Cu-ZnO Nanostructures Synthesis and Characterization

Abstract

5wt% copper doped zinc oxide (Cu-ZnO) nanostructures were prepared via the hydrothermal technique at different temperatures of 70, 100, 130, 160 and 190oC. UV spectroscopy, FE-SEM microscopy, XRD crystallography, and EDS measurements were used for nanostructure characterization. UV spectroscopy indicated a red shift for the absorption peaks, and hence a blue shift for the energy gap values, as temperature increased from 70 to 190oC. FE-SEM microscopy showed an increase in the average lengths and diameters of the nanostructures following a similar increase in temperature. XRD crystallography indicated decent structural patterns for Cu-ZnO nanostructures with an increase in crystallite size upon temperature increase. Interestingly, three unprecedented extra indices appeared in the structural pattern at 190oC, which might indicate a configuration of hexagonal crystallite with three extra planes. EDS measurements indicated the sole presence of Cu, Zn and O.

Anti-Oxidant and Anti-Microbial Activities of [ZnO: CoO/ Eugenol] and [ZnO: Fe2O3/ Eugenol] Nanocomposites

“…The potential of nanocomposites, a high-performance material that displays unexpected property combinations and unique design options, is so outstanding that it is helpful in a wide range of applications [4], such as medical treatments, civil, health, fabrication, information, techniques, environments, and energy sources [5]. Synthesis of metal oxide nanocomposite (MONCs): the synthesis of uniform-size nanocomposite is critical because its properties include optical, magnetic, electrical, and biological properties depending on their size and dimensions, more than one method can be used to synthesize the metal oxides (nanoparticles and nanocomposite) [6], and this study utilized a hydrothermal preparation approach since it needs low temperature, cheap costs, and a short time while being ecologically clean and nontoxic, with key parameters that can be readily modified and controlled [7]. The hydrothermal method can be defined as any heterogeneous reaction with solvents or water minerals under high temperature and pressure conditions to dissolve relatively insoluble materials under normal conditions [8].…”

Structural and Optical Properties of ZnO Nanostructures Synthesized by Hydrothermal Method at Different Conditions

“…The iconicity of ZnO is located between ionic and covalent semiconductors; it is naturally found in three different forms, namely, zinc mix, wurtzite, and rock salt. Further, the hexagonal wurtzite ZnO phase is of higher thermodynamic stability as compared to the other aforementioned phases, wherein each cation (Zn 2+ ) is surrounded by four anions (O 2-) at the center of a tetrahedron [1][2][3][4]. In terms of nano-scale, ZnO plays an essential role in many applications due to its outstanding optical, electrical, and mechanical features [5,6]; these applications include fluorescent tube luminescence, laser-active medium, photocatalysts, piezoelectric systems, sensors, photodetectors, and solar cells [7,8].…”