Characterization of Copper Oxide Nanoparticles Fabricated by the Sol–Gel Method

Abstract

Copper oxide nanoparticles were successfully prepared by a sol-gel technique. An aqueous solution of copper nitrate Cu(NO 3 ) 2 and acetic acid was used as precursor. On addition of sodium hydroxide (NaOH) a precipitate of copper oxide was immediately formed. The copper oxide nanoparticles were characterized by use of x-ray diffractometry (XRD), thermogravimetric analysis (TGA), differential thermal analysis, differential scanning calorimetry, Fourier-transform infrared spectroscopy (FTIR), vibrating sample magnetometry, and scanning electron microscopy (SEM). The XRD pattern contained sharp peaks of copper oxide nanoparticles with mixed cuprite and tenorite phases. Use of the Debye-Scherer equation showed that the crystallite size of the copper oxide nanoparticles increased with increasing annealing temperature. FTIR spectra revealed vibration of the CuO band at 473 cm À1 ; a band at 624 cm À1 was attributed to Cu 2 O. Maximum coercivity and saturation magnetization of the nanoparticles were 276 Oe and 0.034 emu/g, respectively. SEM micrographs of the nanoparticles revealed the presence of spherical nanoparticles of the tenorite phase whereas the cuprite phase was in the form of a compact deposit.

Facile Method for the Synthesis of Copper Nanoparticles Supported on the Organoclay Material

“…Figure 4 shows the spectra of the organoclay/Cu hybrid mate- as observed previously by Hadj-Hamou et al [41]. Sharp peak at 3600 cm ; a band at 624 cm −1 was attributed to some other form of Cu nanoparticles as observed in the XRD spectra [42].…”

Preparation and characterization of ascorbic acid-mediated chitosan–copper oxide nanocomposite for anti-microbial, sporicidal and biofilm-inhibitory activity

“…Diffraction peaks at 2θ of 12° and 20° correspond to (020), (220), which showed that the chitosan had coated on copper oxide. The spectrum also shows the peaks in the range of 22.9°, 25.5°, 32.2°, 45.6°, 53.1°, 56.2°, 65.9°, 69.1°, and 77.4°, which correspond to the (021), (021), (110), (111), (020), (202), (− 113), (202) and (111) planes, respectively [18]. The XRD spectrum revealed that the prepared Chi-CuO nanocomposites had cubic crystalline structure, and the corresponding planes obtained were matched with the JCPDS File number (JCPDS NO: 05-0061) [18,19].…”

Special wettable nanostructured copper mesh achieved by a facile hot water treatment process

“…These approaches are vacuumbased deposition methods, which increase the cost and complexity of the process, and typically produce a mixture of copper oxide thin film and nanostructures. Methods such as electrochemical deposition [27,28] and sol-gel methods [29,30] can simplify the processing; yet they require hazardous or expensive solutions, respectively. Thermal oxidation methods [31,32] can provide a simple bottom-up approach of forming copper oxide nanostructures on a copper substrate.…”