Inorganic nanoparticles fabricated alginate based nanocomposites for the treatment of brilliant blue dye

Abstract

The present research work addresses the importance and preparation of polyurethane-sodium alginate (PU-NaAL) composite and silver nanoparticles fabricated PU-NaAL (Ag@PU-NaAL) nanocomposites. Polyurethane was fabricated with sodium alginate to enhance its mechanical properties as well as maintained biocompatibility of the polymer. These polymers based composites were used as micro-reactors for the loading of AgNPs. SPR band appeared at 410 nm in UV–visible (UV-visible) spectra confirmed the successful fabrication of NPs. Fourier transform infrared spectroscopy (FTIR) illustrated the involvement of carbonyl group in the stabilization of mNPs. Thermo-gravimetric analysis (TGA) gives the interpretation of thermal behavior of nanocomposite polymer. It explained that AgNPs were remained stabilized even at high temperature (600 °C) at which major part of polymer campsite was degraded. This analysis also showed that 9.378% AgNPs contents were loaded in polymer chains to prepare nanocomposite. Catalytic activity of Ag@PU-NaAL nanocomposite polymers was investigated by reducing brilliant blue (BB) dye while using NaBH4 as reductant. Dye was degraded catalytically in just 17 min while using NaBH4 as reducing agent. It was also concluded that rate of reduction of BB was also changed by changing the amount of BB dye, NaBH4 concentration and catalyst dose in the reaction mixture. Reported catalyst was also found efficient for the treatment of mixture of toxic dyes and dyes polluted textile industry wastewater.