Method for synthesizing manganese octahedron molecular screen by ultrasound

Abstract

The invention discloses a method of synthesis octahedral manganese molecular sieve by ultrasound, which is that: under the reaction temperature of 40 - 100 DEG C, acidic liquid of potassium permanganate and manganese sulfate are mixed in molar ratio within 0.5 to 1.5, the mixture is sent into an ultrasonic water bath to react for a certain time; the obtained material is filtrated, washed and dried, and the octahedral manganese molecular sieve (OMS-2) is finally made. The produced material can be used for electrode materials, adsorption of heavy metal ion in sewage and catalysis and oxidation of organic compounds such as phenol, methanol, formaldehyde and cyclohexane, low-temperature catalysis and oxidation of CO. In addition, the method is simple and easy to apply and can quickly synthesize OMS-2 material.

Description

technical field [0001] The invention relates to a method for synthesizing manganese octahedral molecular sieves by ultrasonic. Background technique [0002] As a new type of functional material, manganese oxide octahedral molecular sieve (OMS-2) can be used in low-temperature oxidation reaction of carbon monoxide, SCR reaction of nitrogen oxides in automobile exhaust, electrochemical reaction, organic pollutants (such as phenol, methanol, formaldehyde, ring Hexane, etc.) degradation reactions and the adsorption of heavy metal ions in water sources have been widely used. OMS-2 has the advantages of excellent hydrophobicity, thermal stability, ion exchangeability and rich lattice oxygen. At present, there are many ways to synthesize OMS-2 materials, such as: reflux method, in acidic solution, using KMnO 4 , K 2 S 2 o 8 , or KClO 3 Mn oxide 2+ , but this method requires a long reaction time, and generally requires at least reflux for 24 hours to obtain a complete crystal...

AI Technical Summary

Problems solved by technology

At present, there are many ways to synthesize OMS-2 materials, such as: reflux method, in acidic solution, using KMnO 4 , K 2 S 2 o 8 , or KClO 3 Mn oxide 2+ , but this method requires a long reaction time, and generally requires at least reflux for 24 hours to obtain a complete crystal form; the sol-gel method uses KMnO 4 Reaction with polyols (glucose), polycarboxylic acids (maleic acid, fumaric acid), this method is prone to produce other crystal forms, resulting in the preparation of materials mixed with heterogeneous phases

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