Green Synthesis and Characterization of Silver Nanoparticles / CM-Chitosan-Isopropanol by Gamma Irradiations Method

Abstract

The present study demonstrates a green process for the synthesis of spherical-shaped and stabilized silver nanoparticles Ag NPs using gamma irradiated conditions. This method has certain advantages over conventional methods since it can manage the particle size and structure and generates totally reduced and extremely pure nanoparticles free from by-products or chemical reducing agents. Silver nanoparticles composite (Ag NPs / CM) is prepared from an aqueous solution of silver nitrate, chitosan and isopropanol, at room temperature using gamma irradiation doses to induce reduction and cross-linking to formation in situ Ag NPs/ CM-chitosan-isopropanol solutions. The production and homogenous distribution of silver nanoparticles in the hydrogel matrix were characterized using transmission electron microscopy, XRD, Zeta potential and UV-Vis spectrophotometer analysis. The silver/ CM-chitosan-isopropanol matrixes possessed different gamma doses using a Co- 60 gamma source. Through the comprehensive results of IR- Ag NPs /(CM- chitosan isopropanol solutions due to antibacterial activity test, the results show the prepared Ag NPs /CM-chitosan-isopropanol could be used as an antibacterial agent. The obtained Ag nanoparticles were stable for over 3 months at room temperature. the analysis outcomes indicate that the colloidal Solution (silver nanoparticles / (CM chitosan - isopropanol)) has a promising ability to be used in antibacterial applications in the future.

The Role of Annealing Treatment on Crystallographic, Optical, and Electrical Features of Bi2O3 Thin Films Prepared Using Reactive Plasma Sputtering Technology

“…Tere are many studies on high annealing temperature infuence on Bi x O x flms [57,58]. According to the data, the annealing of the flms at 300 °C maximizes absorbance when there is extra annealing to 400 °C, absorbance decreases in the annealed flms at 500 °C because of of the flm's roughness, and the following formula has been used to evaluate the bandgap [44,[59][60][61][62][63][64]:…”

“…Te voltage for the SEM images was 10 kV, and the distances used were 5.6 mm and 10.6 mm, respectively. By applying (Bragg-Brentano) geometry and monochromatic Cu-Kα radiation in X-ray difraction (XRD) (Bruker D8 Advance) [36,37,[41][42][43][44][45][46][47], we examined the thin flm crystallographic structure. We calculated the flm absorption spectra with UV-Vis spectrophotometers (ocean Optics USB 4000) [48][49][50][51] and determined the optical band gap Eg.…”

NanoSilver/CS Solutions Optical Characterizations and Some Applications

“…Ag-NPs / (CM CSisopropanol) is from reducing AgNO3 into ions (Ag+) of positive silver helped by fragmenting large Ag-NPs in γ-irradiation [12]. The figure below shows the manufactured Ag-NPs.…”

“…There are many developed approaches such as chemical [7], electrochemical [8] and decreasing photochemical [9], ultrasound [10], microwave [11], and irradiations of both gamma [12] and electron to [13][14][15][16][17][18][19] synthesize Ag-NPs by various stabilizers [20][21][22][23]. Ag-NPs depending on sizes and forms utilized in biosensors materials, cosmetics, antimicrobial uses, conducting materials and electrical constituents.…”