Producing two-dimensional sandwich nanomaterials based on graphene

Sorin IVANOVICI

Patent

Atlas literature

Patent

US 9,359,675

Producing two-dimensional sandwich nanomaterials based on graphene

Sorin IVANOVICI

Claims

Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.

4 independent · 16 dependent

1
Independentgraphene oxide particlesgraphenesol precursor compounds (metal halides, metal nitrates, metal carboxylates, metal oxysulfates, metal acetylacetonates, metal alkoxides, waterglass)graphene particles
A process for producing a two-dimensional nanomaterial nanomaterials comprising: (a) adding at least one sol precursor compound selected from the group consisting of metal halides, metal nitrates, metal carbox y lates, metal oxysulfates, metal acetylacetonates and metal alkoxides and also water g lass 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 (al) 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, y- butyrolactone, 1,3-dimethyl-2-imidazolidinone, N-methyl-pyrrolidone, dimethylformamide, dimethyl sulfoxide, tetrahydrof u ran, 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 so l 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 m in to at least SVG 13091674.11-20-2015.IH₈BDLA₈PXXIFW3.CLM.1.25.751.2850.874.2885.svg 0.117 0.41 Chemistry Black and white under inert gas atmosphere to reduce the graphene oxide to graphene, 2 Application No. 13/091,674 Reply to Oﬃce Action of wherein the two-dimensional nanomaterial roduced is conﬁned in a third dimension to a range of 0.3 nm to 500 nm including any coating.
1. 2
  Dependent← claim 1quaternary ammonium cationic surfactant
  The process according to claim 1 wherein mixture (a) comprises at least one cationic surfactant selected from the group of quaternary ammonium compounds.
2. 3
  Dependent← claim 1C₂-C₄-alkylene oxide block copolymers comprising ethylene oxide (nonionic surfactant)
  The process according to claim 1 wherein mixture (a) comprises at least one nonionic surfactant selected from the group of C 2 -C 4 -alkylene oxide block copolymers comprising ethylene oxide.
3. 6
  Dependent← claim 1SiO₂
  The process according to claim 1 wherein the at least one sol precursor compound is selected from SiO 2 precursor compounds.
4. 7
  Dependent← claim 1Si(OR)4/waterglass
  The process according to claim 1 wherein the at least one sol precursor compound is selected from waterglass and Si(OR) 4 where R is selected from H, CH 3, C 2 H 5, C 2 H 4 O H, n-C 3 H 7, i-C 3 H 7, n-C 4 H 9, and i-C 4 H 9, wherein R may be the same or diﬀerent. 3 Application No. 13/091,674 Reply to Oﬃce Action of
5. 20
  Dependent← claim 1graphene oxide particlesgraphene
  The process according to claim 1, comprising adding the at least one sol precursor compound to said mixture comprising graphene oxide particles, water and at least one cationic surfactant and/or nonionic surfactant. 5 Application No. 13/091,674 Reply to Oﬃce Action of
6. 21
  Dependent← claim 1graphene particlesorganic solvents for graphene exfoliation (N,N-dimethylacetamide, γ-butyrolactone, 1,3-dimethyl-2-imidazolidinone, N-methyl-pyrrolidone, dimethylformamide, dimethyl sulfoxide, tetrahydrofuran, cyclohexane)
  The process according to claim 1, comprising adding the at least one sol precursor compound to said mixture comprising graphene particles, at least one solvent selected from the group consisting of N,N-dimethylacetamide, y-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.
7. 23
  Dependent← claim 1graphene oxide particlesgraphene
  The process according to claim 1, comprising: (a) adding said at least one sol precursor compound to (al) a mixture comprising graphene oxide particles, water and at least one cationic surfactant and/or nonionic surfactant to form mixture (a), and (b) reacting mixture (a) in a sol/gel process for from 2 to 18 hours at 10 to 80 SVG 13091674.11-20-2015.IH₈BDLA₈PXXIFW3.CLM.5.17.653.2161.699.2201.svg 0.133 0.153 Chemistry Black and white to form gel from the at least one sol precursor compound on the graphene oxide particles, and wherein said process produces coated graphene oxide particles comprising 80-92% by weight of graphene oxide and 8-20% by weight of coating formed from the gel.
8. 24
  Dependent← claim 1graphene particlesorganic solvents for graphene exfoliation (N,N-dimethylacetamide, γ-butyrolactone, 1,3-dimethyl-2-imidazolidinone, N-methyl-pyrrolidone, dimethylformamide, dimethyl sulfoxide, tetrahydrofuran, cyclohexane)
  The process according to claim 1, comprising: (a) adding said at least one sol precursor compound to (a2) a mixture comprising graphene particles, at least one solvent selected from the group 6 Application No. 13/091,674 Reply to Oﬃce Action of consisting of N,N-dimethylacetamide, y -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), and (b) reacting mixture (a) in a sol/gel process for from 2 to 18 hours at 10 to 80 SVG 13091674.11-20-2015.IH₈BDLA₈PXXIFW3.CLM.6.8.657.894.703.934.svg 0.133 0.153 Chemistry Black and white to form gel from the at least one sol precursor compound on the graphene particles, and wherein said process produces coated graphene particles comprising 80- 92% by weight of grapheme graphene oxide and 8-20% by weight of coating formed from the gel. 7
4
Independent
canceled
5
Independentsol precursor compounds (metal halides, metal nitrates, metal carboxylates, metal oxysulfates, metal acetylacetonates, metal alkoxides, waterglass)
The process according to claim I wherein the at least one sol precursor compound is 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 H f.
14
Independent
Claims 14 -18 canceled

Materials

Materials described outside the worked examples.

graphene oxide particles

Starting Material Substrate

graphene

Product Substrate

Process steps

Additional fabrication and treatment steps described in the patent.

Sol Gel Coating

Step 1

Process details

steps:Add sol precursor compound to graphene oxide/water/surfactant mixture or graphene/organic solvent/surfactant mixture, React in sol/gel process to form gel on graphene oxide or graphene particles, Remove surfactant, Optionally heat gel-coated graphene oxide particles for at least 1 min to at least 500°C under inert gas atmosphere to reduce graphene oxide to graphene

temperature c max:80

Reported properties

Performance values and ranges asserted in the specification or claims.

Property	Value	Material
Thickness Range	0.3–500 nm	two-dimensional sandwich nanomaterial

Why these are connected

Related documents with shared materials, methods, properties, or citations.

Producing two-dimensional sandwich nanomaterials based on graphene | Matter42 Literature