فهرست مطالب haider abdulelah

Ag/PEG/PVA nanocomposites were synthesized using the electrochemical method, in which silver nanoparticles (AgNPs) were incorporated into PEG/PVAmatrices at different time intervals (0, 4, 7, 10, and 13 minutes). Analysis using transmission electron microscopy (TEM) and X-ray diffraction analysis (XRD) absorbance measurements confirmed the bonding of AgNPs to the PEG/PVAmatrix that shows the fact that longer growth times provide more opportunities for silver nanoparticles to aggregate. In addition, the analysis using X-ray diffraction showed that the AgNPs had a structure with face-centered cubic structure. In the last part of this study, synthesized nanocomposites showed strong antibacterial properties against E.coli and Staphylococcus aureus, with a large inhibition zone of 68 mm.

Porous CdS nanocrystalline thin film was synthesized via chemical bath deposition. The XRD (X-ray diffraction) pattern of the porous shows the cubic structure. FESEM (Field emission scanning electron microscopy) analysis shows that the surface of Cadmium sulfide (CdS) is a porous shape.  The EDX (energy dispersive X-ray spectroscopy) Technique assures the presence of Cd and S elements in the sample. To determine the band gap energy of porous CdS, UV-visible absorption spectra were analyzed, revealing an estimated value of approximately 2.39 eV. Subsequently, the photocatalytic degradation of methylene blue was using porous CdS as the catalyst. This degradation process took place under visible light irradiation from a 200-W xenon lamp. The utilization of porous CdS in this photocatalytic reaction demonstrates its potential as an effective catalyst for the degradation of methylene blue, a commonly used dye in various industries. To our knowledge, there is no previous study about porous CdS acting as catalysis to remove methylene blue dye. In seven hours, porous CdS removed 72% of methylene blue.

Many academic researchers have focused throughout the last decades on the decomposition of the organic contaminants in wastewaters aided by oxide semiconductor nanostructures, as well as the manufacture of these nanomaterials using simple, environmentally, rapid, and cost-effective procedures . ZnO nanowires (or nanorods) have received a great deal of attention due to their unusual material features and outstanding performance in electronics, optics, and photonics . ZnO nanoparticles (NPs) are prepared as a seed layer for growth nanorods (NRs) and used to remove synthetic dyes to reduce their environmental impact. Visible light (200W) was used as a source for degradation of 2-(2-pyridal azo) 1,8– dihy droxynapthalene dye with assisted ZnO NPs and NRs. In three hours, ZnO NRs removed 50.4% of Azo dye. Photolysis has been proven to be the most effective method for removing pigments. XRD and SEM were used to describe ZnO NPs and ZnO NRs .