کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8160139 1525103 2018 31 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Structural, morphological, optical, thermal and magnetic study of mackinawite FeS nanoparticles synthesized by wet chemical reduction technique
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Structural, morphological, optical, thermal and magnetic study of mackinawite FeS nanoparticles synthesized by wet chemical reduction technique
چکیده انگلیسی
Mackinawite FeS nanoparticles were synthesized by wet chemical reduction technique. The chemical composition of the nanoparticles determined by the energy dispersive analysis of X-ray (EDAX) showed them to be near stoichiometric and without any impurity. The X-ray diffraction (XRD) analysis showed the synthesized nanoparticles to be of single phase FeS and possess tetragonal unit cell structure with lattice parameters as a = 3.68 Å, c = 5.03 Å. The transmission electron microscopy showed the synthesized nanoparticles to be spherical in shape. The optical absorbance study revealed that the nanoparticles possess direct optical band gap of 2.39 eV. The thermogravimetric analysis exhibited two steps decomposition which was substantiated by the corresponding differential thermogravimetric peaks. The simultaneously recorded differential thermal analysis showed three regions of decomposition. The endothermic peak around 587 K is due to the solid state phase transformation of FeS structure to the orthorhombic MnP-type structure with space group Pnma. The kinetic parameters were evaluated by employing non-linear Kissinger-Akahira-Sunose method. The vibrating sample magnetometer study showed the nanoparticles samples to behave as super paramagnetic particles. All the obtained results are discussed in detail.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 546, 1 October 2018, Pages 59-66
نویسندگان
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