Preparation method of exposed [200] crystal face monocrystal square OMS-2 nano material

A technology of OMS-2 and nanomaterials, applied in separation methods, chemical instruments and methods, molecular sieve catalysts, etc., can solve problems such as high production costs and difficult processing, and achieve the effects of low cost, simple process, and mild reaction conditions

Inactive Publication Date: 2014-09-03
HEBEI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the above patents or literature reports, the exposure of special crystal planes often requires organic solvents, surfactants, templating agents or under high temperature and high pressure. These methods make sample post-processing difficult, high production costs, and have a certain degree

Method used

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  • Preparation method of exposed [200] crystal face monocrystal square OMS-2 nano material
  • Preparation method of exposed [200] crystal face monocrystal square OMS-2 nano material
  • Preparation method of exposed [200] crystal face monocrystal square OMS-2 nano material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] (1) At room temperature, add 0.02 mmol of propionaldehyde dropwise to 0.02 mmol of potassium permanganate solution, continue to stir for 24 hours after the dropwise addition, filter, wash, and wash three times with absolute ethanol, then place in a horse In the Furnace, the temperature was raised to 400°C at a rate of 1°C / min, and burned for 6 hours to obtain MnO 2 - propane-400 catalyst.

[0015] (2) Catalyst activity evaluation

[0016] The concentration of o-xylene is 400ppm, and the air velocity is 7200h -1 . Detection of o-xylene and reaction product CO by gas chromatography with dual FID 2content. The OMS-2 nano-material is used as a catalyst to completely catalyze the combustion and eliminate o-xylene (100% conversion of o-xylene) at a temperature of 210°C. In the range of °C, the conversion rate of o-xylene increases linearly until it reaches 100%. In the catalytic combustion elimination reaction of o-xylene, o-xylene is completely converted into CO 2 and ...

Embodiment 2

[0018] (1) At room temperature, add 0.02 mmol of n-butyraldehyde dropwise to 0.02 mmol of potassium permanganate solution, the molar ratio of the reactants is 1:1, continue stirring for 24 hours after the addition, filter, wash, and use Wash with absolute ethanol three times, place in a muffle furnace to 450°C at a rate of 1°C / min, and burn for 6 hours to obtain MnO 2 - n-butyl-400 catalyst.

[0019] (2) Catalyst activity evaluation

[0020] Method is with embodiment 1.

Embodiment 3

[0022] (1) At room temperature, add 0.02 mmol of isobutyraldehyde dropwise to 0.02 mmol of potassium permanganate solution, the molar ratio of the reactants is 1:1, continue stirring for 24 hours after the addition, filter, wash, and use Wash with absolute ethanol three times, place in a muffle furnace to 500°C at a rate of 1°C / min, and burn for 6 hours to obtain MnO 2 - Isobutyl-400 catalyst.

[0023] (2) Catalyst activity evaluation

[0024] Method is with embodiment 1.

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Abstract

The invention discloses a preparation method of an exposed [200] crystal face monocrystal square OMS-2 nano material. The method comprises the following steps: dropwisely adding 0.02 mmol of aldehyde substance into 0.02 mmol of potassium permanganate solution according to the mole ratio of 1:1, continuing stirring for 12-24 hours after finishing the dropwise addition, carrying out vacuum filtration, washing with water, washing with anhydrous ethanol, and roasting the obtained product in a muffle furnace at 500-600 DEG C for 4-6 hours, thereby obtaining the exposed [200] crystal face monocrystal square OMS-2 nano material. The method has the advantages of simple equipment, low cost, no environmental pollution and mild reaction conditions, and can easily implement large-scale production. The prepared catalyst material has low-temperature activity for o-xylene, and can completely convert the o-xylene into CO2 and H2O at 200-230 DEG C. The material has important application values in the fields of adsorption, catalysis, molecular sieves, electrode materials and the like.

Description

technical field [0001] The invention relates to a manganese oxide molecular sieve catalyst material, in particular to a nanometer tetragonal manganese oxide molecular sieve catalyst material exposed to a [200] crystal plane, belonging to the technical fields of nanomaterials, environmental catalysis and air pollution control. Background technique [0002] Benzene series such as benzene, toluene, and xylene are widely used as important chemical raw materials and good organic solvents in the industrial production of medicine, chemical industry, and building decoration materials. Such volatile organic compounds (VOCs) After being discharged into the environment, it will seriously endanger the environment and human health. The catalytic combustion method can directly convert VOCs into carbon dioxide and water under the action of a catalyst. Therefore, it is the most promising technology. The development of high-efficiency catalysts is the key to realize catalytic combustion. ...

Claims

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Application Information

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IPC IPC(8): C01G45/02B01J29/03B01D53/86B01D53/72
Inventor 吴银素郭琳琳刘肖肖
Owner HEBEI NORMAL UNIV
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