Composition and Morphology Investigation of NiCoB Nanoparticles, as-Prepared and Coated by SiO2

Lončarek, Ivana and Tonejc, Anđelka and Skoko, Željko and Novosel, Nikolina and Mustapić, Mislav and Zadro, Krešo (2013) Composition and Morphology Investigation of NiCoB Nanoparticles, as-Prepared and Coated by SiO2. Croatica Chemica Acta, 86 (3). pp. 297-307. ISSN 0011-1643

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Abstract

NiCoB nanoparticles, as-prepared and coated by SiO2, were synthesized by chemical reduction of metallic salts. The as-prepared samples were additionally annealed at 650 for 1 hour in argon atmos-phere. All samples (the as-prepared and annealed ones) were investigated by X-ray powder diffraction (XRD), field emission scanning electron microscopy (FE-SEM) and energy dispersive spectroscopy (EDS). According to FE-SEM observations each of the investigated samples was composed of nearly spherical nanoparticles with average dimension smaller than 30 nm. Also, tendency of formation of irregular agglomerates was present in both cases of the as-prepared and annealed investigated samples. XRD measurements of as-prepared samples revealed fully amorphous structure. In case of annealed samples, crystallization of different phases was confirmed (as a consequence of heat treatment at 650 ∘C). The existence of these phases was also observed from FE-SEM micrographs as different morphologies present in the samples.

Item Type: Article
Keywords: amorphous NiCoB nanoparticles; X-ray diffraction; Rietveld refinement; scanning electron microscopy (SEM); energy dispersive X-ray analysis (EDS)
Date: 2013
Subjects: NATURAL SCIENCES > Physics
Divisions: Faculty of Science > Department of Physics
Project code: 119-0982886-1009, 119-1191458-1017, 119-1191458-1019
Publisher: Hrvatsko kemijsko društvo
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 23 Apr 2014 15:46
Last Modified: 23 Feb 2016 15:38
URI: http://digre.pmf.unizg.hr/id/eprint/925

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