Producing two-dimensional sandwich nanomaterials based on graphene

摘要

Two-dimensional nanomaterials are produced in a process comprising the steps of
(a) providing
(a1) a mixture comprising graphene oxide particles, water and at least one cationic surfactant and/or nonionic surfactant or(a2) a mixture comprising graphene particles, at least one solvent useful for solution exfoliation of graphite and at least one cationic surfactant and/or nonionic surfactant,(b) adding at least one sol precursor compound to the mixture from step (a),(c) reacting the mixture from step (b) in a sol/gel process to form gel from the at least one sol precursor compound on the graphene oxide particles or, respectively, the graphene particles,(d) removing the at least one surfactant, and(e) optionally heating the gel-coated graphene oxide particles for at least 1 min to at least 500° C. under inert gas atmosphere to reduce the graphene oxide to graphene.

主权项

1. A process for producing a two-dimensional nanomaterial comprising:
(a) adding at least one sol precursor compound selected from the group consisting of metal halides, metal nitrates, metal carboxylates, metal oxysulfates, metal acetylacetonates and metal alkoxides and also waterglass for Si, wherein the metal is selected from the group consisting of Zn, Mg, Al, Y, Fe, Cr, Co, Si, Zr, Ti, Ce, Mo, W and Hf to
(a1) a mixture comprising graphene oxide particles, water and at least one cationic surfactant and/or nonionic surfactant, or(a2) a mixture comprising graphene particles, at least one solvent selected from the group consisting of N,N-dimethylacetamide, γ-butyrolactone, 1,3-dimethyl-2-imidazolidinone, N-methyl-pyrrolidone, dimethylformamide, dimethyl sulfoxide, tetrahydrofuran, and cyclohexane and at least one cationic surfactant and/or nonionic surfactant,to form mixture (a) (b) reacting mixture (a) in a sol/gel process to form gel from the at least one sol precursor compound on the graphene oxide particles or, respectively, the graphene particles, (c) removing the at least one surfactant, and (d) optionally heating the gel-coated graphene oxide particles for at least 1 min to at least 500° C. under inert gas atmosphere to reduce the graphene oxide to graphene,wherein the two-dimensional nanomaterial produced is confined in a third dimension to a range of 0.3 nm to 500 nm including any coating.