/10C02F2101/308C02F2101/345B01J35/39
Inventor 何欢季秋忆武怡洁徐哲杨绍贵张利民向伟铭
Owner NANJING NORMAL UNIVERSITY
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