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637025

Sigma-Aldrich

Cobalt(II,III) oxide

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

Synonym(s):

Cobalt tetraoxide, Cobaltic-cobaltous oxide, Tricobalt tetraoxide

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About This Item

Linear Formula:
~Co3O4
CAS Number:
Molecular Weight:
240.80
MDL number:
UNSPSC Code:
12352302
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

signalword

Danger

Hazard Classifications

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

Storage Class

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

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable


Certificates of Analysis (COA)

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