Patent
US 9,815,701SYNTHESIS OF REDUCED GRAPHENE OXIDE NANOPARTICLES
MANAL AHMED GASMELSEED AWAD, AWATIF AHMED HENDI, KHALID MUSTAFA OSMAN ORTASHI, AMEL LAREF et al.
King Saud University·US
Copyright © 2026 Matter42. All rights reserved.
Patent
Atlas literature
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US 9,815,701Patent 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 for synthesizing reduced graphene oxide, comprising the steps of: selecting a carbonaceous material, wherein the carbonaceous material consists of soot obtained directly from the residual soot formed on cooking grills; mixing the soot with at least one acid to obtain a solution; adding a first oxidant to the solution to provide a suspension, wherein the first oxidant is potassium permanganate; stirring the suspension while maintaining a temperature of the suspension at about 35 ° C for 10 minutes; raising the temperature of the suspension to [[about]] a constant 60 ° C for 15 minutes while adding deionized water to the suspension; adding a second oxidant to the suspension to provide reduced graphene oxide nanoparticles, wherein the second oxidant is hydrogen peroxide; [[and]] isolating the reduced graphene oxide nanoparticles, wherein the reduced graphene oxide nanoparticles are isolated by centrifugation; and washing the reduced graphene oxide nanoparticles with deionized water and 5% HCl solution and drying the nanoparticles at about 100 °C.
The method for synthesizing reduced graphene oxide nanoparticles according to claim 1, wherein the at least one acid comprises an acid mixture including sulfuric acid and phosphoric acid.
Reduced graphene oxide nanoparticles produced according to the method of claim 1. withdrawn
A light transparent electrode comprising the method of claim 1. 4 withdrawn according to claim 7, having a resistance of 108 to reduced graphene oxide prepared according to
Application Serial No.: 15/442, 606 Attorney Docket No. 32693.90 Art Unit: Confirmation No. 8198
canceled
Claims 5 and 6. canceled
canceled
The reduced graphene oxide nanoparticles 1010 Ohm. withdrawn
Embodiments described in the patent, grouped by the materials and process steps they use.
6 materials1 process step
Soot collected from a griddle used to bake Abray (a traditional Sudanese drink) was used as carbonaceous starting material. About 2.5 g soot was mixed with 54 mL H₂SO₄ and 6 mL H₃PO₄ and stirred for 5 min. Then 8 g KMnO₄ was slowly added to form a suspension, stirred at 35 °C for 10 min, then temperature raised to constant 60 °C for 15 min while water was added continuously. Deionized water was added to bring volume to 150 mL, then ~8 mL H₂O₂ added after 5 min. Product was centrifuged, washed with deionized water and 5% HCl, and dried at 100 °C. Nanoparticles were characterized by TEM (JEM-1011, JEOL), XRD (Bruker D₈ ADVANCE), and Zetasizer (Malvern ZEN₃₆₀₀). Average particle size 174.2 nm; XRD 2θ peaks at 20.003, 21.55, and 25.133; particle size distribution peaks at ~2.0 nm (61.3%), 269.3 nm (20.4%), and 4990 nm (14.5%). TEM showed spherical or elongated-spherical particles ~1–200 nm. EDX showed dominant carbon and oxygen peaks. Electrical measurements made from pressed disk samples over 20 Hz–1 MHz frequency range at room temperature.
Layer stacks claimed or described, ordered top of device to substrate.
light transparent electrode
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Particle Size Mean | 174.2 nm | rGO |
Xrd Peak Two Theta |
Patent
Atlas literature
Patent
US 9,815,701Patent 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 for synthesizing reduced graphene oxide, comprising the steps of: selecting a carbonaceous material, wherein the carbonaceous material consists of soot obtained directly from the residual soot formed on cooking grills; mixing the soot with at least one acid to obtain a solution; adding a first oxidant to the solution to provide a suspension, wherein the first oxidant is potassium permanganate; stirring the suspension while maintaining a temperature of the suspension at about 35 ° C for 10 minutes; raising the temperature of the suspension to [[about]] a constant 60 ° C for 15 minutes while adding deionized water to the suspension; adding a second oxidant to the suspension to provide reduced graphene oxide nanoparticles, wherein the second oxidant is hydrogen peroxide; [[and]] isolating the reduced graphene oxide nanoparticles, wherein the reduced graphene oxide nanoparticles are isolated by centrifugation; and washing the reduced graphene oxide nanoparticles with deionized water and 5% HCl solution and drying the nanoparticles at about 100 °C.
The method for synthesizing reduced graphene oxide nanoparticles according to claim 1, wherein the at least one acid comprises an acid mixture including sulfuric acid and phosphoric acid.
Reduced graphene oxide nanoparticles produced according to the method of claim 1. withdrawn
A light transparent electrode comprising the method of claim 1. 4 withdrawn according to claim 7, having a resistance of 108 to reduced graphene oxide prepared according to
Application Serial No.: 15/442, 606 Attorney Docket No. 32693.90 Art Unit: Confirmation No. 8198
canceled
Claims 5 and 6. canceled
canceled
The reduced graphene oxide nanoparticles 1010 Ohm. withdrawn
Embodiments described in the patent, grouped by the materials and process steps they use.
6 materials1 process step
Soot collected from a griddle used to bake Abray (a traditional Sudanese drink) was used as carbonaceous starting material. About 2.5 g soot was mixed with 54 mL H₂SO₄ and 6 mL H₃PO₄ and stirred for 5 min. Then 8 g KMnO₄ was slowly added to form a suspension, stirred at 35 °C for 10 min, then temperature raised to constant 60 °C for 15 min while water was added continuously. Deionized water was added to bring volume to 150 mL, then ~8 mL H₂O₂ added after 5 min. Product was centrifuged, washed with deionized water and 5% HCl, and dried at 100 °C. Nanoparticles were characterized by TEM (JEM-1011, JEOL), XRD (Bruker D₈ ADVANCE), and Zetasizer (Malvern ZEN₃₆₀₀). Average particle size 174.2 nm; XRD 2θ peaks at 20.003, 21.55, and 25.133; particle size distribution peaks at ~2.0 nm (61.3%), 269.3 nm (20.4%), and 4990 nm (14.5%). TEM showed spherical or elongated-spherical particles ~1–200 nm. EDX showed dominant carbon and oxygen peaks. Electrical measurements made from pressed disk samples over 20 Hz–1 MHz frequency range at room temperature.
Layer stacks claimed or described, ordered top of device to substrate.
light transparent electrode
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Particle Size Mean | 174.2 nm | rGO |
Xrd Peak Two Theta |
Patent
Atlas literature
Patent
US 9,815,701Patent 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 for synthesizing reduced graphene oxide, comprising the steps of: selecting a carbonaceous material, wherein the carbonaceous material consists of soot obtained directly from the residual soot formed on cooking grills; mixing the soot with at least one acid to obtain a solution; adding a first oxidant to the solution to provide a suspension, wherein the first oxidant is potassium permanganate; stirring the suspension while maintaining a temperature of the suspension at about 35 ° C for 10 minutes; raising the temperature of the suspension to [[about]] a constant 60 ° C for 15 minutes while adding deionized water to the suspension; adding a second oxidant to the suspension to provide reduced graphene oxide nanoparticles, wherein the second oxidant is hydrogen peroxide; [[and]] isolating the reduced graphene oxide nanoparticles, wherein the reduced graphene oxide nanoparticles are isolated by centrifugation; and washing the reduced graphene oxide nanoparticles with deionized water and 5% HCl solution and drying the nanoparticles at about 100 °C.
The method for synthesizing reduced graphene oxide nanoparticles according to claim 1, wherein the at least one acid comprises an acid mixture including sulfuric acid and phosphoric acid.
Reduced graphene oxide nanoparticles produced according to the method of claim 1. withdrawn
A light transparent electrode comprising the method of claim 1. 4 withdrawn according to claim 7, having a resistance of 108 to reduced graphene oxide prepared according to
Application Serial No.: 15/442, 606 Attorney Docket No. 32693.90 Art Unit: Confirmation No. 8198
canceled
Claims 5 and 6. canceled
canceled
The reduced graphene oxide nanoparticles 1010 Ohm. withdrawn
Embodiments described in the patent, grouped by the materials and process steps they use.
6 materials1 process step
Soot collected from a griddle used to bake Abray (a traditional Sudanese drink) was used as carbonaceous starting material. About 2.5 g soot was mixed with 54 mL H₂SO₄ and 6 mL H₃PO₄ and stirred for 5 min. Then 8 g KMnO₄ was slowly added to form a suspension, stirred at 35 °C for 10 min, then temperature raised to constant 60 °C for 15 min while water was added continuously. Deionized water was added to bring volume to 150 mL, then ~8 mL H₂O₂ added after 5 min. Product was centrifuged, washed with deionized water and 5% HCl, and dried at 100 °C. Nanoparticles were characterized by TEM (JEM-1011, JEOL), XRD (Bruker D₈ ADVANCE), and Zetasizer (Malvern ZEN₃₆₀₀). Average particle size 174.2 nm; XRD 2θ peaks at 20.003, 21.55, and 25.133; particle size distribution peaks at ~2.0 nm (61.3%), 269.3 nm (20.4%), and 4990 nm (14.5%). TEM showed spherical or elongated-spherical particles ~1–200 nm. EDX showed dominant carbon and oxygen peaks. Electrical measurements made from pressed disk samples over 20 Hz–1 MHz frequency range at room temperature.
Layer stacks claimed or described, ordered top of device to substrate.
light transparent electrode
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Particle Size Mean | 174.2 nm | rGO |
Xrd Peak Two Theta |
Patent
Atlas literature
Patent
US 9,815,701Patent 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 for synthesizing reduced graphene oxide, comprising the steps of: selecting a carbonaceous material, wherein the carbonaceous material consists of soot obtained directly from the residual soot formed on cooking grills; mixing the soot with at least one acid to obtain a solution; adding a first oxidant to the solution to provide a suspension, wherein the first oxidant is potassium permanganate; stirring the suspension while maintaining a temperature of the suspension at about 35 ° C for 10 minutes; raising the temperature of the suspension to [[about]] a constant 60 ° C for 15 minutes while adding deionized water to the suspension; adding a second oxidant to the suspension to provide reduced graphene oxide nanoparticles, wherein the second oxidant is hydrogen peroxide; [[and]] isolating the reduced graphene oxide nanoparticles, wherein the reduced graphene oxide nanoparticles are isolated by centrifugation; and washing the reduced graphene oxide nanoparticles with deionized water and 5% HCl solution and drying the nanoparticles at about 100 °C.
The method for synthesizing reduced graphene oxide nanoparticles according to claim 1, wherein the at least one acid comprises an acid mixture including sulfuric acid and phosphoric acid.
Reduced graphene oxide nanoparticles produced according to the method of claim 1. withdrawn
A light transparent electrode comprising the method of claim 1. 4 withdrawn according to claim 7, having a resistance of 108 to reduced graphene oxide prepared according to
Application Serial No.: 15/442, 606 Attorney Docket No. 32693.90 Art Unit: Confirmation No. 8198
canceled
Claims 5 and 6. canceled
canceled
The reduced graphene oxide nanoparticles 1010 Ohm. withdrawn
Embodiments described in the patent, grouped by the materials and process steps they use.
6 materials1 process step
Soot collected from a griddle used to bake Abray (a traditional Sudanese drink) was used as carbonaceous starting material. About 2.5 g soot was mixed with 54 mL H₂SO₄ and 6 mL H₃PO₄ and stirred for 5 min. Then 8 g KMnO₄ was slowly added to form a suspension, stirred at 35 °C for 10 min, then temperature raised to constant 60 °C for 15 min while water was added continuously. Deionized water was added to bring volume to 150 mL, then ~8 mL H₂O₂ added after 5 min. Product was centrifuged, washed with deionized water and 5% HCl, and dried at 100 °C. Nanoparticles were characterized by TEM (JEM-1011, JEOL), XRD (Bruker D₈ ADVANCE), and Zetasizer (Malvern ZEN₃₆₀₀). Average particle size 174.2 nm; XRD 2θ peaks at 20.003, 21.55, and 25.133; particle size distribution peaks at ~2.0 nm (61.3%), 269.3 nm (20.4%), and 4990 nm (14.5%). TEM showed spherical or elongated-spherical particles ~1–200 nm. EDX showed dominant carbon and oxygen peaks. Electrical measurements made from pressed disk samples over 20 Hz–1 MHz frequency range at room temperature.
Layer stacks claimed or described, ordered top of device to substrate.
light transparent electrode
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Particle Size Mean | 174.2 nm | rGO |
Xrd Peak Two Theta |
| 20.003 deg |
rGO |
Xrd Peak Two Theta | 21.55 deg | rGO |
Xrd Peak Two Theta | 25.133 deg | rGO |
Fet Resistance | — | rGO |
Thickness | 1–200 nm | — |
| 20.003 deg |
rGO |
Xrd Peak Two Theta | 21.55 deg | rGO |
Xrd Peak Two Theta | 25.133 deg | rGO |
Fet Resistance | — | rGO |
Thickness | 1–200 nm | — |
| 20.003 deg |
rGO |
Xrd Peak Two Theta | 21.55 deg | rGO |
Xrd Peak Two Theta | 25.133 deg | rGO |
Fet Resistance | — | rGO |
Thickness | 1–200 nm | — |
| 20.003 deg |
rGO |
Xrd Peak Two Theta | 21.55 deg | rGO |
Xrd Peak Two Theta | 25.133 deg | rGO |
Fet Resistance | — | rGO |
Thickness | 1–200 nm | — |