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Preparation method of hollow metal oxide nano material

A technology of nanomaterials and oxides, applied in chemical instruments and methods, nanotechnology, nanotechnology, etc., can solve the problems of complex process and many influencing factors, and achieve the effect of simple synthesis, less control parameters and economical savings

Inactive Publication Date: 2019-12-20
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problems of complex process or many influencing factors in the preparation of amorphous hollow metal oxide nanoparticles in the prior art, the present invention provides a simple preparation of hollow metal oxide nanoparticles using ZIF-8 as a soft / hard dual template. Methods

Method used

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  • Preparation method of hollow metal oxide nano material

Examples

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preparation example Construction

[0040] Preparation of 250 nm ZIF-8 nanoparticles

[0041] Weigh 16mmol of zinc nitrate hexahydrate and 64mmol of 2-methylimidazole and dissolve them in 100mL of methanol solvent to form a uniform dispersion solution, mix well and continue to react for 2 hours at a stirring speed of 400r / min to obtain the final 250nm size The nanoparticle product was centrifuged, washed, and vacuum-dried at 40°C.

[0042] Preparation of 140 nm ZIF-8 nanoparticles

[0043] Weigh 16mmol of zinc nitrate hexahydrate and 64mmol of 2-methylimidazole and dissolve them in 100mL of methanol solvent to form a uniform dispersion solution, mix well and continue to react for 2 hours at a stirring speed of 400r / min to obtain the final 140nm size The nanoparticle product was centrifuged, washed, and vacuum-dried at 40°C.

[0044] Preparation of 50 nm ZIF-8 nanoparticles

[0045] Weigh 16mmol of zinc nitrate hexahydrate and 64mmol of 2-methylimidazole and dissolve them in 500mL of methanol solvent to form a...

Embodiment 1

[0051] Take by weighing 25mg prepared 250nm ZIF-8 nanoparticles and disperse them in the ethanol-ethylene glycol mixed treatment solution of 15mL 5:1 (volume ratio, the same below), to form ZIF-8 sol dispersion system A; Weigh 0.2mmol Manganese chloride dihydrate, 3mmol ammonium chloride and 20mmol ammonia water (mass percentage concentration 28%, the same below) were mixed and dispersed in 15mL (volume ratio: 9:1, the same below) of ethanol-water mixed treatment solution to form B solution ; At room temperature, the two solutions of A and B were quickly mixed, stirred and reacted at 330r / min for 16 hours, centrifuged, washed alternately with water and ethanol, and vacuum-dried at 40°C to finally obtain the final hollow manganese oxide nanoparticles. The TEM images of the samples are shown in figure 1 .

Embodiment 2

[0053] Weigh 25mg of prepared 50nm ZIF-8 nanoparticles and disperse them into 15mL of 5:1 ethanol-ethylene glycol mixed treatment solution to form ZIF-8 sol dispersion system A; weigh 0.4mmol manganese chloride dihydrate, 6mmol Ammonium chloride and 40mmol ammonia water (28%) were mixed and dispersed in 15mL 9:1 ethanol-water mixed treatment solution to form B solution; at room temperature, the two solutions A and B were quickly mixed and stirred at 330r / min for reaction After 16 hours, centrifugation, alternate washing with water and ethanol, and vacuum drying at 40°C, the final hollow manganese oxide nanoparticles were finally obtained.

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Abstract

The invention relates to a preparation method of a hollow metal oxide nano material. The preparation method comprises the following step: dispersing a prepared zeolite imidazolate framework ZIF-8 porous nano material which serves as a template into an ethanol-ethylene glycol mixed treatment solution to form a dispersion system; mixing a metal iron salt or manganese salt with ammonium chloride / ammonia water, or mixing the metal iron salt or manganese salt with an alkaline growth promoting liquid of sodium bicarbonate to form an iron or manganese ion complex precursor; mixing the precursor witha template solution, carrying out continuous stirring at room temperature for reacting, then centrifuging the product, and carrying out washing and vacuum-drying treatment to prepare a final sample. Under ultrasonic induction, hollow metal oxide nanoparticles show high active oxygen generation capacity, and have a great application value in tumor sonodynamic therapy. Compared with a traditional method, the method has the following obvious advantages: 1) the template is easy to prepare and is free of pollution; 2) synthesis regulation and control parameters are few, the process is simple, raw materials are low in cost, and industrial production can be achieved; and 3) the size of the product is controllable.

Description

Technical field: [0001] The invention relates to the field of materials and biochemical industry, and more specifically relates to a simple preparation method and biochemical application of hollow structure metal oxide nanomaterials. Background technique: [0002] Transition metal oxides have the characteristics of low price, simple preparation, and wide application, and have been widely studied in the fields of catalysis, energy, and life. In addition, as a catalyst, this type of material also has the characteristics of anti-poisoning, good thermal stability, long service life, high selectivity to oxidation reactions, and the valence state of metal ions can be changed under the action of the reaction atmosphere. The latest research results show that transition metal compounds with variable valence characteristics can undergo Fenton reaction or Fenton-like reaction under external driving conditions (such as light, temperature, pH, etc.), forming active oxygen free radicals w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/02C01G45/02B82Y30/00B82Y40/00A61K41/00A61P35/00C02F1/72C02F101/30
CPCA61K41/0057A61P35/00B82Y30/00B82Y40/00C01G45/02C01G49/02C01P2004/04C01P2004/62C02F1/725C02F2101/30
Inventor 刘惠玉王伟伟于志昊李亲韩泽辉
Owner BEIJING UNIV OF CHEM TECH
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