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Sigma-Aldrich

Cobalt(II,III) oxide

nanopowder, <50 nm particle size (SEM), 99.5% trace metals basis

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Synonym(s):
Cobalt tetraoxide, Cobaltic-cobaltous oxide, Tricobalt tetraoxide
Linear Formula:
~Co3O4
CAS Number:
Molecular Weight:
240.80
MDL number:
PubChem Substance ID:
NACRES:
NA.23

Quality Level

Assay

99.5% trace metals basis

form

nanopowder

surface area

40-70 m2/g , typical range

particle size

<50 nm (SEM)

mp

895 °C (dec.) (lit.)

density

6.11 g/mL at 25 °C (lit.)

bulk density

0.57 g/mL

application(s)

battery manufacturing

SMILES string

O=[Co].O=[Co]O[Co]=O

InChI

1S/3Co.4O

InChI key

LBFUKZWYPLNNJC-UHFFFAOYSA-N

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General description

Cobalt oxide is a p-type semiconductor thatbelongs to the normal spinel crystal structure with cubic close packing ofoxide ions. It has variable oxidation states and multiple band gapenergies (2.28eV and 1.57eV). It is paramagnetic at room temperature.

Application

Cobalt(II,III) oxide nanoparticles can be used:

  • To modify the glassycarbon electrode for the detection of As(III) at nanomolar concentrationrange.
  • To prepare a robust photocatalyst along withcarbon nanospheres for dye degradation and hydrogen evolution reaction.
  • As an electrodematerial in the preparation of supercapacitors.

Pictograms

Health hazard

Signal Word

Danger

Hazard Statements

Hazard Classifications

Aquatic Chronic 3 - Carc. 1A Inhalation - Resp. Sens. 1

Storage Class Code

6.1C - Combustible, acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


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