Journal of Materials Science: Materials in Electronics, Jul 1, 2021
In the present work graphene oxide GO prepared by chemical exifliation of graphite using Hummer's... more In the present work graphene oxide GO prepared by chemical exifliation of graphite using Hummer's method. A facile and green synthesis of ZnO-rGO nanocomposite was performed via Alovera plant extract. The characterization tools (XRD-FTIR-FESEM-TEM-AFM) proved the formation of single phase of ZnO-rGO nanocomposite. Since the environmental contamination caused by Cd(II) ion is a world issue as it has a harmful effect especially on the human health and environment. Subsequently, our goal in this work is to find an accurate method for detection and adsorption of toxic Cd(II). ZnO and ZnO-rGO nanocomposites are prepared for removing Cd(II) and on behalf of increasing its removal efficiency, GO is added. The results showed a great improvement in removal efficiency reached up to 90% at pH 6 after 90 min. the structure and surface of prepared samples studied through XRD, FTIR, FESEM and AFM.
Journal of Materials Science: Materials in Electronics, Jun 20, 2022
Polyvinylidene fluoride (PVDF) polymer is considered as an encouraging piezoelectric material who... more Polyvinylidene fluoride (PVDF) polymer is considered as an encouraging piezoelectric material whose optical properties need to be enhanced. Zinc ferrite is an excellent photoelectric material, in the present work it was doped separately by (cobalt and copper) ferrite. Co-ZnFe 2 O 4 and Cu-ZnFe 2 O 4 nanoparticles were synthesized using auto-combustion method and characterized using XRD, FTIR, FESEM and HRTEM. The crystallite size was (28.8, 35.8, 22 and 31) nm for the Co-ZnFe 2 O 4 and Cu-ZnFe 2 O 4 nanoparticles, while the estimated particle size from HRTEM were 55 nm for the Co-ZnFe 2 O 4 nanoparticles and 75 nm for the Cu-ZnFe 2 O 4. The obtained samples used as PVDF fillers, aiming to improve its optical properties. The optical properties as well as, the piezoelectric response of the prepared PVDF/(Co-ZnFe 2 O 4 and Cu-ZnFe 2 O 4) nanocomposites were investigated. The maximum value for refractive index was related to PVDF/Co-ZnFe2O4 nanocomposite. While, Cu-ZnFe 2 O 4 nanoparticles have limited improvement of the PVDF optical properties. Co-ZnFe 2 O 4 nanoparticles increases the PVDF optical conductivity r opt. four times its original value as well as the dielectric values was increased from 0.05 for neat PVDF to 2. The piezoelectric response of the PVDF polymer is clearly increased by the addition of both Co-ZnFe 2 O 4 and Cu-ZnFe 2 O 4 nanoparticles.
The effect of CoFe 2 O 4 , CuFe 2 O 4 and Cu/CoFe 2 O 4 nanoparticles on the Optical properties a... more The effect of CoFe 2 O 4 , CuFe 2 O 4 and Cu/CoFe 2 O 4 nanoparticles on the Optical properties and piezoelectric response of the PVDF polymer. The authors whose names are listed immediately below certify that: All authors have participated in (a) conception and design, or analysis and interpretation of the data; (b) drafting the article or revising it critically for important intellectual content; and (c) approval of the final version.
Nanocomposites comprising (V2O5)x. (Mn0.4Fe2.6O4)(2−x), where x = [0.2, 0.4, 0.6, 0.8, and 1], we... more Nanocomposites comprising (V2O5)x. (Mn0.4Fe2.6O4)(2−x), where x = [0.2, 0.4, 0.6, 0.8, and 1], were successfully synthesized by milling each single phase of V2O5 and Mn0.4Fe2.6O4 nanostructured samples. We studied the structure and morphology of the prepared samples through X-ray diffraction and scanning electron microscopy. UV–Vis. spectrum analysis was used to study the optical characteristics. As an attempt to improve the optical and nonlinear optical properties of the PVDF blend, the prepared nanocomposites were used as nanofillers for the poly (vinylidene fluoride) (PVDF) polymer. Optical and nonlinear optical properties of the PVDF polymer were tuned using (V2O5)x. (Mn0.4Fe2.6O4)(2−x), where x = [0.2, 0.4, 0.6, 0.8, and 1] nanocomposite. The obtained results showed a tunable spectrum, absorption, refractive index, and dielectric constant at wavelengths ranging from 200 to 800 nm. However, the results showed that the (V2O5)0.6. (Mn0.4Fe2.6O4)1.4, sample was the best for obtaini...
The import marvel in multiferroic substances is the existence of spontaneous polarization and mag... more The import marvel in multiferroic substances is the existence of spontaneous polarization and magnetization which enable these materials meet the needs of technological applications. Multiferroic of BiFeO3 and nickel-doped magnetite was synthesized separately by flash and co-precipitation methods, respectively. The two phases were confirmed by X-ray diffraction (XRD), scanning electron microscope (SEM) and Fourier transformed infrared (FTIR) analysis. The dielectric properties of BiFeO3/Ni0.1Fe2.9O4 nanocomposite were studied as a function of temperature as well as frequency. Based on the frequency dependent of ac conductivity results, it indicated that the conduction occurs through tunneling and small polaron hopping. The composite sample shows excellent results for heavy metal (Cr6+) removal from wastewater as the removal efficiency was reached to 75% at PH 6 after 40 min. The adsorption of Cr (VI) on the surface of nanocomposite was occurred through Langmuir isotherm and follows ...
Nanomaterials, especially ferrites, have various applications in mechanical, electrical, and opti... more Nanomaterials, especially ferrites, have various applications in mechanical, electrical, and optical fields. However, their abilities in environmental applications remain unexplored. In this work, the flash auto-combustion method has been used to prepare three different compositions of CuFe2O4, Zn-CuFe2O4, and Co-CuFe2O4 nanocomposite. The structure, spectroscopic, surface, and morphological properties of the prepared samples were characterized using XRD, FTIR, BET, and HRTEM, respectively. According to XRD analysis, the prepared ferrites consist of nanocrystalline particles with sizes of 24.5, 37.5, and 32.6 for CuFe2O4, Zn-CuFe2O4, and Co-CuFe2O4, respectively. Zn-CuFe2O4 and Co-CuFe2O4 had a single cubic phase, while a tetragonal phase was formed in CuFe2O4. The addition of cobalt and zinc to copper ferrite increased the crystallite size and the lattice parameters. The absorption band in FTIR spectra, which represents the stretching vibrations along the [MetalO] bond at the octah...
Journal of Materials Science: Materials in Electronics
In this study, LaFeO3 perovskite is synthesized by the flash method, and then a simple method is ... more In this study, LaFeO3 perovskite is synthesized by the flash method, and then a simple method is developed for growing SiO2 on its surface to construct a core/shell nanocomposite. The thickness of the SiO2 shell is controlled by varying the amount of tetra-ethyl orthosilicate (TEOS). Two LaFeO3@SiO2 samples with varying SiO2 thicknesses were synthesized. Herein, the lattice parameters, morphology, magnetic, and adsorption properties of the investigated core/shell nanocomposites are tuned by changing the content of SiO2. Results confirm that when the content of SiO2 increased, the prepared LaFeO3@SiO2 core/shell nanocomposite showed good adsorption performance, and the removal efficiency enhanced from 50 to 60% for LaFeO3 and LaFeO3@SiO2, respectively. It is thought that the enhancement of the adsorption performance is related to the high porosity and amorphous nature of SiO2.
Journal of Materials Science: Materials in Electronics
M–Co$${\mathrm{Fe}}_{2}{\mathrm{O}}_{4}$$ Fe 2 O 4 (where M=Cu and Zn) nanoferrites were successf... more M–Co$${\mathrm{Fe}}_{2}{\mathrm{O}}_{4}$$ Fe 2 O 4 (where M=Cu and Zn) nanoferrites were successfully prepared using the citrate auto-combustion technique. The main idea was drawn through a complete study of the structural, morphological, thermal, magnetic, and electrical properties. The obtain findings were explained in the light of incorporation both $${\mathrm{Cu}}^{2+}$$ Cu 2 + and $${\mathrm{Zn}}^{2+}$$ Zn 2 + ions in the Co$${\mathrm{Fe}}_{2}{\mathrm{O}}_{4}$$ Fe 2 O 4 crystal. All the investigated samples were found to belong to space group (Fd-3m) and space group number (227). The crystallite size of the Co$${\mathrm{Fe}}_{2}{\mathrm{O}}_{4}$$ Fe 2 O 4 , Cu–Co$${\mathrm{Fe}}_{2}{\mathrm{O}}_{4}$$ Fe 2 O 4 , and Zn–Co$${\mathrm{Fe}}_{2}{\mathrm{O}}_{4}$$ Fe 2 O 4 nanoparticles was found to be 8, 15, and 14, respectively. While, the lattice constants were 8.4 nm, 8.39 nm, and 8.42 nm, respectively. The doping exhibits enhancement of the elastic properties. Cu–Co$${\mathrm{Fe}}...
Journal of Inorganic and Organometallic Polymers and Materials
CS/PVP blend embedded by Sr-hexaferrite nanoparticles as a novel composite material to improve th... more CS/PVP blend embedded by Sr-hexaferrite nanoparticles as a novel composite material to improve the optical and magnetic properties of composite samples. This work aimed to study and compare the functional and physical properties of CS/PVP film after and before adding SrFe12O19 with different weight percentages to form nanocomposite film with chemical formula CS/PVP/x Wt% SrFe12O19; x = 1, 3, 5 and 7. SrFe12O19 was prepared successfully by using citrate auto-combustion methods, then added to CS/PVP blend with different weight percentages. XRD shows the formation of Sr-hexaferrite in a single phase with an average crystallite size 44 nm. The semi-crystalline nature of CS/PVP film decreases with the addition of Sr-hexaferrite. FTIR displays the interaction between CS/PVP and SrFe12O19 by changing the intensity and broadening the OH band. HRTEM images show that SrFe12O19 has a rod structure and has average particle size ranging from 50 to 100 nm. The coercivity value increased by increa...
In this work, the effects of CoxZn1-x Fe2O4 (x= 0, 0.5, 1) nanofillers on the PVDF polymer were s... more In this work, the effects of CoxZn1-x Fe2O4 (x= 0, 0.5, 1) nanofillers on the PVDF polymer were scientifically studied. The structure and magnetic and optical properties were studied. XRD confirms the synthesis of nanofiller in a single phase. FTIR confirms the formation of nanoferrites. HRTEM shows that the prepared nanoferrites have a cubic-like shape. Also, the size and agglomeration increase with Co-Zn Fe2O4 nanoferrites compared to the other singles one. The effect of adding nanoferrites into PVDF matrix was studied using XRD, FTIR, FESEM, VSM, and UV-Vis. XRD and FTIR approved the complexation between PVDF polymer and nanoferrites. Also, addition of nanoferrites into PVDF leads to decrease the semi-crystalline nature of PVDF. FESEM showed that embedding nanoferrites into PVDF polymers creates pores and PVDF/Co-Zn Fe2O4 increases the pore size on the PVDF surface. The magnetic properties of PVDF were enhanced by adding the nanofiller. For example, saturation magnetization was i...
Nanocomposites containing different contributions of vanadium oxide (V2O5) and magnetite (Fe3O4) ... more Nanocomposites containing different contributions of vanadium oxide (V2O5) and magnetite (Fe3O4) modified with manganese (Mn) ions were fabricated upon the formula of xMn0.4Fe2.6O4/(1-x)V2O5, whereas x = 0.0, 0.2, 0.4, 0.5, 0.6, 0.8, and 1.0. The obtained compositions were characterized upon their structure, morphology, besides their magnetic susceptibility. The TEM micrographs depicted that V2O5 was formed as rod shapes with diameters of 20–30 nm and length of 450 nm, while Mn–magnetite was configured in ellipsoidal shapes with dimensions 25–40 nm. Moreover, the Maximum height of the roughness(Rt) changed from 507.0 to 220.6 nm, while the skewness (Rsk) increased from 0.104 to 0.122 for (x = 0.2, and x = 1.0), respectively. Furthermore, Curie Weiss constant (θ) increased from 830 to 890 K and then decreased to 520 K, for x = 0.2, 0.5, and x = 1.0, respectively. The photo-activated antibacterial activity was examined and showed that the inhibition zone increased significantly by inc...
Graphene oxide (GO) nanostructures are systems with many fascinating novel properties that can be... more Graphene oxide (GO) nanostructures are systems with many fascinating novel properties that can be used to study new science and have significant promise for applications. In this study, graphene oxide was prepared using the modified Hummer’s method. In addition, potassium ferrite is a good candidate for biomedical application, as iron and potassium are biocompatible and non-toxic materials. Mg0.85K0.3Fe2O4/GO nanocomposites were prepared by the citrate auto-combustion method. The effect of adding GO to Mg0.85K0.3Fe2O4 on structure, morphology, electrical, and magnetic properties was discussed. Samples under investigation were characterized using XRD, infrared spectroscopy (IR), high-resolution transmission electron microscopy (HRTEM), and atomic force microscopy (AFM). The crystallite size of prepared samples was decreased from 28.098 to18.148 nm by increasing GO content. Scanning electron microscope (SEM) confirms the successful adhesion of Mg0.85K0.3Fe2O4 nanoparticles on graphene...
Journal of Materials Research and Technology, 2020
Carbonated hydroxyapatite (CHAP)-doped with different concentrations of gold (Au) was sputtered o... more Carbonated hydroxyapatite (CHAP)-doped with different concentrations of gold (Au) was sputtered on a scaffold of alumina via pulsed laser deposition technique. The structural, microstructural and morphological behaviors were investigated. FESEM indicated that Au-CHAP was formed as spherical shapes with diameters around 0.25-0.45 m, while alumina was formed in rectangular grains with dimensions around 0.9 × 1.3 × 2.25 m 3. The examination of mechanical properties indicated that micro-hardness has been enhanced with a variation of sputtering composition upon changing of Au concentration. It was enhanced form 31.0 GPa at zero contribution of Au to be 34.0 GPa at the highest one. Moreover, the cell viability and cells were grown on the scaffold surface were also examined against the HFB4 cell line. It was shown that scaffold compositions displayed high compatibility and reached 92.5 ± 4.7%. Furthermore, the cells were not only spread and grew on the scaffold's surface, but they also proliferated deeply through the porosity of the scaffold as a function of Au dopant. This implies that tailoring scaffold for biomedical engineering depends on superfine composition could be suggested for numerous applications.
Journal of Superconductivity and Novel Magnetism, 2020
The effect of Nd-doped BiFeO 3 perovskite (Bi 1−x Nd x FeO) with ratios (x = 0, 0.05, 0.1, and 0.... more The effect of Nd-doped BiFeO 3 perovskite (Bi 1−x Nd x FeO) with ratios (x = 0, 0.05, 0.1, and 0.15) was studied. All samples were prepared by flash combustion technique. X-ray diffraction (XRD) confirmed single-phase structure for all samples. The effect of Nd-doped BiFeO 3 appears in the decrease of unit cell parameters. Microstructure was studied by transmission electron microscope (TEM). Physical property measurements (optical, electric, and magnetic) were reported. Maximum conductivity and magnetization were obtained at Nd content x = 0.15. For example, the saturation magnetization increased from 0.141 to 0.353 emu/g. Doped samples with Nd 3+ show larger value of dielectric constant and dielectric loss than pure one. Nd doping enhanced clearly the properties of BFO and opens an era of applications.
The purpose of this work to find the effect of magnetic material on adsorption of heavy metal cat... more The purpose of this work to find the effect of magnetic material on adsorption of heavy metal cations (Cr 6+ , Cd 2+ and Cu 2+). Consequently, hexagonal cobalt ferrite (CoFe 2 O 4) was prepared simply by flash method followed by calcination. The prepared sample was characterized using X-ray diffraction and FTIR which revealed the structure of nanoferrite. Field emission scanning electron microscopy and EDX explore the hexagonal-shaped product. The obtained results from surface area analysis (BET) showed that cobalt ferrite has large surface area (71.564 m 2 /g). The magnetic properties were studied by VSM and Faraday's method from which the sample acts as ferromagnetic material with large value of saturation magnetization (66.380 emu/g). Electrical properties such as conductivity and activation energy were studied using LCR bridge; the data confirmed semiconductor behavior of sample. The sample under investigation exhibited very good adsorption efficiency for heavy metal cation (Cr 6+ , Cd 2+ and Cu 2+) from wastewater. The maximum adsorption appeared for Cd 6+ at pH 6 and contact time 8 h.
Ni-doped magnetite nanoparticles with the formula Ni0.1Fe2.9O4 have been synthesized successfully... more Ni-doped magnetite nanoparticles with the formula Ni0.1Fe2.9O4 have been synthesized successfully by co-precipitation method. The prepared sample was characterized using X-ray diffraction, FTIR, field emission scanning electron microscopy, EDX and surface area analysis (BET). The magnetic properties were studied by VSM and faraday’s method; the sample shows ferrimagnetic behavior. Conductivity as well as activation energy was measured and calculated using LCR bridge; the sample shows semiconductor behavior. The prepared sample has a very good efficiency for removing heavy metals (Cr6+, Cd2+, Pb2+ and Cu2+) from wastewater. The maximum adsorption was appeared for Cr6+ at pH 6 and contact time 7 h.
Journal of Materials Science: Materials in Electronics, Jul 1, 2021
In the present work graphene oxide GO prepared by chemical exifliation of graphite using Hummer's... more In the present work graphene oxide GO prepared by chemical exifliation of graphite using Hummer's method. A facile and green synthesis of ZnO-rGO nanocomposite was performed via Alovera plant extract. The characterization tools (XRD-FTIR-FESEM-TEM-AFM) proved the formation of single phase of ZnO-rGO nanocomposite. Since the environmental contamination caused by Cd(II) ion is a world issue as it has a harmful effect especially on the human health and environment. Subsequently, our goal in this work is to find an accurate method for detection and adsorption of toxic Cd(II). ZnO and ZnO-rGO nanocomposites are prepared for removing Cd(II) and on behalf of increasing its removal efficiency, GO is added. The results showed a great improvement in removal efficiency reached up to 90% at pH 6 after 90 min. the structure and surface of prepared samples studied through XRD, FTIR, FESEM and AFM.
Journal of Materials Science: Materials in Electronics, Jun 20, 2022
Polyvinylidene fluoride (PVDF) polymer is considered as an encouraging piezoelectric material who... more Polyvinylidene fluoride (PVDF) polymer is considered as an encouraging piezoelectric material whose optical properties need to be enhanced. Zinc ferrite is an excellent photoelectric material, in the present work it was doped separately by (cobalt and copper) ferrite. Co-ZnFe 2 O 4 and Cu-ZnFe 2 O 4 nanoparticles were synthesized using auto-combustion method and characterized using XRD, FTIR, FESEM and HRTEM. The crystallite size was (28.8, 35.8, 22 and 31) nm for the Co-ZnFe 2 O 4 and Cu-ZnFe 2 O 4 nanoparticles, while the estimated particle size from HRTEM were 55 nm for the Co-ZnFe 2 O 4 nanoparticles and 75 nm for the Cu-ZnFe 2 O 4. The obtained samples used as PVDF fillers, aiming to improve its optical properties. The optical properties as well as, the piezoelectric response of the prepared PVDF/(Co-ZnFe 2 O 4 and Cu-ZnFe 2 O 4) nanocomposites were investigated. The maximum value for refractive index was related to PVDF/Co-ZnFe2O4 nanocomposite. While, Cu-ZnFe 2 O 4 nanoparticles have limited improvement of the PVDF optical properties. Co-ZnFe 2 O 4 nanoparticles increases the PVDF optical conductivity r opt. four times its original value as well as the dielectric values was increased from 0.05 for neat PVDF to 2. The piezoelectric response of the PVDF polymer is clearly increased by the addition of both Co-ZnFe 2 O 4 and Cu-ZnFe 2 O 4 nanoparticles.
The effect of CoFe 2 O 4 , CuFe 2 O 4 and Cu/CoFe 2 O 4 nanoparticles on the Optical properties a... more The effect of CoFe 2 O 4 , CuFe 2 O 4 and Cu/CoFe 2 O 4 nanoparticles on the Optical properties and piezoelectric response of the PVDF polymer. The authors whose names are listed immediately below certify that: All authors have participated in (a) conception and design, or analysis and interpretation of the data; (b) drafting the article or revising it critically for important intellectual content; and (c) approval of the final version.
Nanocomposites comprising (V2O5)x. (Mn0.4Fe2.6O4)(2−x), where x = [0.2, 0.4, 0.6, 0.8, and 1], we... more Nanocomposites comprising (V2O5)x. (Mn0.4Fe2.6O4)(2−x), where x = [0.2, 0.4, 0.6, 0.8, and 1], were successfully synthesized by milling each single phase of V2O5 and Mn0.4Fe2.6O4 nanostructured samples. We studied the structure and morphology of the prepared samples through X-ray diffraction and scanning electron microscopy. UV–Vis. spectrum analysis was used to study the optical characteristics. As an attempt to improve the optical and nonlinear optical properties of the PVDF blend, the prepared nanocomposites were used as nanofillers for the poly (vinylidene fluoride) (PVDF) polymer. Optical and nonlinear optical properties of the PVDF polymer were tuned using (V2O5)x. (Mn0.4Fe2.6O4)(2−x), where x = [0.2, 0.4, 0.6, 0.8, and 1] nanocomposite. The obtained results showed a tunable spectrum, absorption, refractive index, and dielectric constant at wavelengths ranging from 200 to 800 nm. However, the results showed that the (V2O5)0.6. (Mn0.4Fe2.6O4)1.4, sample was the best for obtaini...
The import marvel in multiferroic substances is the existence of spontaneous polarization and mag... more The import marvel in multiferroic substances is the existence of spontaneous polarization and magnetization which enable these materials meet the needs of technological applications. Multiferroic of BiFeO3 and nickel-doped magnetite was synthesized separately by flash and co-precipitation methods, respectively. The two phases were confirmed by X-ray diffraction (XRD), scanning electron microscope (SEM) and Fourier transformed infrared (FTIR) analysis. The dielectric properties of BiFeO3/Ni0.1Fe2.9O4 nanocomposite were studied as a function of temperature as well as frequency. Based on the frequency dependent of ac conductivity results, it indicated that the conduction occurs through tunneling and small polaron hopping. The composite sample shows excellent results for heavy metal (Cr6+) removal from wastewater as the removal efficiency was reached to 75% at PH 6 after 40 min. The adsorption of Cr (VI) on the surface of nanocomposite was occurred through Langmuir isotherm and follows ...
Nanomaterials, especially ferrites, have various applications in mechanical, electrical, and opti... more Nanomaterials, especially ferrites, have various applications in mechanical, electrical, and optical fields. However, their abilities in environmental applications remain unexplored. In this work, the flash auto-combustion method has been used to prepare three different compositions of CuFe2O4, Zn-CuFe2O4, and Co-CuFe2O4 nanocomposite. The structure, spectroscopic, surface, and morphological properties of the prepared samples were characterized using XRD, FTIR, BET, and HRTEM, respectively. According to XRD analysis, the prepared ferrites consist of nanocrystalline particles with sizes of 24.5, 37.5, and 32.6 for CuFe2O4, Zn-CuFe2O4, and Co-CuFe2O4, respectively. Zn-CuFe2O4 and Co-CuFe2O4 had a single cubic phase, while a tetragonal phase was formed in CuFe2O4. The addition of cobalt and zinc to copper ferrite increased the crystallite size and the lattice parameters. The absorption band in FTIR spectra, which represents the stretching vibrations along the [MetalO] bond at the octah...
Journal of Materials Science: Materials in Electronics
In this study, LaFeO3 perovskite is synthesized by the flash method, and then a simple method is ... more In this study, LaFeO3 perovskite is synthesized by the flash method, and then a simple method is developed for growing SiO2 on its surface to construct a core/shell nanocomposite. The thickness of the SiO2 shell is controlled by varying the amount of tetra-ethyl orthosilicate (TEOS). Two LaFeO3@SiO2 samples with varying SiO2 thicknesses were synthesized. Herein, the lattice parameters, morphology, magnetic, and adsorption properties of the investigated core/shell nanocomposites are tuned by changing the content of SiO2. Results confirm that when the content of SiO2 increased, the prepared LaFeO3@SiO2 core/shell nanocomposite showed good adsorption performance, and the removal efficiency enhanced from 50 to 60% for LaFeO3 and LaFeO3@SiO2, respectively. It is thought that the enhancement of the adsorption performance is related to the high porosity and amorphous nature of SiO2.
Journal of Materials Science: Materials in Electronics
M–Co$${\mathrm{Fe}}_{2}{\mathrm{O}}_{4}$$ Fe 2 O 4 (where M=Cu and Zn) nanoferrites were successf... more M–Co$${\mathrm{Fe}}_{2}{\mathrm{O}}_{4}$$ Fe 2 O 4 (where M=Cu and Zn) nanoferrites were successfully prepared using the citrate auto-combustion technique. The main idea was drawn through a complete study of the structural, morphological, thermal, magnetic, and electrical properties. The obtain findings were explained in the light of incorporation both $${\mathrm{Cu}}^{2+}$$ Cu 2 + and $${\mathrm{Zn}}^{2+}$$ Zn 2 + ions in the Co$${\mathrm{Fe}}_{2}{\mathrm{O}}_{4}$$ Fe 2 O 4 crystal. All the investigated samples were found to belong to space group (Fd-3m) and space group number (227). The crystallite size of the Co$${\mathrm{Fe}}_{2}{\mathrm{O}}_{4}$$ Fe 2 O 4 , Cu–Co$${\mathrm{Fe}}_{2}{\mathrm{O}}_{4}$$ Fe 2 O 4 , and Zn–Co$${\mathrm{Fe}}_{2}{\mathrm{O}}_{4}$$ Fe 2 O 4 nanoparticles was found to be 8, 15, and 14, respectively. While, the lattice constants were 8.4 nm, 8.39 nm, and 8.42 nm, respectively. The doping exhibits enhancement of the elastic properties. Cu–Co$${\mathrm{Fe}}...
Journal of Inorganic and Organometallic Polymers and Materials
CS/PVP blend embedded by Sr-hexaferrite nanoparticles as a novel composite material to improve th... more CS/PVP blend embedded by Sr-hexaferrite nanoparticles as a novel composite material to improve the optical and magnetic properties of composite samples. This work aimed to study and compare the functional and physical properties of CS/PVP film after and before adding SrFe12O19 with different weight percentages to form nanocomposite film with chemical formula CS/PVP/x Wt% SrFe12O19; x = 1, 3, 5 and 7. SrFe12O19 was prepared successfully by using citrate auto-combustion methods, then added to CS/PVP blend with different weight percentages. XRD shows the formation of Sr-hexaferrite in a single phase with an average crystallite size 44 nm. The semi-crystalline nature of CS/PVP film decreases with the addition of Sr-hexaferrite. FTIR displays the interaction between CS/PVP and SrFe12O19 by changing the intensity and broadening the OH band. HRTEM images show that SrFe12O19 has a rod structure and has average particle size ranging from 50 to 100 nm. The coercivity value increased by increa...
In this work, the effects of CoxZn1-x Fe2O4 (x= 0, 0.5, 1) nanofillers on the PVDF polymer were s... more In this work, the effects of CoxZn1-x Fe2O4 (x= 0, 0.5, 1) nanofillers on the PVDF polymer were scientifically studied. The structure and magnetic and optical properties were studied. XRD confirms the synthesis of nanofiller in a single phase. FTIR confirms the formation of nanoferrites. HRTEM shows that the prepared nanoferrites have a cubic-like shape. Also, the size and agglomeration increase with Co-Zn Fe2O4 nanoferrites compared to the other singles one. The effect of adding nanoferrites into PVDF matrix was studied using XRD, FTIR, FESEM, VSM, and UV-Vis. XRD and FTIR approved the complexation between PVDF polymer and nanoferrites. Also, addition of nanoferrites into PVDF leads to decrease the semi-crystalline nature of PVDF. FESEM showed that embedding nanoferrites into PVDF polymers creates pores and PVDF/Co-Zn Fe2O4 increases the pore size on the PVDF surface. The magnetic properties of PVDF were enhanced by adding the nanofiller. For example, saturation magnetization was i...
Nanocomposites containing different contributions of vanadium oxide (V2O5) and magnetite (Fe3O4) ... more Nanocomposites containing different contributions of vanadium oxide (V2O5) and magnetite (Fe3O4) modified with manganese (Mn) ions were fabricated upon the formula of xMn0.4Fe2.6O4/(1-x)V2O5, whereas x = 0.0, 0.2, 0.4, 0.5, 0.6, 0.8, and 1.0. The obtained compositions were characterized upon their structure, morphology, besides their magnetic susceptibility. The TEM micrographs depicted that V2O5 was formed as rod shapes with diameters of 20–30 nm and length of 450 nm, while Mn–magnetite was configured in ellipsoidal shapes with dimensions 25–40 nm. Moreover, the Maximum height of the roughness(Rt) changed from 507.0 to 220.6 nm, while the skewness (Rsk) increased from 0.104 to 0.122 for (x = 0.2, and x = 1.0), respectively. Furthermore, Curie Weiss constant (θ) increased from 830 to 890 K and then decreased to 520 K, for x = 0.2, 0.5, and x = 1.0, respectively. The photo-activated antibacterial activity was examined and showed that the inhibition zone increased significantly by inc...
Graphene oxide (GO) nanostructures are systems with many fascinating novel properties that can be... more Graphene oxide (GO) nanostructures are systems with many fascinating novel properties that can be used to study new science and have significant promise for applications. In this study, graphene oxide was prepared using the modified Hummer’s method. In addition, potassium ferrite is a good candidate for biomedical application, as iron and potassium are biocompatible and non-toxic materials. Mg0.85K0.3Fe2O4/GO nanocomposites were prepared by the citrate auto-combustion method. The effect of adding GO to Mg0.85K0.3Fe2O4 on structure, morphology, electrical, and magnetic properties was discussed. Samples under investigation were characterized using XRD, infrared spectroscopy (IR), high-resolution transmission electron microscopy (HRTEM), and atomic force microscopy (AFM). The crystallite size of prepared samples was decreased from 28.098 to18.148 nm by increasing GO content. Scanning electron microscope (SEM) confirms the successful adhesion of Mg0.85K0.3Fe2O4 nanoparticles on graphene...
Journal of Materials Research and Technology, 2020
Carbonated hydroxyapatite (CHAP)-doped with different concentrations of gold (Au) was sputtered o... more Carbonated hydroxyapatite (CHAP)-doped with different concentrations of gold (Au) was sputtered on a scaffold of alumina via pulsed laser deposition technique. The structural, microstructural and morphological behaviors were investigated. FESEM indicated that Au-CHAP was formed as spherical shapes with diameters around 0.25-0.45 m, while alumina was formed in rectangular grains with dimensions around 0.9 × 1.3 × 2.25 m 3. The examination of mechanical properties indicated that micro-hardness has been enhanced with a variation of sputtering composition upon changing of Au concentration. It was enhanced form 31.0 GPa at zero contribution of Au to be 34.0 GPa at the highest one. Moreover, the cell viability and cells were grown on the scaffold surface were also examined against the HFB4 cell line. It was shown that scaffold compositions displayed high compatibility and reached 92.5 ± 4.7%. Furthermore, the cells were not only spread and grew on the scaffold's surface, but they also proliferated deeply through the porosity of the scaffold as a function of Au dopant. This implies that tailoring scaffold for biomedical engineering depends on superfine composition could be suggested for numerous applications.
Journal of Superconductivity and Novel Magnetism, 2020
The effect of Nd-doped BiFeO 3 perovskite (Bi 1−x Nd x FeO) with ratios (x = 0, 0.05, 0.1, and 0.... more The effect of Nd-doped BiFeO 3 perovskite (Bi 1−x Nd x FeO) with ratios (x = 0, 0.05, 0.1, and 0.15) was studied. All samples were prepared by flash combustion technique. X-ray diffraction (XRD) confirmed single-phase structure for all samples. The effect of Nd-doped BiFeO 3 appears in the decrease of unit cell parameters. Microstructure was studied by transmission electron microscope (TEM). Physical property measurements (optical, electric, and magnetic) were reported. Maximum conductivity and magnetization were obtained at Nd content x = 0.15. For example, the saturation magnetization increased from 0.141 to 0.353 emu/g. Doped samples with Nd 3+ show larger value of dielectric constant and dielectric loss than pure one. Nd doping enhanced clearly the properties of BFO and opens an era of applications.
The purpose of this work to find the effect of magnetic material on adsorption of heavy metal cat... more The purpose of this work to find the effect of magnetic material on adsorption of heavy metal cations (Cr 6+ , Cd 2+ and Cu 2+). Consequently, hexagonal cobalt ferrite (CoFe 2 O 4) was prepared simply by flash method followed by calcination. The prepared sample was characterized using X-ray diffraction and FTIR which revealed the structure of nanoferrite. Field emission scanning electron microscopy and EDX explore the hexagonal-shaped product. The obtained results from surface area analysis (BET) showed that cobalt ferrite has large surface area (71.564 m 2 /g). The magnetic properties were studied by VSM and Faraday's method from which the sample acts as ferromagnetic material with large value of saturation magnetization (66.380 emu/g). Electrical properties such as conductivity and activation energy were studied using LCR bridge; the data confirmed semiconductor behavior of sample. The sample under investigation exhibited very good adsorption efficiency for heavy metal cation (Cr 6+ , Cd 2+ and Cu 2+) from wastewater. The maximum adsorption appeared for Cd 6+ at pH 6 and contact time 8 h.
Ni-doped magnetite nanoparticles with the formula Ni0.1Fe2.9O4 have been synthesized successfully... more Ni-doped magnetite nanoparticles with the formula Ni0.1Fe2.9O4 have been synthesized successfully by co-precipitation method. The prepared sample was characterized using X-ray diffraction, FTIR, field emission scanning electron microscopy, EDX and surface area analysis (BET). The magnetic properties were studied by VSM and faraday’s method; the sample shows ferrimagnetic behavior. Conductivity as well as activation energy was measured and calculated using LCR bridge; the sample shows semiconductor behavior. The prepared sample has a very good efficiency for removing heavy metals (Cr6+, Cd2+, Pb2+ and Cu2+) from wastewater. The maximum adsorption was appeared for Cr6+ at pH 6 and contact time 7 h.
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Papers by Rania Ramdan