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Biosynthesized CuO nano-platelets: Physical properties & enhanced thermal conductivity Nanofluidics

This contribution reports for the first time, room temperature biosynthesis of p-type CuO nanoparticles carried out using Callistemon viminalis’ flower extracts as a chelating agent in a process that is entirely green. Room temperature X-ray diffraction, attenuated IR total reflection spectroscopy, X-ray photoelectron and Raman spectroscopy investigations confirmed the forma- tion of single phase Tenorite bcc monoclinic CuO nanocrystals post annealing in air, at 500 C. Photoluminescence spectroscopy with UV emissions at 356 nm (3.47 eV) and broad visible emis- sions at 418 nm, 561 nm, and 664 nm, support the formation in air, at 200 C, of CuO nanoparticles with high surface-to-volume ratios and defects. As a direct application, the biosynthesized CuO nanoplatelet-containing powder dispersed in de-ionized water showed an enhancement of the ther- mal conductivity from 6% to 34% and a significant stability of the PVP stabilized CuO-water nano- fluid.

Auteur(s) : B.T. Sone, A. Diallo, X.G. Fuku, A. Gurib-Fakim, M. Maaza
Pages : 160-170
Année de publication : 2017
Revue : Arabian Journal of Chemistry
N° de volume : 13
Type : Article
Mise en ligne par : DIALLO Abdoulaye