Editorial Feature

Nickel Oxide (NiO) Nanoparticles - Properties, Applications

The prospects for using nanomaterials with diameters of <100 nm in number of applications is being widely researched today across multiple domains such as biology, physics, chemistry, cosmetics, optical components, pharmaceutical drug manufacture, polymer science, mechanical engineering, and toxicology.

This article discusses the properties and applications of nickel oxide nanoparticles. Nickel is a Block D, Period 4 element, while oxygen is a Block P, Period 2 element. Nickel oxide nanoparticles appear in green powder form, and are graded as very toxic. They can cause an allergic skin reaction, prolonged harmful effects to aquatic life, and possible damage to organs due to prolonged or repeated exposure.

Chemical Properties

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

Chemical Data
Chemical symbol NiO
CAS No. 1313-99-1
Group Nickel 4
Oxygen 16
Electronic configuration Nickel [Ar]3d8 4s2
Oxygen [He] 2s2 2p4
Chemical Composition
Element Content (%)
Nickel 78.55
Oxygen 21.40

Physical Properties

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

Properties Metric Imperial
Density 6.67 g/cm3 0.240 lb/in3
Molar mass 74.71 g/mol -

Thermal Properties

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

Properties Metric Imperial
Melting point 1955°C 3551°F

Manufacturing Process

Nickel oxide nanoparticles can be manufactured by thermal decomposition of freshly prepared nickel hydroxife by sol gel route at 300°C (572°F). The nickel oxide nanoparticles created using this method can be characterized using x-ray diffractometer and vibrating sample magnetometer.


The key applications of nickel oxide nanoparticles are as follows:

  • In preparation of nickel cermet for the anode layer of solid oxide fuel cells
  • In lithium nickel oxide cathodes for lithium ion microbatteries
  • In electrochromic coatings, plastics and textiles
  • In nanowires, nanofibers and specific alloy and catalyst applications
  • As a catalyst and as anti-ferromagnetic layers
  • In light weight structural components in aerospace
  • Adhesive and coloring agents for enamels
  • In active optical filters
  • In ceramic structures
  • In automotive rear-view mirrors with adjustable reflectance
  • In cathode materials for alkaline batteries
  • Electro chromic materials
  • Energy efficient smart windows
  • P-type transparent conductive films
  • Materials for gas or temperature sensors, such as CO sensor, H2 sensor, and formaldehyde sensors
  • As a counter electrodes

Source: AZoNano


  1. Abdul Rehman Abdul Rehman Islamic Republic of Pakistan says:

    What is the shelf life of nickel oxide

  2. Abdul Rehman Abdul Rehman Islamic Republic of Pakistan says:

    what is the shelf life of nickel oxide

The opinions expressed here are the views of the writer and do not necessarily reflect the views and opinions of AZoNano.com.

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