Abstract:Copper doped ZnS nanoparticles (Zn1-xS:Cux x =0,0.025,0.05,0.075) have been fabricated at room temperature without any capping agent by using chemical co- precipitation method. The prepared samples were analyzed by X-ray diffraction (XRD), a Scanning Electron Microscope (SEM), Energy Dispersive X-ray spectroscopy (EDS), and UV-Vis spectrophotometer. XRD studies confirmed that crystalline size of prepared nanoparticles are found between (2.034 -1.986 nm) and crystal structure was cubic, EDS spectra confi… Show more
“…It is clear that the averaged D of Fe 2 O 3 , CuFe 2 O 4 , CuO, and MgO were unsystematically changed with increasing of glycine concentration. This is due to the contribution of ternary phase (CuO, MgO, and Fe 2 O 3 oxides) in aggregation process as a consequence of the ionic radii differences between Cu (0.073 nm), 47 Mg (0.059 nm), 48 and Fe (0.064 nm), 49 as well as the effect of electronegativity of metals Cu (1.90), Mg (1.31), and Fe (1.83) in production of metal oxide molecules. It is obvious that with increasing in glycine fuel-mediating synthesis have resulted in crystalline size decrease, the case that supposedly due to spacer abundance in the media, leading to large number of nuclei for crystal growth.…”
Multi-phase metal oxides nanocomposites (NCs) have attracted considerable attention due to their extraordinary properties and novel applications over monometallic ones. Hence, trimetallic oxides nanoparticles (NPs) are preferred because of their immensely improved optical, catalytic, and biological properties, but few materials have been reported. Besides, glycine is an excellent structure-directing agent for NPs production with tailored physicochemical properties. Thus, in this work, a novel tri-phase CuO–Fe2O3–MgO (1:1:1) NCs was prepared via a sol-gel method in the presence of glycine as a fuel. The obtained NCs were characterized by Fourier transmission infrared, X-ray diffraction (XRD), Scanning electron micrographs, and UV-Vis. The XRD analysis emphasized the formation of NCs with monoclinic CuO, cubic MgO, hexagonal Fe2O3, and tetragonal CuFe2O4 crystals. The average crystallite size (D) was in the order of 10th of nm as computed by Scherrer method, with ternary phase seemingly affect the straightforward influence of glycine fuel concentration on the final crystallite sizes. UV-Vis analysis indicates two optical energy bandgaps which increased as glycine concentration increase. The antibacterial test against Staphylococcus aureus and Escherichia coli bacteria revealed comparable activity to that of Azithromycin standard drug, which increased with glycine concentration increase. The glycine-based tailored structural, optical, and biological properties of such trimetallic NCs making them of considerable candidate for certain applications development, possibly electronics and antibiotics; a case that encourage further investigations.
“…It is clear that the averaged D of Fe 2 O 3 , CuFe 2 O 4 , CuO, and MgO were unsystematically changed with increasing of glycine concentration. This is due to the contribution of ternary phase (CuO, MgO, and Fe 2 O 3 oxides) in aggregation process as a consequence of the ionic radii differences between Cu (0.073 nm), 47 Mg (0.059 nm), 48 and Fe (0.064 nm), 49 as well as the effect of electronegativity of metals Cu (1.90), Mg (1.31), and Fe (1.83) in production of metal oxide molecules. It is obvious that with increasing in glycine fuel-mediating synthesis have resulted in crystalline size decrease, the case that supposedly due to spacer abundance in the media, leading to large number of nuclei for crystal growth.…”
Multi-phase metal oxides nanocomposites (NCs) have attracted considerable attention due to their extraordinary properties and novel applications over monometallic ones. Hence, trimetallic oxides nanoparticles (NPs) are preferred because of their immensely improved optical, catalytic, and biological properties, but few materials have been reported. Besides, glycine is an excellent structure-directing agent for NPs production with tailored physicochemical properties. Thus, in this work, a novel tri-phase CuO–Fe2O3–MgO (1:1:1) NCs was prepared via a sol-gel method in the presence of glycine as a fuel. The obtained NCs were characterized by Fourier transmission infrared, X-ray diffraction (XRD), Scanning electron micrographs, and UV-Vis. The XRD analysis emphasized the formation of NCs with monoclinic CuO, cubic MgO, hexagonal Fe2O3, and tetragonal CuFe2O4 crystals. The average crystallite size (D) was in the order of 10th of nm as computed by Scherrer method, with ternary phase seemingly affect the straightforward influence of glycine fuel concentration on the final crystallite sizes. UV-Vis analysis indicates two optical energy bandgaps which increased as glycine concentration increase. The antibacterial test against Staphylococcus aureus and Escherichia coli bacteria revealed comparable activity to that of Azithromycin standard drug, which increased with glycine concentration increase. The glycine-based tailored structural, optical, and biological properties of such trimetallic NCs making them of considerable candidate for certain applications development, possibly electronics and antibiotics; a case that encourage further investigations.
“…From this Figure, it can be seen that α decreases as the wavelength ( ) of the incident photon increases. The extinction coefficient (α) value can be calculated via the following equation 42 , 43 . Figure 5 Absorption coefficient versus wavelength of CuO, Fe 2 O 3 , MgO and Fe 2 O 3 –MgO–CuO (FMC) nanocomposites.…”
In this paper, tri-phase Fe2O3–MgO–CuO nanocomposites (NCs) and pure CuO, Fe2O3 and MgO nanoparticles (NPs) were prepared using sol–gel technique. The physical properties of the prepared products were examined using SEM, XRD, and UV–visible. The XRD data indicated the formation of pure CuO, Fe2O3 and MgO NPs, as well as nanocomposite formation with Fe2O3 (cubic), MgO (cubic), and CuO (monoclinic). The crystallite size of all the prepared samples was calculated via Scherrer's formula. The energy bandgap of CuO, Fe2O3 and MgO and Fe2O3–MgO–CuO NCs were computed from UV–visible spectroscopy as following 2.13, 2.29, 5.43 and 2.96 eV, respectively. The results showed that Fe2O3–MgO–CuO NCs is an alternative material for a wide range of applications as optoelectronics devices due to their outstanding properties.
“…Te average crystallite size (D) of the NPs is estimated by Debye Scherrer's relation D � 0.9λ/β cos θ [4]. Bragg's formula was applied to estimated d-spacing nλ � 2d sin θ [13], while the lattice parameter (a) was calculated using the equation…”
Section: Resultsmentioning
confidence: 99%
“…Due to their ability to demonstrate new properties when compared to bulk ZnS, NPs have garnered a lot of attention [3][4][5][6][7][8]. As a result of their excellent optoelectronic properties, low cost, nontoxicity, and natural abundance, ZnS NPs have been utilized for photocatalysts, solar cells, light diodes, and bio-applications [9][10][11][12][13][14], among others. Generally, chemical approaches for synthesizing nanomaterials are faster and cheaper, and they provide a higher yield than physical approaches.…”
In the current study, the researchers have explored the influence of doped Mg ions on the optical, morphological, and structural properties of zinc sulfide (ZnS) nanoparticles (NPs). The green technique was employed to prepare pure and 2% and 5% Mg-doped ZnS NPs using the Plectranthus barbatus leaf extract as a capping agent. XRD, SEM, FTIR, and UV-visible were used in the investigation process. The XRD results showed that all the synthesized materials have a cubic structure with space group F-43m. The Dav was nearly in the range of 2.02–2.20 nm. The SEM images illustrated that NPs were agglomerated. The UV-visible results showed that the optical bandgap increased as Mg2+ ions increased, which was in the range of 3.81–4.42 eV. The absorption shoulder of the prepared NPs is blue-shifted with increasing dopant concentration. The FTIR spectrum gives characteristic peaks for Zn-S bonds and asserts NPs’ formation. The antibacterial check against E. coli and S. aureus bacterial strains revealed that pure and Mg-doped ZnS NPs have higher activity for both bacterial strains. The results have shown that the prepared materials can be used for antibacterial activities and optoelectronic applications.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
