Editorial Feature

Calcium Oxide (CaO) Nanoparticles - Properties, Applications

This article discusses the properties and applications of calcium oxide nanoparticles. Calcium is a Block S, Group 2, Period 4 element, while oxygen is a Block P, Period 2 element.

Nanoparticles that occur naturally such as volcanic ash, soot from forest fires or the incidental byproducts of combustion processes are physically and chemically heterogeneous and often termed as ultrafine particles.

Calcium oxide nanoparticles are spherical or faceted high surface area oxide magnetic nanostructure particles that serve as adsorbent for decolorizing various dye solutions. Their size can be determined using powder x-ray diffraction studies.

Chemical Properties

The chemical properties of calcium oxide nanoparticles are outlined in the following table.

Chemical Data
Chemical symbol CaO
CAS No. 1305-78-8
Group Calcium – 2
Oxygen - 16
Electronic configuration Calcium – [Ar] 4s2
Oxygen - [He] 2s2 2p4
Chemical Composition
Element Content (%)
Calcium 71.48
Oxygen 28.51

Physical Properties

The physical properties of calcium oxide nanoparticles are given in the following table.

Properties Metric Imperial
Density 3.3 g/cm3 0.119 lb/in3
Molar mass 56.08 g/mol -

Thermal Properties

The thermal properties of calcium oxide nanoparticles are provided in the table below.

Properties Metric Imperial
Melting point 2572°C 4662°F
Boiling point 2850°C 5162°F

Manufacturing Process

Calcium oxide nanoparticles can be synthesized by using solution combustion method.


The key applications of calcium oxide nanoparticles are listed below:

  • Biofuel applications
  • Flame retardants
  • It is also used in the clean up of toxic contamination from chemical warfare.

Source: AZoNano

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