Synthesis and Characterization of Nickel Oxide Nanoparticles by Green as well as Chemical Routes and Comparisons their Properties

Abstract

Nickel Oxide (NiO) Nanoparticles(NPs)  were obtained using chemical and Eco-Friendly methods, utilizing Caper leaves extract, NaOH, and nickel sulfate hexahydrous. First step Ni(OH)₂ NPs was obtained by adding NaOH solution dropwise to mixture the caper leaves extract and solution of Ni(SO₄)₂.6H₂O. Then, calcination was done at 600 ^oC and 6 h for the Ni(OH)₂ NPs to produce NiO NPs. Different techniques such as X-Ray, FTIR, FE-SEM, EDX and BET have used to evaluate the physical features of grown samples. However, the XRD pattern confirmed that all the samples are contains only NiO phase with average crystallite sizes 46.62 nm and 19.12 nm for both eco-friendly and co-precipitation methods, respectively. FESEM image of the NiO NPs revealed to be spherical shape. The elements content by green synthesis was shown in the EDX results as (Ni = 64.3 Wt%, O= 24.6 Wt%) and by chemical method as (Ni = 66.3, O= 29.3). According to BET analysis, the specific surface area of prepared NiO NPs using chemical precipitation method was greater than that produced using an eco-friendly method.