637025

Cobalt(II,III) oxide

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

• Synonym(s): Cobalt tetraoxide, Cobaltic-cobaltous oxide, Tricobalt tetraoxide
• Linear Formula: ~Co₃O₄
• CAS Number: 1308-06-1
• Molecular Weight: 240.80
• MDL number: MFCD00010939
• UNSPSC Code: 12352302
• PubChem Substance ID: 24882820
• NACRES: NA.23

Properties

• 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

Description

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.

Safety Information

• pictograms: GHS08
• signalword: Danger
• hcodes: H334,H350i,H412
• pcodes: P201 - P202 - P261 - P273 - P304 + P340 + P312 - P308 + P313
• 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