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Preparation method of 8-hydroxyquinoline iron organic dye photodegradation catalyst

A technology of iron hydroxyquinoline and organic dyes, applied in the direction of organic chemical methods, iron organic compounds, iron group organic compounds without C-metal bonds, etc., can solve the difficulties of preparation and recovery separation, low efficiency of solar energy utilization, prohibition of titanium dioxide Bandwidth and other issues, to achieve the effect of high catalytic efficiency, cheap reaction raw materials, and short synthesis steps

Active Publication Date: 2020-11-03
ANHUI UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0003] At present, the catalysts used to catalyze the photodegradation of organic dyes are mainly porous titanium dioxide and its derivatives. There are three deficiencies in the photodegradation of organic dyes catalyzed by titanium dioxide and its derivatives: one is that the synthesis of porous titanium dioxide and its derivatives is relatively cumbersome. It is extremely difficult to separate and recycle; another deficiency is the band gap of titanium dioxide, low solar energy utilization efficiency, and can only absorb a small amount of ultraviolet light in sunlight; in addition, another deficiency is that it is extremely prone to agglomeration in the process of storage and photocatalysis , which will greatly reduce the catalytic activity
This paper studies the photodegradation of methylene blue by titanium dioxide under different experimental conditions, and proposes a reasonable photodegradation mechanism, but the experimental conditions of this method are relatively harsh

Method used

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  • Preparation method of 8-hydroxyquinoline iron organic dye photodegradation catalyst
  • Preparation method of 8-hydroxyquinoline iron organic dye photodegradation catalyst
  • Preparation method of 8-hydroxyquinoline iron organic dye photodegradation catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0037] ①Dissolve 27~165mg (E)-2-[2-(4-pyridyl)vinyl]-8-hydroxyquinoline in N,N-dimethylformamide or methanol, dissolve 40~240mg iron salt In 1~5mL of methanol or N,N-dimethylformamide, mix the two, then stir at room temperature, then raise the temperature of the reaction solution to 60~80°C, react at 60~80°C, after the reaction Slowly lower to room temperature to obtain brown-black blocky crystals, which are then washed in methanol and dried to obtain catalytically active 8-hydroxyquinoline catalyst a.

[0038] ②Dissolve 10mg of rhodamine B in 100mL of water, then add 5mg of the above catalyst, stir, and catalyze degradation under the irradiation of visible light. After sampling and centrifuging at regular intervals, the supernatant was taken to measure the ultraviolet-visible absorption spectrum, and the degradation rate of Rhodamine B was determined.

[0039] Such as Figure 4 As shown, as the illumination time prolongs, the intensity of the characteristic peak 554nm of Rh...

Embodiment 2

[0041] ①Dissolve 27~165mg (E)-2-[2-(3-nitrophenyl)vinyl]-8-hydroxyquinoline in N,N-dimethylformamide or methanol, 40~240mg iron Dissolve the salt in 1-5mL of methanol or N,N-dimethylformamide, mix the two, then stir at room temperature, then raise the temperature of the reaction solution to 60-80°C, react at a temperature of 60-80°C, and react Slowly lower to room temperature after the end to obtain brown-black bulk crystals, which are then washed in methanol and dried to obtain catalytically active 8-hydroxyquinoline catalyst b.

[0042] ②Dissolve 10mg of rhodamine B in 100mL of water, then add 5mg of the above catalyst, stir, and catalyze degradation under the irradiation of visible light. After sampling and centrifuging at regular intervals, the supernatant was taken to measure the ultraviolet-visible absorption spectrum, and the degradation rate of Rhodamine B was determined.

[0043] Such as Figure 5 As shown, with the prolongation of the light time, the intensity of t...

Embodiment 3

[0045] ①Dissolve 27~165mg (E)-2-[2-(4-methoxyphenyl)vinyl]-8-hydroxyquinoline in N,N-dimethylformamide or methanol, 40~240mg Dissolve the iron salt in 1-5mL of methanol or N,N-dimethylformamide, mix the two, and then stir at room temperature, then raise the temperature of the reaction solution to 60-80°C, and react at a temperature of 60-80°C. After the reaction was finished, it was slowly lowered to room temperature to obtain brown-black blocky crystals, which were then washed in methanol and dried to obtain the catalytically active 8-hydroxyquinoline catalyst c.

[0046] ②Dissolve 10mg of rhodamine B in 100mL of water, then add 5mg of the above catalyst, stir, and catalyze degradation under the irradiation of visible light. After sampling and centrifuging at regular intervals, the supernatant was taken to measure the ultraviolet-visible absorption spectrum, and the degradation rate of Rhodamine B was determined.

[0047] Such as Figure 6 As shown, with the extension of th...

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Abstract

The invention discloses a preparation method of an 8-hydroxyquinoline iron organic dye photodegradation catalyst, and belongs to the field of metal-organic complexes. The method comprises the following steps: firstly, preparing a photodegradation catalyst reaction solution, dissolving ligands in N,N-dimethylformamide or methanol, dissolving an iron salt in methanol or N,N-dimethylformamide, mixingthe obtained two solutions, carrying out stirring at room temperature, heating the prepared reaction liquid to 60-80 DEG C for a reaction, slowly carrying out cooling to room temperature after the reaction is finished to obtain a brown black block crystal, then carrying out washing in methanol, and carrying out airing, so as to obtain the 8-hydroxyquinoline catalyst with catalytic activity. Themethod provided by the invention has simple operation, mild condition and low cost, and the efficiency is high when the catalyst is applied to organic dye photodegradation, so that the method providedby the invention has feasibility in industrial application.

Description

Technical field: [0001] The invention belongs to the technical field of metal-organic complexes, and in particular relates to a preparation method of an 8-hydroxyquinoline iron organic dye photodegradation catalyst. Background technique: [0002] my country has many garment manufacturing enterprises and has always been a big country in the production and use of organic dyes. In the manufacturing process of clothing, a large amount of wastewater containing organic dyes will be produced. These pollutants have the characteristics of various types, high toxicity, and refractory degradation, which has become a difficulty in industrial wastewater treatment. At present, dye wastewater treatment methods mainly include physical methods, chemical methods, biological methods and some combined processes. With the increasing difficulty of dye wastewater treatment and higher discharge standards, traditional treatment methods have been difficult to meet the discharge standards. Therefore...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/22C02F1/30C07F15/02C02F101/38
CPCB01J31/1825B01J31/183B01J35/004B01J2531/842C02F1/30C02F2101/308C02F2101/38C07B2200/13C07F15/025
Inventor 张莉艳杨坤李士伟
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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