Mbarek, FatmaCherif, IchrafCherif, AmiraAlonso, Jose MariaMorales, IrenePresa Muñoz De Toro, Patricia Marcela De LaAmmar, Salah2023-07-242023-07-242023-04-2710.3390/ma16093426https://hdl.handle.net/20.500.14352/87325Copyright: © 2023 by the authors. This research was supported by the Ministry of Higher Education and Scientific Research (Tunisia) and funded by Ministerio de Economia y Competitividad (MINECO) grant number PID2021-123112OB-C21.The present study aims at the integration of the "oxalic conversion" route into "green chemistry" for the synthesis of copper oxide nanoparticles (CuO-NPs) with controllable structural, morphological, and magnetic properties. Two oxalate-containing precursors (H_2C_2º_4.2H_2O and (NH_4)_(2)C_2O_4.H_2O) and different volume ratios of a mixed water/glycerol solvent were tested. First, the copper oxalates were synthesized and then subjected to thermal decomposition in air at 400 degrees C to produce the CuO powders. The purity of the samples was confirmed by X-ray powder diffraction (XRPD), and the crystallite sizes were calculated using the Scherrer method. The transmission electron microscopy (TEM) images revealed oval-shaped CuO-NPs, and the scanning electron microscopy (SEM) showed that morphological features of copper oxalate precursors and their corresponding oxides were affected by the glycerol (V/V) ratio as well as the type of C_2º_4^2- starting material. The magnetic properties of CuO-NPs were determined by measuring the temperature-dependent magnetization and the hysteresis curves at 5 and 300 K. The obtained results indicate the simultaneous coexistence of dominant antiferromagnetic and weak ferromagnetic behavior.engAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/journal article1996-1944https://www.mdpi.com/1996-1944/16/9/3426http://dx.doi.org/10.3390/ma16093426open access538.9Thermal-DecompositionDielectric-PropertiesCuO NanoparticlesCrystal-StructureOxalateFerromagnetismAggregationGlycerolWaterFísica del estado sólido2210.29 Física del Estado Sólido