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777684

Sigma-Aldrich

Reduced graphene oxide

Synonym(s):

rGO

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About This Item

Linear Formula:
CxOyHz
UNSPSC Code:
12352103
NACRES:
NA.23

description

chemically reduced

Quality Level

100

form

powder

composition

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

surface area

450 m2/g

conductivity

>600 S/m

solubility

water: insoluble

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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

Webinar: Graphene-Based Nanomaterials for Versatile Biosensors
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

11 - Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

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Certificates of Analysis (COA)

Lot/Batch Number
0000370046
0000329511
MKCW1219
0000370046
0000329511

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Somayeh Mousavi Nodoushan et al.
Biosensors & bioelectronics, 127, 221-228 (2019-01-10)
Detection of staphylococcal enterotoxin B (SEB) as a bacterial toxin causing severe food poisoning is of great importance. Herein, we developed an electrochemical aptasensor for SEB detection using a screen printed electrode modified with reduced graphene oxide (rGO) and gold
Goki Eda et al.
Nature nanotechnology, 3(5), 270-274 (2008-07-26)
The integration of novel materials such as single-walled carbon nanotubes and nanowires into devices has been challenging, but developments in transfer printing and solution-based methods now allow these materials to be incorporated into large-area electronics. Similar efforts are now being
Monique C P Mendonça et al.
Nanomaterials (Basel, Switzerland), 9(6) (2019-06-15)
Graphene-based nanomaterials (GBNs) possess unique physicochemical properties, allowing a wide range of applications in physical, chemical, and biomedical fields. Although GBNs are broadly used, information about their adverse effects on ecosystem health, especially in the terrestrial environment, is limited. Therefore
Rosa Garriga et al.
Nanomaterials (Basel, Switzerland), 10(8) (2020-08-23)
Carbon nanomaterials have attracted increasing attention in biomedicine recently to be used as drug nanocarriers suitable for medical treatments, due to their large surface area, high cellular internalization and preferential tumor accumulation, that enable these nanomaterials to transport chemotherapeutic agents
Zhang; Liming;
Journal of Material Chemistry B: Materials for Biology and Medicine, 1(6), 749-755 (2013)

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