A novel silver/polysulfone nanocomposite membrane was prepared by a convenient ultraviolet irradiation technique, through in situ reduction of silver salt (AgNO₃) added to a solution of commercial UDEL polyethersulfone dissolved in N-methyl-2-pyrrolidinone (NMP). The UV-reduction of Ag⁺ to Ag⁰ nanoparticles was confirmed by means of UV-vis spectroscopy, from aggregation phenomena. The effects of dispersion of silver nanoparticles within polysulfone matrix were investigated by means of ATR-FTIR, dynamic mechanical thermal analysis and differential scanning calorimetry. Using X-ray diffraction, it was shown that annealing produced silver crystallites of 70-90 nm across, which are partially textured in “sheetlike” {110} planes.

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