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NanoMat 2018
Nano Research & Applications
ISSN: 2471-9838
Page 88
April 26-27, 2018
Rome, Italy
17
th
Edition of International Conference on
Emerging Trends in
Materials Science and
Nanotechnology
Z
inc ferrite nano-crystals were successfully synthesized from
its stoichiometric metal nitrates and glycine mixtures, using
a microwave assisted combustion method. The as prepared
sample was subjected to high energy ball milling for different
periods of time. Structural and magnetic properties have been
investigated by XRD, FTIR, VSM and Mössbauer spectroscopy.
Results revealed that the as-prepared sample is a monophase
zinc ferrite possesses high crystallinity. A minor of α-Fe
2
O
3
phase is detected after milling. The average crystallite size of
the as prepared (AP) ZnFe
2
O
4
powder is about 27 nm. This value
decreased with milling time reach to around 9 nm after 330 min.
FTIR spectra showed two absorption bands in the zinc ferrite
structure related to octahedral and tetrahedral sites in the range
of 400-600 cm
-1
. The room temperatureMössbauer spectra of the
samples are representing the coexistence of both ferrimagnetic
ordering and superparamagnetic phases. The magnetic
measurement at room temperature confirmed the ferrimagnetic
behavior of the samples. The saturation magnetization value of
the as prepared ZnFe
2
O
4
is 47 emu/g was observed and its value
decreased to 29 emu/g after 330 min of mill. The catalytic activity
for the as prepared and milled samples was carried out using
dehydrogenation – dehydration of isopropyl alcohol. The results
revealed that the samples are active and highly selective towards
the formation of acetone and propene.
mhissa@ju.edu.sa mohom63@yahoo.comEffect of milling on the structural, magnetic and catalytic
properties of zinc ferrite synthesized by microwave combustion
method
Mohamed Housam Mahmoud
Al Jouf University, Saudi Arabia
Nano Res Appl, Volume:4
DOI: 10.21767/2471-9838-C1-009