Preparation method of N-doped carbon material using cyclodextrin

Abstract

A preparation method of an N-doped carbon material using cyclodextrin comprises the following steps: 1) adding beta-cyclodextrin and melamine into an sulfuric acid solution to obtain a mixed liquor; 2) adding an ordered meso-porous silicon material SBA-15, heating and reacting to obtain a black solid a; 3) adding beta-cyclodextrin and melamine into the sulfuric acid solution, adding the above black solid a, heating and reacting to obtain a black solid b; and 4) roasting the black solid b in a nitrogen atmosphere, cooling to room temperature, grinding into powder, adding the powder into a NaOH solution and carrying out a reflux reaction, washing a filter cake with water until a filtrate is neutral, and drying to prepare the N-doped carbon material. The prepared N-doped carbon material using cyclodextrin is used for reduction of nitro-aromatic compounds. The invention has the following advantages: the process of the preparation method is simple; raw materials are cheap and easily available; the obtained material has large specific surface area, reasonable pore diameter and good selectivity; and yield of the product is high. The invention provides a green and efficient technology for preparation of arylamine compounds.

Description

technical field [0001] The invention belongs to the field of metal-free catalysis, and relates to a preparation method of an azacarbon material constructed by cyclodextrin. technical background [0002] As an important chemical intermediate, aromatic amines are widely used in the fields of medicine, pigments, pesticides, additives and dyes, and their synthesis methods have attracted much attention. See 1) Li Y.; Zhou Y.-X.; Ma X.; Jiang H.-L,; Chem.Commun., 2016, 52, 4199-4202; 2) Abdullsev M.-G.; Gebekova Z.-G.; Petrol.Chem., 2016, 56(2) :146-150. At present, people tend to synthesize aromatic amines by reduction of nitroaromatics. There are three reduction methods: metal reduction, electrolytic reduction and catalytic hydrogenation reduction, see 1) Pélisson C.-H.; Audrey D.-N. ; Roucoux A.; ACS Sustainable Chem. Eng., 2016, 4, 1834-1839; 2) Mondal J.; Kundu S.-K.; Hung Ng W.-K.; Singuru R.; Borah P.; Hirao H.; Zhao Y.-L.; Bhaumik A.; Chem. Eur. J., 2015, 21, 19016-1902...

AI Technical Summary

Problems solved by technology

However, this process mostly uses metal-loaded catalysts such as palladium, platinum, and nickel. The use of these metals increases the production cost to a certain extent, and causes metal residues in the product at the same time. See 1) Wang J.-Q.; Ge D .-H.; Cao X.-Q.; Tang M.-H.; Pan Y.; Gu H.-W.; .; Zhou C.-S.; Zhao H.-X.; Wang R.-H.; Nano Res.,2015,8(3):709-721; 3) Liu W.-J.; Tian K.; Jiang H.; Green Chem, 2015, 17, 821-826

In addition, this process is used for the reduction of multi-substituted nitroaromatic compounds, which will produce a large number of side reactions and affect the selectivity of products, see Feng W.-H.; Dong H.-X.; Niu L.-B.; Wen X.; Huo L.; Bai G.-Y.; J. Mater. Chem. A, 2015, 3, 19807-19814

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