Effect of Cu Salt Molarity on the Nanostructure of CuO Prolate Spheroid

Abstract

Copper sulfate pentahydrate was used as a source of Cu ion with five different molarities (0.02, 0.05, 0.1, 0.15, 2 and 0.25[Formula: see text]M). XRD, FE-SEM and TEM techniques all showed that CuO samples have polycrystalline monoclinic structure. CuO prolate spheroid is assembled from nanoparticles as building units. It was demonstrated that the purity, morphology, size range of prolate spheroid and density of nano building units are significantly influenced by Cu precursor’s molarity. The pure phase of CuO prolate spheroid was produced via molarity of 0.2[Formula: see text]M with crystallite size of 15.1565[Formula: see text]nm while the particle size of building units ranges from 16[Formula: see text]nm to 21[Formula: see text]nm. The stability of CuO nanosuspension or nanofluid was evaluated by zeta potential analysis. The obtained properties of specific structure with large surface area of CuO prolate spheroid make it a promising candidate for wide range of potential applications as in nanofluids for cooling purposes.

A High Thermal Conductivity of MgO-H2O Nanofluid Prepared by Two-Step Technique

“…45-0946 of polycrystalline MgO. The crystallite size (D) was calculated based on the full width at half maximum (FWHM) of the intensive diffraction peak (i.e., the plane 200) by using the Debye-Scherrer's formula [75,76]:…”