Sabri, N.S. and Talari, M.K. and Yahya, A.K. (2010) Structural and Optical Properties: Mn Doped Nano ZnO Synthesized by Mechanochemical Synthesis. AIP Conference Proceedings . ISSN 0094-243X
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Manganese doped ZnO nanoparticles were synthesized by mechanochemical processing in a high energy ball mill (Zn1-xMnxO, x = 0, 0.02, 0.04, 0.06, 0.08, 0.1). ZnO nano particles were synthesized by milling corresponding chemical precursors in a planetary ball mill for different periods of time. Diluents were used to control the agglomeration and reaction kinetics during the milling. Diluents were removed from the milled powders by selective leaching technique and the samples were dried at 100 degrees C for 24 hours. Phase identification and crystallite size investigations were carried out from the data obtained by X-ray Diffraction (XRD) analysis of the samples. The peak shifting in XRD patterns showed that Mn ions were successfully doped into the ZnO crystal lattice with successive increase in dopant levels. Average crystallite size of the nano particles is seen to vary from 16 to 30 nm. Morphology of the samples was investigated by field emission scanning electron microscope (FESEM). It can be seen from FESEM images that the nano particles did not tend to agglomerate. Uv-Visible spectroscopic (Uv-Vis) technique was used for the optical properties characterization of the samples. Band gap values of the ZnO nano particles were determined from Tauc plots of UV-Vis data. The energy gap is seen to decrease with increase in Mn.
|Uncontrolled Keywords:||mechanochemical synthesis; manganese-dopednanoparticles; high-energy ball milling; reaction kinetics; agglomeration; powders; selective leaching technique; crystallite size; phase identification; X-ray diffraction; XRD; peak shifting; crystal lattice; field emission scanning electron microscopy; FESEM; ultraviolet-visible spectroscopy; band gap; energy gap; temperature 100 degC; time 24 h; ZnO:Mn|
|Subjects:||Material Science > Nanochemistry|
Material Science > Nanostructured materials
|Deposited On:||25 Sep 2010 11:13|
|Last Modified:||25 Sep 2010 11:13|
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