Journal
BULLETIN OF MATERIALS SCIENCE
Volume 39, Issue 3, Pages 719-724Publisher
INDIAN ACAD SCIENCES
DOI: 10.1007/s12034-016-1206-y
Keywords
TM-doped ZnO-NPs; sol-gel method; size-strain method; optical properties
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Funding
- Shahid Chamran University of Ahvaz
- IAU
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Undoped and transition metal (TM)-doped ZnO nanoparticles (Zn0.98X0.02O-NPs, X = Mn, Cr, Co and Fe) were synthesized from a metal nitrate precursor and gelatin by a sol-gel method. The compounds were synthesized at calcination temperatures of 550(a similar to)C for 6 h. The synthesized undoped/doped ZnO-NPs were characterized by X-ray diffraction analysis (XRD) and scanning electron microscopy (SEM). XRD results indicated that the sample products were crystalline with a hexagonal wurtzite phase. SEM images showed the ZnO-NPs nearly spherical shapes and a non-uniform shape for doped ZnO-NPs. The crystalline development in the ZnO-NPs was investigated by X-ray peak broadening. The size-strain plot (SSP) method was used to study the individual contributions of crystallite sizes and lattice strain of the undoped and doped ZnO-NPs. The obtained results showed that strain of the NPs plays an important role in peak broadening; moreover, the mean crystalline size of the undoped and doped ZnO-NPs estimated from the SEM and the SSP method was highly inter-correlated. Finally, optical properties of the samples were studied by a UV-Vis spectrometer.
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