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

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. ...

AI Technical Summary

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 of impact on the environment.

Moreover, up to now, the single-crystal tetragonal OMS-2 with exposed [200] facets has not been reported yet.

Moreover, there are few reports on the structure-activity relationship between the crystal plane of OMS-2 and the activity of catalytic oxidation of VOCs.

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