A Novel method in Biosynthesis Silver Nanocomposite

In this work,Polyacrylaimde grafted carboxymethyl starch (PAAm-g-CMS) with different nitrogen contents was prepared using ultra violet /photoinitiator (UV/PI) system where the water soluble 4-(trimethylammoniummethyl) benzophenone chloride was used as the photoinitiator. PAAm-g-CMS was further utilized to prepare PAAm-g- CMS silver nanoparticles (PAAm-g-CMS-AgNPs) composite. The latter was 12prepared using silver nitrate as a precursor and PAAm-g-CMS as both reducing and capping agent under alkaline conditions. The as prepared PAAm-g-CMS-AgNPs composite was characterized by FTIR and by measuring the absorbance of its colloidal solution using UV-vis spectrophotometer. The size and shape of the nanoparticles were measured by TEM. Reproducibility of the synthesis method was also tested. Highest absorbance of the colloidal solution of PAAm-g-CMS-AgNPs was obtained when PAAm-g-CMS (Nitrogen content (%) =7.7) concentration of 0.8% (w/v); AgNO3 concentration of 900 ppm; pH 12; temperature 80C for 3h were used. 20 TEM showed round shape nanoparticles with size varies from 1-11 nm.