A kind of oms-2 catalytic material and its preparation method and application

A technology of OMS-2 and catalytic materials, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of lack of large-scale production and difficulty in obtaining, etc. Achieve the effect of green and environmental protection preparation route, simple operation, and increase pore volume

Active Publication Date: 2021-06-08
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although many documents and patents have reported the preparation method of OMS-2 in recent years, potassium permanganate must be used as a raw material or one of the raw materials, and potassium permanganate is not only expensive, but also belongs to the precursor chemical industry in my country. Products are subject to strict restrictions and supervision on procurement and use, and are often difficult to obtain. Therefore, the preparation method using potassium permanganate has a certain threshold, thus lacking the potential for large-scale production

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  • A kind of oms-2 catalytic material and its preparation method and application
  • A kind of oms-2 catalytic material and its preparation method and application
  • A kind of oms-2 catalytic material and its preparation method and application

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preparation example Construction

[0025] One aspect of the embodiments of the present invention provides a method for preparing an OMS-2 catalytic material, which includes:

[0026] Under the air atmosphere, the uniformly mixed reaction system containing manganese carbonate and additives is calcined at 300-500°C for 1-5 hours, and then the calcined solid mixture is acid-treated with potassium salt-containing nitric acid solution to obtain OMS-2 catalyst Material.

[0027] In some more specific embodiments, the preparation method specifically includes: uniformly mixing manganese carbonate and additives, and then performing ball milling treatment to form the uniformly mixed reaction system.

[0028] Further, the speed of the ball milling treatment is 500-700 r / min, and the time is 10-30 min.

[0029] In some more specific embodiments, the acid treatment includes: uniformly mixing the calcined solid mixture with a potassium salt-containing nitric acid solution, and stirring at 50-100°C for 0.1-12 hours to obtain...

Embodiment 1

[0054] (1) After mixing 10g of manganese carbonate and 1g of potassium acetate evenly, ball mill for 0.5h, and the solid mixture after ball milling was roasted at 300°C under air for 3h, and then put into 100ml of 0.5mol / L nitric acid aqueous solution in which 1g of potassium carbonate was dissolved , heated and stirred at 90° C. for 2 h, after the reaction was completed, filtered, washed with distilled water, and dried at 90° C. for 5 h to obtain the OMS-2 catalytic material. Material morphology characterization: the SEM spectrum of the OMS-2 catalytic material obtained in this embodiment is as follows figure 1 shown.

[0055] (2) Application of degrading organic pollutants in water

[0056] In the methylene blue dye waste water of 100mg / L, add potassium monomonosulfate, the concentration of potassium monomonosulfate is 500mg / L, then add the OMS-2 catalytic material prepared by the present embodiment in the waste water, this catalytic material is in waste water The concentr...

Embodiment 2

[0060] (1) Mix 10g of manganese carbonate and 10g of potassium oxalate evenly, ball mill for 1 hour, and roast the ball-milled solid mixture at 500°C for 3 hours in air, then put it into 100 mL of 0.1 mol / L nitric acid aqueous solution in which 0.1 g of potassium acetate is dissolved , heated and stirred at 100°C for 12h, after the reaction, filtered, washed with distilled water, and dried at 100°C for 10h to obtain the OMS-2 catalytic material. Material morphology characterization: the TEM spectrum of the OMS-2 catalytic material obtained in this embodiment is as follows figure 2 shown.

[0061] (2) Application of degrading organic pollutants in water

[0062] Add potassium peroxomonosulfate to 50mg / L of acid scarlet G dye waste water, the concentration of potassium peroxomonosulfate is 250mg / L, then add the OMS-2 catalytic material prepared by the present embodiment in the wastewater, the catalytic material The concentration in waste water is 200 mg / L, and after stirring ...

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Abstract

The invention discloses an OMS-2 catalytic material, a preparation method and application thereof. The preparation method comprises: calcining the solid mixture of manganese carbonate and additives at 300-500° C. for 1-5 hours, and then acid-treating the calcined solid mixture at 50-100° C. for 0.1-12 hours with an acid solution containing potassium salt, Obtain OMS‑2 catalytic material. The OMS-2 catalytic material prepared by the present invention has a single α-MnO 2 Crystal phase, higher than 100m 2 It has the advantages of specific surface area per g and increased pore volume; at the same time, the preparation method provided by the invention is simple to operate, the preparation route is green and environmentally friendly, the raw materials are cheap and easy to obtain, and the repeatability is good, which is convenient for large-scale production.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and catalytic materials, and in particular relates to an OMS-2 catalytic material and its preparation method and application. Background technique [0002] Manganese dioxide is a commonly used oxidizing material. It has various crystal forms and bulk phase structures such as α, β, γ, and δ, making it one of the inorganic mineral materials with great application potential. Manganese dioxide octahedral molecular sieve OMS-2 is a synthetic one-dimensional tunnel structure α-MnO discovered in recent years. 2 nanomaterials. OMS-2 consists of 2×2 MnO with shared sides and corners 6 Composed of structural units, the pore size is 0.46nm. OMS-2 has properties such as weak surface acidity and alkalinity, abundant surface oxygen species, excellent structural stability, and easy ion exchange, so it shows excellent characteristics in terms of conductivity, adsorption, ion exchange, and catalysis. Mor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/34B01J35/10C01G45/02C02F1/72C02F101/30C02F101/34C02F101/38
CPCB01J23/34B01J35/1019B01J35/1042C01G45/02C01P2002/72C01P2004/03C01P2004/04C02F1/722C02F1/725C02F2101/30C02F2101/308C02F2101/345C02F2101/38C02F2101/40
Inventor 孟旭赵培庆毕秀茹姚楠陈革新苟明霞王金梅
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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