ROLE OF CALCINATION TEMPERATURES ON THE STRUCTURAL AND OPTICAL PROPERTIES OF NiO NANOPARTICLES

H. Mohamed Mohaideen (), S. Sheik Fareed () and B. Natarajan
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H. Mohamed Mohaideen: Department of Physics, Mohamed Sathak Engineering College, Kilakarai 623 806, Tamil Nadu, India
S. Sheik Fareed: Department of Physics, Mohamed Sathak Engineering College, Kilakarai 623 806, Tamil Nadu, India
B. Natarajan: PG and Research Department of Physics, Raja Doraisingam Govt. Arts College, Sivagangai 630 561, Tamil Nadu, India

Surface Review and Letters (SRL), 2019, vol. 26, issue 08, 1-11

Abstract: Nickel oxide nanoparticles (NiO NPs) were synthesized through template free sol–gel method. Synthesized particles were calcined at 300∘C, 500∘C and 700∘C for 2h and further the particles were characterized for its thermal, functional, structural, morphological and optical properties. The peak broadening analysis was undertaken in order to calculate the variation in size and strain components of the particles with the calcinations temperature. The Debye–Scherer, Williamson–Hall and Size-strain plot methods were employed in peak broadening analysis and were compared with TEM results. All the NiO NPs crystallite size and lattice strain value were found to be in good agreement with all the models. The TEM analysis revealed that the calcinations at 700∘C NiO NPs have sphere like structure of less than 20nm particles size value. The strong peak observed at 360.5nm bandgap emission relates to the bandgap of 3.44eV which is because of the near band edge emission.

Keywords: Nickel oxide nanoparticles; sol–gel method; Williamson–Hall analysis; transmission electron microscope (search for similar items in EconPapers)
Date: 2019
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DOI: 10.1142/S0218625X19500434

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