Zinc oxide (ZnO) nanopowders are available as dispersions and powders. These nanoparticles exhibit antibacterial, anti-corrosive, antifungal and UV filtering properties. Zinc is a Block D, Period 4 element while Oxygen is a Block P, Period 2 element. Some of the synonyms of zinc oxide nanoparticles are oxydatum, zinci oxicum, permanent white, ketozinc and oxozinc.
Chemical Properties
The chemical properties of zinc oxide nanoparticles are as per the table below.
Chemical Data
Chemical symbol ZnO
CAS No 1314-13-2
Group Zinc 12
Oxygen 16
Electronic configuration Zinc [Ar] 3d10 4s2
Oxygen [He] 2s2 2p4
Chemical Composition
Element Content (%)
Zinc 80.34
Oxygen 19.6
Physical Properties
The table given below highlights the physical properties of zinc oxide nanopowders.
Properties Metric Imperial
Density 5600 kg/m3 0.202 lb/in3
Molar Mass 81.40 g/mol -
Thermal Properties
Given below are the thermal properties of zinc oxide nanoparticles.
Properties Metric Imperial
Melting point 1975°C 3587°F
Boiling point 2360°C 4280°F
Chemical…show more content… In this process, zinc and oxygen or oxygen mixture vapors are transported and react with each other. This results in formation of ZnO nanostructures. There are numerous ways to generate Zn and oxygen vapor. Decomposition of ZnO is a simple, direct, and easier method; however, it is limited to very high temperatures such as ~1400°C.
Another direct method involves heating of zinc powder under flow of oxygen. It involves relative low growth temperature (500~700°C). However, the ratio between the Zn vapor pressure and oxygen pressure needs to be carefully controlled in order to obtain the desired ZnO nanostructures. It has been seen that the change in this ratio results into a large variation in the morphology (size and geometry) of nanostructures [X.Y.Kong and Z.L.Wang, 2003].
Chemical Reaction of Zinc Acetate Dihydrate and