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Molybdenum disulfide/ferroferric oxide magnetic nanocomposite material and preparation method and application thereof

A technology of ferric oxide and molybdenum disulfide, applied in catalyst activation/preparation, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as poor electrical conductivity, low degradation rate of tetracycline, complex degradation process, etc. Achieve enhanced photocatalytic activity, excellent photocatalytic effect, and good cycle stability

Inactive Publication Date: 2019-05-28
NINGXIA UNIVERSITY
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Problems solved by technology

However, its degradation process is complex and costly
[0004] Chinese patent CN105502775A discloses a process for degrading antibiotic wastewater, including steps such as adding persulfate, adjusting pH, first ultraviolet irradiation, adding thiosulfate, and second ultraviolet irradiation. Antibiotics are degraded, but the degradation process is very complicated and the cost is high
[0005] Chinese patent CN108187669A discloses a preparation method and application of photocatalytic nanomaterials for degrading tetracycline, the prepared Ag-SrTiO 3 The degradation rate of nanomaterials to tetracycline is 79.63% when illuminated by xenon light for 120 minutes, but its preparation cost is high, and the degradation rate of tetracycline is low
But MoS 2 Material morphology has a great influence on its photocatalytic degradation, such as bulk MoS 2 The photocatalytic ability of layered MoS 2 The photocatalytic ability is weak
And a single MoS 2 In practical applications, due to the problems of easy agglomeration, small specific surface area, and thick sheets, the materials often have poor conductivity and large volume changes during the ion-deintercalation process, which leads to poor recycling performance of the material and is harmful to organic pollution. The photocatalytic ability of the substance is weak

Method used

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  • Molybdenum disulfide/ferroferric oxide magnetic nanocomposite material and preparation method and application thereof
  • Molybdenum disulfide/ferroferric oxide magnetic nanocomposite material and preparation method and application thereof
  • Molybdenum disulfide/ferroferric oxide magnetic nanocomposite material and preparation method and application thereof

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preparation example Construction

[0032] The present invention provides the preparation method of the molybdenum disulfide / ferroferric oxide magnetic nanocomposite material according to the above technical solution, comprising the following steps:

[0033] The L-cysteine ​​solution, the sodium molybdate solution and the ferric tetroxide nano-particle dispersion are mixed to carry out a hydrothermal synthesis reaction to obtain the molybdenum disulfide / ferric tetroxide magnetic nanocomposite material.

[0034] In the present invention, the concentration of the L-cysteine ​​solution is preferably 0.01-0.03 mol / L, more preferably 0.015-0.025 mol / L, and most preferably 0.02 mol / L. In the present invention, the concentration of the sodium molybdate solution is preferably 0.01-0.03 mol / L, more preferably 0.01-0.025 mol / L, and most preferably 0.01-0.02 mol / L. In the present invention, the concentration of the ferric oxide nanoparticle dispersion is preferably 8-12 mg / L, more preferably 9-11 mg / L, and most preferably ...

Embodiment 1

[0052] Under the condition of stirring speed of 500r / min, 10mL of sodium molybdate solution with concentration of 0.01mol / L was added dropwise to 10mL of L-cysteine ​​solution with concentration of 0.01mol / L at a constant speed of 15 drops / min , continue to stir for 30min to obtain a mixed solution;

[0053] 10mg Fe with a particle size of 200nm 3 O 4 The particles were mixed with 1L of ultrapure water, and ultrasonically dispersed for 30min at a temperature of 25°C to obtain a dispersion of ferric oxide nanoparticles with a concentration of 10mg / L;

[0054] Add 2 mL of the ferric oxide nanoparticle dispersion and the mixed solution into the reaction kettle, stir for 80 min, and then perform a hydrothermal synthesis reaction at 180 ° C for 24 h, and then centrifuge the obtained system at 8000 r / min. 10min, the obtained solid material was washed 4 times alternately with pure water and absolute ethanol, then dissolved in absolute ethanol and air-dried to obtain Fe 3 O 4 MoS ...

Embodiment 2

[0058] The preparation was carried out according to the preparation method of Example 1, and the difference from Example 1 was that the amount of Fe3O4 nanoparticle dispersion liquid added was 4 mL to obtain Fe 3 O 4 MoS with a content of 25wt% 2 / Fe 3 O 4 Magnetic nanocomposites, labeled MoS 2 / Fe 3 O 4 (25wt%), its specific surface area is 16.8m 2 / g, the particle size is 185 nm, the yield is 90.6%, and the purity is 94.5%.

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Abstract

The invention relates to the technical field of magnetic nanocomposite materials, in particular to a molybdenum disulfide / ferroferric oxide magnetic nanocomposite material and a preparation method andapplication thereof. The molybdenum disulfide / ferroferric oxide magnetic nanocomposite material is of a flower type structure and is prepared by combining molybdenum disulfide and ferroferric oxide supported on the surface of molybdenum disulfide; and heterojunction is formed between molybdenum disulfide and ferroferric oxide. The photocatalytic degradation rate of organic pollutants for TC by the molybdenum disulfide / ferroferric oxide magnetic nanocomposite material is increased by 172.8% and 71.3% separately compared with a MoS2 material and a Fe3O4 material, and after recycling is performed for 5 times, the photodegradation rate of TC is only reduced by 3.5%. The test results show that the molybdenum disulfide / ferroferric oxide magnetic nanocomposite material is excellent in photocatalytic degradation effect on the organic pollutants and good in cycling stability.

Description

technical field [0001] The invention relates to the technical field of magnetic nano-composite materials, in particular to a molybdenum disulfide / ferric oxide magnetic nano-composite material and a preparation method and application thereof. Background technique [0002] Tetracycline hydrochloride is a commonly used antibiotic. At least 50% of the antibiotics in the world are used in animal husbandry and aquaculture every year. Antibiotics that cannot be fully absorbed by humans or animals are excreted into the environment in the form of metabolites. Isopropanol and triethanolamine are important chemical products and raw materials, which are widely used in pharmaceuticals, cosmetics, plastics, fragrances, coatings, etc. Tetramethylpiperidine is widely used in chemistry, biology, food industry, agriculture and other fields. All of these organic substances will have adverse effects on human health, thus causing circular pollution. Therefore, there is an urgent requirement fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/051B01J35/10B01J37/10C02F1/30C02F1/72C02F101/38C02F101/34C02F101/36
Inventor 刘英涛殷雪赖小勇王鑫
Owner NINGXIA UNIVERSITY
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