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.
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Javed Ahmad (2009) studied this question.
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