Patent
US 10,508,037METHOD FOR CONTINUOUSLY PREPARING GRAPHENE OXIDE
Songfeng PEI
US
Copyright © 2026 Matter42. All rights reserved.
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 method of continuously preparing graphene oxide nanoplatelet, characterized in that: the method comprises the steps of: providing a graphite raw material selected from the group consisting of flexible graphite paper coil material, flexible graphite strip material and carbon fiber wire material; through driving the graphite raw material by a feeding device, sequentially processing a two-step treatment of electrochemical intercalation and electrolytic oxidation exfoliation respectively; obtaining a graphene oxide nanoplatelet which is dispersed in electrolyte; and processing treatment of filtering, washing and drying and then obtaining a graphene oxide powder material. Previously presented
The method of continuously preparing graphene oxide nanoplatelet according to claim 1, characterized in that, the treatment of electrochemical intercalation comprises a first process of electrochemical intercalation i -s carried out in a first device, and the treatment of electrolytic oxidation exfoliation comprises a second process of electrochemical electrolysis for oxidation and exfoliation carried out in a second device; the graphite raw material is used as an anode and an inert electrode material is used as a cathode to conduct electrochemical reactions in both of the first device and the second device, and the graphene oxide nanoplatelet is formed in the second device. Previously presented
The method of continuously preparing graphene oxide nanoplatelet according to claim 1, characterized in that, an oxidation degree of the graphene oxide nanoplatelet which is exfoliated and dispersed in the electrolyte has a corresponding relation with the voltage used in the electrolysis process, if the voltage increases, the oxidation degree of the graphene oxide nanoplatelet increases, the product has a carbon to oxygen ratio ranging from 1:1 to 10:1. Previously presented
Canceled
Materials described outside the worked examples.
flexible graphite paper coil material
flexible graphite strip material
carbon fiber wire material
graphene oxide nanoplatelet
concentrated sulfuric acid
H₂SO₄
concentrated nitric acid
HNO₃
chlorosulfonic acid
ClSO₃H
concentrated phosphoric acid
H₃PO₄
hydrochloric acid
HCl
sodium sulfate
Na₂SO₄
potassium sulfate
K₂SO₄
sodium chloride
NaCl
amine nitrate
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Carbon To Oxygen Ratio | 1–10 | graphene oxide nanoplatelet |
Yield To Weight Ratio | ≥ 90 | graphene oxide nanoplatelet |
Single Layer Rate | ≥ 50 | graphene oxide nanoplatelet |
Voltage | 0–1000 V | — |
Voltage | 10–1000 V | — |
Thickness | 0.5–5 nm | — |
Voltage | 0–150 V | — |
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 method of continuously preparing graphene oxide nanoplatelet, characterized in that: the method comprises the steps of: providing a graphite raw material selected from the group consisting of flexible graphite paper coil material, flexible graphite strip material and carbon fiber wire material; through driving the graphite raw material by a feeding device, sequentially processing a two-step treatment of electrochemical intercalation and electrolytic oxidation exfoliation respectively; obtaining a graphene oxide nanoplatelet which is dispersed in electrolyte; and processing treatment of filtering, washing and drying and then obtaining a graphene oxide powder material. Previously presented
The method of continuously preparing graphene oxide nanoplatelet according to claim 1, characterized in that, the treatment of electrochemical intercalation comprises a first process of electrochemical intercalation i -s carried out in a first device, and the treatment of electrolytic oxidation exfoliation comprises a second process of electrochemical electrolysis for oxidation and exfoliation carried out in a second device; the graphite raw material is used as an anode and an inert electrode material is used as a cathode to conduct electrochemical reactions in both of the first device and the second device, and the graphene oxide nanoplatelet is formed in the second device. Previously presented
The method of continuously preparing graphene oxide nanoplatelet according to claim 1, characterized in that, an oxidation degree of the graphene oxide nanoplatelet which is exfoliated and dispersed in the electrolyte has a corresponding relation with the voltage used in the electrolysis process, if the voltage increases, the oxidation degree of the graphene oxide nanoplatelet increases, the product has a carbon to oxygen ratio ranging from 1:1 to 10:1. Previously presented
Canceled
Materials described outside the worked examples.
flexible graphite paper coil material
flexible graphite strip material
carbon fiber wire material
graphene oxide nanoplatelet
concentrated sulfuric acid
H₂SO₄
concentrated nitric acid
HNO₃
chlorosulfonic acid
ClSO₃H
concentrated phosphoric acid
H₃PO₄
hydrochloric acid
HCl
sodium sulfate
Na₂SO₄
potassium sulfate
K₂SO₄
sodium chloride
NaCl
amine nitrate
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Carbon To Oxygen Ratio | 1–10 | graphene oxide nanoplatelet |
Yield To Weight Ratio | ≥ 90 | graphene oxide nanoplatelet |
Single Layer Rate | ≥ 50 | graphene oxide nanoplatelet |
Voltage | 0–1000 V | — |
Voltage | 10–1000 V | — |
Thickness | 0.5–5 nm | — |
Voltage | 0–150 V | — |
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 method of continuously preparing graphene oxide nanoplatelet, characterized in that: the method comprises the steps of: providing a graphite raw material selected from the group consisting of flexible graphite paper coil material, flexible graphite strip material and carbon fiber wire material; through driving the graphite raw material by a feeding device, sequentially processing a two-step treatment of electrochemical intercalation and electrolytic oxidation exfoliation respectively; obtaining a graphene oxide nanoplatelet which is dispersed in electrolyte; and processing treatment of filtering, washing and drying and then obtaining a graphene oxide powder material. Previously presented
The method of continuously preparing graphene oxide nanoplatelet according to claim 1, characterized in that, the treatment of electrochemical intercalation comprises a first process of electrochemical intercalation i -s carried out in a first device, and the treatment of electrolytic oxidation exfoliation comprises a second process of electrochemical electrolysis for oxidation and exfoliation carried out in a second device; the graphite raw material is used as an anode and an inert electrode material is used as a cathode to conduct electrochemical reactions in both of the first device and the second device, and the graphene oxide nanoplatelet is formed in the second device. Previously presented
The method of continuously preparing graphene oxide nanoplatelet according to claim 1, characterized in that, an oxidation degree of the graphene oxide nanoplatelet which is exfoliated and dispersed in the electrolyte has a corresponding relation with the voltage used in the electrolysis process, if the voltage increases, the oxidation degree of the graphene oxide nanoplatelet increases, the product has a carbon to oxygen ratio ranging from 1:1 to 10:1. Previously presented
Canceled
Materials described outside the worked examples.
flexible graphite paper coil material
flexible graphite strip material
carbon fiber wire material
graphene oxide nanoplatelet
concentrated sulfuric acid
H₂SO₄
concentrated nitric acid
HNO₃
chlorosulfonic acid
ClSO₃H
concentrated phosphoric acid
H₃PO₄
hydrochloric acid
HCl
sodium sulfate
Na₂SO₄
potassium sulfate
K₂SO₄
sodium chloride
NaCl
amine nitrate
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Carbon To Oxygen Ratio | 1–10 | graphene oxide nanoplatelet |
Yield To Weight Ratio | ≥ 90 | graphene oxide nanoplatelet |
Single Layer Rate | ≥ 50 | graphene oxide nanoplatelet |
Voltage | 0–1000 V | — |
Voltage | 10–1000 V | — |
Thickness | 0.5–5 nm | — |
Voltage | 0–150 V | — |
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 method of continuously preparing graphene oxide nanoplatelet, characterized in that: the method comprises the steps of: providing a graphite raw material selected from the group consisting of flexible graphite paper coil material, flexible graphite strip material and carbon fiber wire material; through driving the graphite raw material by a feeding device, sequentially processing a two-step treatment of electrochemical intercalation and electrolytic oxidation exfoliation respectively; obtaining a graphene oxide nanoplatelet which is dispersed in electrolyte; and processing treatment of filtering, washing and drying and then obtaining a graphene oxide powder material. Previously presented
The method of continuously preparing graphene oxide nanoplatelet according to claim 1, characterized in that, the treatment of electrochemical intercalation comprises a first process of electrochemical intercalation i -s carried out in a first device, and the treatment of electrolytic oxidation exfoliation comprises a second process of electrochemical electrolysis for oxidation and exfoliation carried out in a second device; the graphite raw material is used as an anode and an inert electrode material is used as a cathode to conduct electrochemical reactions in both of the first device and the second device, and the graphene oxide nanoplatelet is formed in the second device. Previously presented
The method of continuously preparing graphene oxide nanoplatelet according to claim 1, characterized in that, an oxidation degree of the graphene oxide nanoplatelet which is exfoliated and dispersed in the electrolyte has a corresponding relation with the voltage used in the electrolysis process, if the voltage increases, the oxidation degree of the graphene oxide nanoplatelet increases, the product has a carbon to oxygen ratio ranging from 1:1 to 10:1. Previously presented
Canceled
Materials described outside the worked examples.
flexible graphite paper coil material
flexible graphite strip material
carbon fiber wire material
graphene oxide nanoplatelet
concentrated sulfuric acid
H₂SO₄
concentrated nitric acid
HNO₃
chlorosulfonic acid
ClSO₃H
concentrated phosphoric acid
H₃PO₄
hydrochloric acid
HCl
sodium sulfate
Na₂SO₄
potassium sulfate
K₂SO₄
sodium chloride
NaCl
amine nitrate
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Carbon To Oxygen Ratio | 1–10 | graphene oxide nanoplatelet |
Yield To Weight Ratio | ≥ 90 | graphene oxide nanoplatelet |
Single Layer Rate | ≥ 50 | graphene oxide nanoplatelet |
Voltage | 0–1000 V | — |
Voltage | 10–1000 V | — |
Thickness | 0.5–5 nm | — |
Voltage | 0–150 V | — |