Journal•ISSN: 1687-2932
The Egyptian Journal of Chemistry
National Information and Documentation Centre (NIDOC)
About: The Egyptian Journal of Chemistry is an academic journal. The journal publishes majorly in the area(s): Adsorption & Langmuir adsorption model. Over the lifetime, 1488 publications have been published receiving 3460 citations.
Papers published on a yearly basis
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TL;DR: In this article, the effect of different reaction's temperature on the produced ZnO nanoparticles was studied and the results showed that X-ray Diffraction, FT-IR, and EDAX confirmed the presence of high purity.
Abstract: This study was conducted as an attempt to reach the best method to synthesis zinc oxide nanoparticles (ZnONPs) using chemical methods. ZnO nanoparticles was prepared using Sol-Gel method from zinc chloride (ZnCl2) and sodium hydroxide (NaOH) as chemical reactors and polyethylene glycol with low molecular weight as surfactant. The effect of the different reaction’s temperature on the produced ZnO nanoparticles was studied. Four samples of zinc oxide nanoparticleswere prepared on different reaction’s temperatures; 0 °C, 50 °C, 90 °C, and 0-RT °C (the reaction beginning at 0 °C and after that increase the temperature to reach the RT). The obtained products were examined usingdifferent techniques; X-ray Diffraction (XRD), High Resolution Scanning Electron Microscope (HRSEM), Fourier Transform Infrared (FT-IR), Ultraviolet–Visible Spectroscopy (UV-Vis), and Energy Dispersive X-ray Analysis (EDAX). The results showed that XRD, FT-IR, and EDAX confirmed the presence of ZnO nanoparticles with high purity. The UV-Vis. absorption spectrum showed an absorption band at 376 nm due to ZnO nanoparticles. HRSEM showed the superiority of ZnO nanoparticles that synthesized at 50 °C and the inferiority of that synthesized at 0-RT °C.
72 citations
TL;DR: In this article, the nano-particles were applied to enhance antibacterial properties of cotton fabric with 86% and 93% growth reduction of test pathogenic bacterial strains, the particle size of the so obtained AgNPs was poly dispersed mixture with diameter average of 54.33 (92.7%) with Zeta potential (mV) -23.7.
Abstract: Spectral analysis of biogenic silver nano-particles (AgNPs) produced by Fusarium keratoplasticum A1-3 showed absorption at 400 nm which is used as a monitor for the formation of silver nanoparticles. TEM analysis indicated the formation of spherical AgNPs in size range from 6 to 36 nm. The band at 1650.13 cm−1 in FTIR analysis refers to the binding vibrations of amide I band of protein with N–H stretching band. XRD pattern of Ag-NPs indicated silver Ag crystalline phase indexed; the particle size of the so obtained AgNPs was poly dispersed mixture with diameter average of 54.33 (92.7%) with Zeta potential (mV) -23.7. AgNPs were applied to enhance antibacterial properties of cotton fabric with 86% and 93% growth reduction of test pathogenic bacterial strains.
58 citations
TL;DR: In this article, the structural and optical properties of polyvinyl alcohol- silicon dioxide (PVA-SiO2) nanocomposites have been investigated for UV- shielding with low cost, low weight and excellent anti-UV properties.
Abstract: Films of (polyvinyl alcohol- silicon dioxide) nanocomposites were prepared for UV- shielding with low cost, low weight and excellent anti-UV properties. Studying the structural and optical properties of PVA/SiO2 nanocomposites have been investigated. The experimental results showed that the absorbance (A), absorption coefficient (), extinction coefficient (K), refractive index (n), real (e1) and imaginary (e2) parts of dielectric constants and optical conductivity (σop) of PVA are increased with increasing of the SiO2 concentrations. The transmittance (T) and energy band gap (Eg) decrease as a SiO2 concentrations increase. Also, te results showed that (PVA-SiO2) nanocomposites can be used for flexible solar cells, diodes and transistors applications.
55 citations
TL;DR: In this paper, the dielectric properties of PVA-NiO/SiC nanocomposites were investigated in frequency ranging (100-5×106) Hz at room temperature.
Abstract: PREPARATION of PVA/NiO/SiC nanocomposites and studying their dielectric properties for antibacterial applications have been investigated. The A.C electrical properties of nanocomposites were studied in frequency ranging (100-5×106) Hz at room temperature. The experimental results showed that the dielectric constant and dielectric loss of (PVA-NiO-SiC) nanocomposites were decreased with an increasing the frequency of applied electric field. The A.C electrical conductivity increases with increasing of frequency. The dielectric constant, dielectric loss and A.C electrical conductivity of (PVA-NiO) nanocomposites were increased with increasing of SiC nanoparticles concentrations. The antibacterial applications for (PVA-NiO-SiC) nanocomposites tested against gram-positive (S. aureus) and gram-negative (E. coli). The results showed that the inhibition zone was increased with increase the concentrations of SiC nanoparticles.
49 citations
TL;DR: This review aimed to provide an overview for the importance of biomaterials, produced or degraded naturally, classification and applications.
Abstract: During recent years significant advances have been made in using and development of biodegradable polymeric materials for life applications. Degradable polymeric biomaterials are preferred because these materials have specific physical, chemical, biological, biomechanical and degradation properties. Wide ranges of natural or synthetic biopolymers capable of undergoing degradation hydrolytically or enzymatically are being investigated for many applications. This review aimed to provide an overview for the importance of biomaterials, produced or degraded naturally, classification and applications.
46 citations