| Abstract |
Cu1−xFexO (x= 0, 0.025, 0.05, 0.075, and 0.1)
nanosheets can be sucessfully prepared by hydrothermal
method at 160 °C for 3 h in a solution of 0.5M KOH. X–ray
diffraction results indicated a monoclinic phase of crystalline
CuO nanosheets. Crystallite sizes and lattice constants
were determined by Rietveld refinements of the X–ray
diffraction peaks. The crystallite sizes significantly
decreased from 28.46 to 21.71 nm with the increase of Fe
content. Scanning electron microscopy and transmission
electron microscopy revealed the plate-like shapes with the
estimated width and length in the range of 50–170 and
100–275 nm, respectively. The optical band gaps (Eg) studied
by ultraviolet-visible spectroscopy are found to
decrease from 3.625 eV for undoped sample to 3.430 eV in
Fe–doped CuO sample of x = 0.1. The magnetic properties
of samples studied by vibrating sample magnetometry
indicated a paramagnetic behavior for CuO nanosheets and
ferromagnetic behavior in Fe–doped CuO nanostructures
with the magnetization strongly depended on the Fe content.
The ferromagnetism of Fe-doped samples was
discussed base on the F-center exchange mechanism via
oxygen vacancy defects. |
Publication
Journal Publication
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