Patent
ULTRATHIN, MOLECULAR-SIEVING GRAPHENE OXIDE MEMBRANES FOR SEPARATIONS ALONG WITH THEIR METHODS OF FORMATION AND USE
Yu et al.
US
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Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A filtration membrane, comprising: a porous substrate having a plurality of substrate pores; and a graphene oxide membrane on the porous substrate, the graphene oxide membrane having a thickness of about 1.8 nm to about 180 nm, wherein the graphene oxide membrane comprises about 3 to about 30 layers of single-layered graphene oxide flakes, wherein the graphene oxide membrane has a plurality of membrane pores, and wherein the membrane pores are smaller than the substrate pores.
The filtration membrane of claim 1, wherein the single-layered graphene oxide flakes have a size up to about 500 nm.
The filtration membrane of claim 1, wherein about 1.8 nm to about 20 nm.
The filtration membrane of claim 1, wherein about 1.8 nm to about 18 nm.
The filtration membrane of claim 1, wherein to about 10 layers of the single-layered graphene
The filtration membrane of claim 1, wherein about 4 cm 2 or greater.
The filtration membrane of claim 1, wherein filter.
The filtration membrane of claim 1, wherein size of about 20 nm to about 100 nm. 7 the graphene oxide membrane has a thickness of the graphene oxide membrane has a thickness of the graphene oxide membrane comprises about 3 oxide flakes. the graphene oxide membrane has an area of the porous substrate is an anodic aluminum oxide the porous substrate defines pores having a pore
canceled
Embodiments described in the patent, grouped by the materials and process steps they use.
3 materials1 process step
Single-layered graphene oxide powder is dispersed in deionized water to form a GO dispersion. The dispersion is centrifuged to remove aggregated GO material. The dispersion is then diluted by about ten times or more with deionized water. The diluted dispersion is passed through a porous substrate (anodic aluminum oxide, AAO) by vacuum filtration to form a GO membrane. Ultrathin GO membranes of 1.8, 9, and 18 nm thickness were prepared by diluting the 180-nm thick membrane filtration solution by 100, 20, and 10 times respectively, while maintaining total filtration solution volume constant at 25 mL.
Layer stacks claimed or described, ordered top of device to substrate.
filtration membrane
Materials described outside the worked examples.
single-layered graphene oxide powder
deionized water
H₂O
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
graphene oxide membrane thickness (claimed range) | 1.8–180 nm | graphene oxide membrane |
ultrathin GO membrane thickness-1.8 nm example | 1.8 nm |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
Patent drawings and their descriptions. Click a drawing to enlarge it.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A filtration membrane, comprising: a porous substrate having a plurality of substrate pores; and a graphene oxide membrane on the porous substrate, the graphene oxide membrane having a thickness of about 1.8 nm to about 180 nm, wherein the graphene oxide membrane comprises about 3 to about 30 layers of single-layered graphene oxide flakes, wherein the graphene oxide membrane has a plurality of membrane pores, and wherein the membrane pores are smaller than the substrate pores.
The filtration membrane of claim 1, wherein the single-layered graphene oxide flakes have a size up to about 500 nm.
The filtration membrane of claim 1, wherein about 1.8 nm to about 20 nm.
The filtration membrane of claim 1, wherein about 1.8 nm to about 18 nm.
The filtration membrane of claim 1, wherein to about 10 layers of the single-layered graphene
The filtration membrane of claim 1, wherein about 4 cm 2 or greater.
The filtration membrane of claim 1, wherein filter.
The filtration membrane of claim 1, wherein size of about 20 nm to about 100 nm. 7 the graphene oxide membrane has a thickness of the graphene oxide membrane has a thickness of the graphene oxide membrane comprises about 3 oxide flakes. the graphene oxide membrane has an area of the porous substrate is an anodic aluminum oxide the porous substrate defines pores having a pore
canceled
Embodiments described in the patent, grouped by the materials and process steps they use.
3 materials1 process step
Single-layered graphene oxide powder is dispersed in deionized water to form a GO dispersion. The dispersion is centrifuged to remove aggregated GO material. The dispersion is then diluted by about ten times or more with deionized water. The diluted dispersion is passed through a porous substrate (anodic aluminum oxide, AAO) by vacuum filtration to form a GO membrane. Ultrathin GO membranes of 1.8, 9, and 18 nm thickness were prepared by diluting the 180-nm thick membrane filtration solution by 100, 20, and 10 times respectively, while maintaining total filtration solution volume constant at 25 mL.
Layer stacks claimed or described, ordered top of device to substrate.
filtration membrane
Materials described outside the worked examples.
single-layered graphene oxide powder
deionized water
H₂O
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
graphene oxide membrane thickness (claimed range) | 1.8–180 nm | graphene oxide membrane |
ultrathin GO membrane thickness-1.8 nm example | 1.8 nm |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
Patent drawings and their descriptions. Click a drawing to enlarge it.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A filtration membrane, comprising: a porous substrate having a plurality of substrate pores; and a graphene oxide membrane on the porous substrate, the graphene oxide membrane having a thickness of about 1.8 nm to about 180 nm, wherein the graphene oxide membrane comprises about 3 to about 30 layers of single-layered graphene oxide flakes, wherein the graphene oxide membrane has a plurality of membrane pores, and wherein the membrane pores are smaller than the substrate pores.
The filtration membrane of claim 1, wherein the single-layered graphene oxide flakes have a size up to about 500 nm.
The filtration membrane of claim 1, wherein about 1.8 nm to about 20 nm.
The filtration membrane of claim 1, wherein about 1.8 nm to about 18 nm.
The filtration membrane of claim 1, wherein to about 10 layers of the single-layered graphene
The filtration membrane of claim 1, wherein about 4 cm 2 or greater.
The filtration membrane of claim 1, wherein filter.
The filtration membrane of claim 1, wherein size of about 20 nm to about 100 nm. 7 the graphene oxide membrane has a thickness of the graphene oxide membrane has a thickness of the graphene oxide membrane comprises about 3 oxide flakes. the graphene oxide membrane has an area of the porous substrate is an anodic aluminum oxide the porous substrate defines pores having a pore
canceled
Embodiments described in the patent, grouped by the materials and process steps they use.
3 materials1 process step
Single-layered graphene oxide powder is dispersed in deionized water to form a GO dispersion. The dispersion is centrifuged to remove aggregated GO material. The dispersion is then diluted by about ten times or more with deionized water. The diluted dispersion is passed through a porous substrate (anodic aluminum oxide, AAO) by vacuum filtration to form a GO membrane. Ultrathin GO membranes of 1.8, 9, and 18 nm thickness were prepared by diluting the 180-nm thick membrane filtration solution by 100, 20, and 10 times respectively, while maintaining total filtration solution volume constant at 25 mL.
Layer stacks claimed or described, ordered top of device to substrate.
filtration membrane
Materials described outside the worked examples.
single-layered graphene oxide powder
deionized water
H₂O
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
graphene oxide membrane thickness (claimed range) | 1.8–180 nm | graphene oxide membrane |
ultrathin GO membrane thickness-1.8 nm example | 1.8 nm |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
Patent drawings and their descriptions. Click a drawing to enlarge it.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A filtration membrane, comprising: a porous substrate having a plurality of substrate pores; and a graphene oxide membrane on the porous substrate, the graphene oxide membrane having a thickness of about 1.8 nm to about 180 nm, wherein the graphene oxide membrane comprises about 3 to about 30 layers of single-layered graphene oxide flakes, wherein the graphene oxide membrane has a plurality of membrane pores, and wherein the membrane pores are smaller than the substrate pores.
The filtration membrane of claim 1, wherein the single-layered graphene oxide flakes have a size up to about 500 nm.
The filtration membrane of claim 1, wherein about 1.8 nm to about 20 nm.
The filtration membrane of claim 1, wherein about 1.8 nm to about 18 nm.
The filtration membrane of claim 1, wherein to about 10 layers of the single-layered graphene
The filtration membrane of claim 1, wherein about 4 cm 2 or greater.
The filtration membrane of claim 1, wherein filter.
The filtration membrane of claim 1, wherein size of about 20 nm to about 100 nm. 7 the graphene oxide membrane has a thickness of the graphene oxide membrane has a thickness of the graphene oxide membrane comprises about 3 oxide flakes. the graphene oxide membrane has an area of the porous substrate is an anodic aluminum oxide the porous substrate defines pores having a pore
canceled
Embodiments described in the patent, grouped by the materials and process steps they use.
3 materials1 process step
Single-layered graphene oxide powder is dispersed in deionized water to form a GO dispersion. The dispersion is centrifuged to remove aggregated GO material. The dispersion is then diluted by about ten times or more with deionized water. The diluted dispersion is passed through a porous substrate (anodic aluminum oxide, AAO) by vacuum filtration to form a GO membrane. Ultrathin GO membranes of 1.8, 9, and 18 nm thickness were prepared by diluting the 180-nm thick membrane filtration solution by 100, 20, and 10 times respectively, while maintaining total filtration solution volume constant at 25 mL.
Layer stacks claimed or described, ordered top of device to substrate.
filtration membrane
Materials described outside the worked examples.
single-layered graphene oxide powder
deionized water
H₂O
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
graphene oxide membrane thickness (claimed range) | 1.8–180 nm | graphene oxide membrane |
ultrathin GO membrane thickness-1.8 nm example | 1.8 nm |
Related documents with shared materials, methods, properties, or citations.
graphene oxide membrane |
ultrathin GO membrane thickness-9 nm example | 9 nm | graphene oxide membrane |
ultrathin GO membrane thickness-18 nm example | 18 nm | graphene oxide membrane |
thick GO membrane thickness-180 nm example | 180 nm | graphene oxide membrane |
GO membrane permeation area | 4 cm2 | graphene oxide membrane |
diffusion activation energy of H2 through 1.8-nm GO membrane | 6.9 kJ/mol | graphene oxide membrane |
diffusion activation energy of CO2 through 1.8-nm GO membrane | 60.2 kJ/mol | graphene oxide membrane |
Raman ID/IG ratio for GO powder | 1.09 | single-layered graphene oxide powder |
Thickness | 6–18.6 nm | — |
Thickness | 1.8–20 nm | — |
Thickness | 1.8–18 nm | — |
Thickness | 20–100 nm | — |
graphene oxide membrane |
ultrathin GO membrane thickness-9 nm example | 9 nm | graphene oxide membrane |
ultrathin GO membrane thickness-18 nm example | 18 nm | graphene oxide membrane |
thick GO membrane thickness-180 nm example | 180 nm | graphene oxide membrane |
GO membrane permeation area | 4 cm2 | graphene oxide membrane |
diffusion activation energy of H2 through 1.8-nm GO membrane | 6.9 kJ/mol | graphene oxide membrane |
diffusion activation energy of CO2 through 1.8-nm GO membrane | 60.2 kJ/mol | graphene oxide membrane |
Raman ID/IG ratio for GO powder | 1.09 | single-layered graphene oxide powder |
Thickness | 6–18.6 nm | — |
Thickness | 1.8–20 nm | — |
Thickness | 1.8–18 nm | — |
Thickness | 20–100 nm | — |
graphene oxide membrane |
ultrathin GO membrane thickness-9 nm example | 9 nm | graphene oxide membrane |
ultrathin GO membrane thickness-18 nm example | 18 nm | graphene oxide membrane |
thick GO membrane thickness-180 nm example | 180 nm | graphene oxide membrane |
GO membrane permeation area | 4 cm2 | graphene oxide membrane |
diffusion activation energy of H2 through 1.8-nm GO membrane | 6.9 kJ/mol | graphene oxide membrane |
diffusion activation energy of CO2 through 1.8-nm GO membrane | 60.2 kJ/mol | graphene oxide membrane |
Raman ID/IG ratio for GO powder | 1.09 | single-layered graphene oxide powder |
Thickness | 6–18.6 nm | — |
Thickness | 1.8–20 nm | — |
Thickness | 1.8–18 nm | — |
Thickness | 20–100 nm | — |
graphene oxide membrane |
ultrathin GO membrane thickness-9 nm example | 9 nm | graphene oxide membrane |
ultrathin GO membrane thickness-18 nm example | 18 nm | graphene oxide membrane |
thick GO membrane thickness-180 nm example | 180 nm | graphene oxide membrane |
GO membrane permeation area | 4 cm2 | graphene oxide membrane |
diffusion activation energy of H2 through 1.8-nm GO membrane | 6.9 kJ/mol | graphene oxide membrane |
diffusion activation energy of CO2 through 1.8-nm GO membrane | 60.2 kJ/mol | graphene oxide membrane |
Raman ID/IG ratio for GO powder | 1.09 | single-layered graphene oxide powder |
Thickness | 6–18.6 nm | — |
Thickness | 1.8–20 nm | — |
Thickness | 1.8–18 nm | — |
Thickness | 20–100 nm | — |