Synthesis and Characterization of Silver/Clay/Chitosan Bionanocomposites by UV-Irradiation Method

Abstract

Problem statement: Silver/Montmorillonite/Chitosan Bionanocomposites (Ag/MMT/Cts BNCs) have been synthesized by UV-irradiation reduction method in the absence of any reducing agent or heat treatment which is used to antibacterial application and medical devices. Approach: MMT, Chitosan and AgNO 3 were used as a solid support, stabilizer and silver precursor, respectively. The properties of Ag/MMT/Cts BNCs were studied as a function of UV-irradiation times. The crystalline structure, d-spacing of interlayer of MMT, the size distributions and surface plasmon resonance of synthesized silver nanoparticles (Ag-NPs) were characterized using Powder X-Ray Diffraction (PXRD), Transmission Electron Microscopy (TEM) and UV-vis spectroscopy. The functional groups of prepared BNCs were also determined by Fourier Transform Infrared (FT-IR). Results: The results obtained from UV-vis spectroscopy of synthesized Ag-NPs showed that the intensity of the maximum wavelength of the plasmon peaks were increased with the increasing in the UV-irradiation times. Results from UV-visible spectroscopy and Transmission Electron Microscopy (TEM) microphotographs show that particles size of Ag-NPs decrease with the increase of UV-irradiation time. Conclusion: UV-irradiation disintegrated the Ag-NPs into smaller size until a relatively stable size and size distribution were achieved. Ag/MMT/Cts BNCs could be suitable to antimicrobial applications and medical devices.

Synthesis of silver nanoparticles in montmorillonite and their antibacterial behavior

“…Based on our previous work, therefore, Ag NPs in the interlayer space of MMT were synthesized according to two different methods, the chemical and physical reduction techniques, using β-D-Glucose, 33 NaBH 4 , 34,35 UV, [36][37][38] and γ-irradiation 39 methods as the reducing agents. In this study, the different-sized Ag NPs were synthesized in the lamellar space of the MMT in the aqueous solution, by changing the initial concentration of Ag + ions at room temperature.…”

Green Synthesis of Silver Nanoparticles and the Study of Optical Properties

“…A variety of methods exists to synthesize Ag-NPs, including the microemulsion technique, γ-ray, UV or microwave irradiation and spray pyrolysis [3][4][5][6]. Polymers have also been used as matrices in nanocomposites or as stabilizers to provide stability for the metal nanoparticles against oxidation, agglomeration and precipitation [7].…”

Synthesis and characterization of silver/talc nanocomposites using the wet chemical reduction method

“…[20][21][22] Notably, silver nanoparticles are widely used as antibacterial agents, 23,24 catalysts, photocatalysts, 25,26 photosensitive components, 27 and the surface enhancer for Raman spectroscopy. 28,29 Talc is a nonexpandable lamellar hydrated form of magnesium silicate, with the empiric formula of Mg 3 Si 4 O 10 (OH) 2 .…”