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777684

Sigma-Aldrich

Reduced graphene oxide

Synonym(s):
rGO
Linear Formula:
CxOyHz
NACRES:
NA.23

description

chemically reduced

form

powder

composition

Carbon, ≥75 wt. %
Nitrogen, >5 wt. %
Oxygen, <22 wt. %

surface area

450 m2/g
BET surf. area 450 m2/g

conductivity

>600 S/m

solubility

water: insoluble

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This Item
900197805424806579
form

powder

form

dispersion in H2O

form

powder

form

powder

Quality Level

100

Quality Level

100

Quality Level

100

Quality Level

100

description

chemically reduced

description

-

description

chemically reduced by hydrizine

description

-

composition

Carbon, ≥75 wt. %

composition

-

composition

Carbon, >75% , Nitrogen, <5%

composition

Carbon, >65 wt. % , Nitrogen, >8 wt. %

surface area

BET surf. area 450 m2/g

surface area

-

surface area

BET surf. area 103 m2/g

surface area

-

conductivity

>600 S/m

conductivity

-

conductivity

7111 S/m (pressed pallet)

conductivity

-

General description

The structure of graphene oxide is similar to graphene containing residual oxygen, heteroatoms and structural defects. Reduced graphene oxide (rGO) can be extracted as thin film from an aqueous solution of graphite oxide (GO) slurry. Many modern procedures for the synthesis of GO are based on the Hummers method, in which graphite is oxidized by a solution of potassium permanganate in sulfuric acid. Reduction of GO using hydrazine has been reported. However, hydrazine is highly toxic and can potentially functionalize GO with nitrogen heteroatoms. Because of these issues, alternatives to hydrazine including NaBH4, ascorbic acid, and HI, among others have been used for the reduction of GO. GO can be reduced as a thin film or in an aqueous solution. Reduction methods have been recently reviewed.

Application

The spin-coated reduced graphene oxide (rGO) thin films have been used as annode buffer layer to fabricate bulk heterojunction org. solar cells. PEGylated rGO may be used as:
  • chemical sensors, biosensors
  • as transparent electrodes in light emitting diodes (LEDs) and ITOs
  • in lithium ion batteries.

Preparation Note

  • Reduction method: Chemically reduced
  • Color: Black
  • Odor: Odorless
  • Solubility: Insoluble
  • Dispersability: It can be dispersed at low concentrations (<0.1mg/mL) in NPM, DMSO, DMF
  • Electrical conductivity: > 600S/m
  • BET surface area: 450 m2/g

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


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