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Synthesis and Characterization of Nanocrystalline NiO-GDC via sodium alginate- mediated ionic sol gel method

Pezeshkpour, S, Salamatinia, B and Amini Horri, Bahman (2017) Synthesis and Characterization of Nanocrystalline NiO-GDC via sodium alginate- mediated ionic sol gel method Ceramics International, 44 (3). pp. 3201-3210.

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In this study, nanocrystalline nickel oxide gadolinium-doped ceria (NiO-GDC) powder was synthesized using an ionic sol-gel method. The effects of calcination time and temperature on the particle size and the physiochemical properties of nanocrystalline NiO-GDC are presented in this paper. Using this method, gel beads were formed by contacting sodium alginate solution as the gelling template and metal (gadolinium/cerium/Ni) nitrates as the precursor. The obtained nanocrystallites were characterized using Field Emission Scanning Electron Microscopy, powder X-ray diffraction, energy dispersive X-ray spectroscopy, thermo gravimetric analysis, nitrogen adsorption/desorption analysis, and Fourier transform infrared spectroscopy. It was observed that the increasing calcination temperature had affected both the particle size and the surface area of the NiO-GDC, whereas the increasing calcination time had only impacted the size of the particles. The smallest mesoporous nanocrystalline NiO-GDC powder (12.1225 ± 0.005 m2/g surface area), composed of cubic GDC (5.18 nm crystallite size) and cubic NiO (7.99 nm crystallite size) were synthesized at a calcination temperature of 500 °C for 2 hours. This study hopes to inspire more researches on the ionic-gelation method for synthesizing other metal nanostructures as well as other reaction parameters.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Chemical and Process Engineering
Authors :
Pezeshkpour, S
Salamatinia, B
Amini Horri,
Date : 14 November 2017
DOI : 10.1016/j.ceramint.2017.11.091
Copyright Disclaimer : © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
Uncontrolled Keywords : : Sol-gel, Nanocrystals, Ion-exchange, NiO-GDC
Depositing User : Melanie Hughes
Date Deposited : 23 Jan 2018 09:52
Last Modified : 14 Nov 2018 02:08

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