▎ 摘　　要

NOVELTY - Preparing sandwich-structured manganese-based catalyst comprising (1) adding sodium hydroxide solution into the graphene solution, and uniformly mixing to obtain a mixed solution; adding hexadecyl trimethyl ammonium bromide into the mixed solution and adding deionized water to prepare a micelle sphere solution, where the concentration of graphene in the micelle sphere solution is 0.1-1 g/l, the concentration of hexadecyl trimethyl ammonium bromide in the micelle ball solution is 1-5 g/l, and the concentration of sodium hydroxide in the micelle ball solution is 1-5 mmol/l, (2) dropwise adding an ethanol solution with a concentration of 20 vol.% ethyl orthosilicate into the micelle ball solution obtained in step (1), and then raising the temperature to 40-80C and continuously stirring for 2-24 hours to obtain a first mixed solution. USE - The sandwich-structured manganese-based catalyst is useful in catalytic decomposition of organic volatile gas (claimed). DETAILED DESCRIPTION - Preparing sandwich-structured manganese-based catalyst comprising (1) adding sodium hydroxide solution into the graphene solution, and uniformly mixing to obtain a mixed solution; adding hexadecyl trimethyl ammonium bromide into the mixed solution and adding deionized water to prepare a micelle sphere solution, where the concentration of graphene in the micelle sphere solution is 0.1-1 g/l, the concentration of hexadecyl trimethyl ammonium bromide in the micelle ball solution is 1-5 g/l, and the concentration of sodium hydroxide in the micelle ball solution is 1-5 mmol/l, (2) dropwise adding an ethanol solution with a concentration of 20 vol.% ethyl orthosilicate into the micelle ball solution obtained in step (1), and then raising the temperature to 40-80C and continuously stirring for 2-24 hours to obtain a first mixed solution, where the volume ratio of the ethanol solution of tetraethyl orthosilicate to the volume ratio of the micelle sphere solution is 1: 95-105, (3) filtering or centrifuging the first mixed solution obtained in step 2, taking the precipitate, cleaning the precipitate, drying and grinding the precipitate to obtain powder, calcining the powder at 700-900C for 1.5-2.5 hours under the protection of nitrogen, and then grinding to obtain the sandwich powder, (4) adding the sandwich powder obtained in step (3) to deionized water, and uniformly stirring to prepare a sandwich powder solution with a concentration of 0.1-2 g/l, (5) adding a potassium permanganate solution into the sandwich powder solution prepared in step 4, and uniformly stirring to obtain a second mixed solution, where the mass volume ratio of the potassium permanganate to the sandwich powder solution is 1-2 g/l, (6) dropwise adding n-butanol to the second mixed solution obtained in step (5), and stirring and reacting at normal temperature to obtain a reaction solution, wherein the mass ratio of the addition amount of n-butanol to the addition amount of potassium permanganate is not lower than 4.68, (7) allowing to stand and filtering the reaction solution obtained in step (6), filtering the precipitate, washing the precipitate, drying and calcining in an air environment, dispersing the calcined powder into deionized water, adding excessive sodium hydroxide to remove silicon dioxide, washing with deionized water, and drying to obtain the sandwich-structure manganese-based catalyst. An INDEPENDENT CLAIM is included for manganese-based catalyst with a sandwich structure prepared by above method.