Synthesis and X-ray structural characterization of NiO nanoparticles obtained through gelatin

Synthesis and X-ray structural characterization of NiO nanoparticles obtained through gelatin

Nanoparticles of fcc-NiO phase were obtained by heating the dried resin resultant of a mixture of gelatin and NiCl2·6H2O in aqueous solution. The average particle size and microstrain were calculated from the line broadening of X-ray powder diffraction peaks, and these values were between 15nm and 7...

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Bibliographic Details
Published in:Journal of non-crystalline solids Vol. 352; no. 32-35; pp. 3729 - 3733
Main Authors: Maia, A.O.G., Meneses, C.T., Menezes, A.S., Flores, W.H., Melo, D.M.A., Sasaki, J.M.
Format: Journal Article Conference Proceeding
Language:English
Published: Amsterdam Elsevier B.V 15-09-2006
Elsevier
Subjects:
Catalysis
Cross-disciplinary physics: materials science; rheology
Defects
Electrochromics
Exact sciences and technology
Materials science
Nanocrystalline materials
Nanocrystals
Nanoparticles
Nanoscale materials and structures: fabrication and characterization
Physics
Powders
Sintering
X-ray diffraction
Nanoparticles
Powders
Nanocrystals
Electrochromics
81.20.Fw
61.72.−y
Sintering
X-ray diffraction
Catalysis
61.46.Df
Defects
Nickel oxides
Particle size
FCC lattices
XRD
Heat treatments
61.46.Df; 81.20.Fw; 61.72.-y
Line broadening
Aqueous solutions
Reaction mechanism
Chemical synthesis
Nanocrystal
Catalysis; Nanocrystals; Electrochromics; X-ray diffraction; Defects; Powders; Nanoparticles; Sintering
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Description
Summary:Nanoparticles of fcc-NiO phase were obtained by heating the dried resin resultant of a mixture of gelatin and NiCl2·6H2O in aqueous solution. The average particle size and microstrain were calculated from the line broadening of X-ray powder diffraction peaks, and these values were between 15nm and 78nm, and 0.056% and 0.172%, respectively. The Rietveld refinement method was applied to all diffraction patterns. The particle size, obtained from this procedure, changes as a function of temperature, heating time and the remarkable reduction due to the addition of NaOH to the solution, which can be attributed to the presence of NaCl crystals and carbon encapsulating NiO nanoparticles during the heating. The heating temperature was in the range of 350–700°C. Thermo-gravimetric analysis showed that the majority of organic fraction starts to disappear after 300°C.
ISSN:0022-3093
1873-4812
DOI:10.1016/j.jnoncrysol.2006.03.103