Open AccessNanostructure and Optical Properties of Fe3O4: Effect of Calcination Temperature and Dwelling Time
Author(s) -
I Putu Tedy Indrayana,
L. A. Tjuana,
Margaretha Tabita Tuny,
Kurnia
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1341/8/082044
Subject(s) - calcination , materials science , crystallite , nanoparticle , nanostructure , coprecipitation , spinel , octahedron , crystal structure , chemical engineering , nanotechnology , mineralogy , crystallography , metallurgy , chemistry , catalysis , organic chemistry , engineering
In this work, we reported the nanostructure and optical properties of the Fe 3 O 4 nanoparticles. The Fe 3 O 4 have been synthesized from local iron sand Halmahera Utara by using the coprecipitation method at a temperature of 80°C and NaOH concentration of 3M. The nanoparticles were calcined at 150°C and 250°C for 4 hours consecutively, while the calcination dwelling time was 2 hours and 4 hours at a temperature of 250°C. The results show that a formation of Fe 3 O 4 nanoparticles with a spinel crystal structure. The lattice parameter of nanoparticles decreases with an increase of calcination temperature and dwelling time due to higher thermal energy driving the atom to move closer to each other. Hence, the crystallite size of the nanoparticles increases due to the expansion process to the grain of the nanoparticles. The optical gap energy of the nanoparticles decreases due to the formation of a larger particle. It also confirms that the existence of Fe 3+ -O and Fe 2+ -O bonds in the nanoparticles which are characteristic functional group bond of Fe 3 O 4 in the tetrahedral and octahedral sublattice. This result can prove that a higher calcination temperature and longer dwelling time can improve the nanostructure and optical properties of Fe 3 O 4 .