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Impact of Annealing Temperature on Structural, Optical, and Morphological Properties of ZnO Nanoparticles Synthesized by a Simple Precipitation Method


Lalita Deshmukh* and Kalyan Chavan   Pages 1 - 7 ( 7 )


Objective: Herein, we report zinc oxide (ZnO) nanoparticles (NPs) synthesized by a simple precipitation method using zinc acetate dihydrate (Zn(CH3CO2)2. 2H2O) and sodium hydroxide (NaOH) precursors in aqueous media.

Method: As synthesized material was annealed at different temperatures to check phase formation and its purity.

Result: At room temperature sample shows the formation of zinc hydroxide and at high temperature (100, 200 & 300 oC) shows the formation of ZnO. Synthesized materials were analyzed by different techniques. X-ray diffraction analysis shows the formation of hexagonal crystal structure. Morphological features were analyzed by the SEM technique which shows agglomerated nanoparticles.

Conclusion: The optical properties of ZnO were studied by using UV analysis and showed intrinsic excitonic transition property of the ZnO semiconductor. Further, with an increase in annealing temperature crystalline size, agglomeration of nanoparticles found to be increased whereas band gap decreases.


Zinc Oxide (ZnO), NPs, Zinc Hydroxide, sodium hydroxides, SEM images, XRD


Ahmednagar college, Station Road, Physics Department , Ahmednagar college, Station Road, Physics Department

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