Green synthesis of the Ag/Fe۳O۴ nanocomposites and their catalyticapplication for the degradation of organic pollutants

The present study is the first report representing the biosynthesis and characterization ofAg/Fe۳O۴ nanocomposites using Eryngium caucasicum extract and evaluation thenanocomposites for decolorization of nitro-amines and azo dyes, known as importantbiological pollutants. The Ag/Fe۳O۴ nanocomposites also demonstrated a high catalyticactivity and ۱۰۰%, ۹۳.۶%, ۹۲.۷% and ۸۲.۵% of the CR, RhB, MB and MO dyes weredegraded in ۲۰۰s, ۸۰s, ۵۲۰s, and ۸۰s, respectively. Nanocomposite catalyst can berecovered from the reaction mixture and reused for three-cycle without remarkable loss ofcatalytic activity. Kinetics parameter of the reaction showed that the catalytic degradationof CR, RhB, MB and MO dyes followed the pseudo- first-order reaction. Results obtainedthrough catalytic evaluation suggested that the Ag/Fe۳O۴ nanocomposite could behelpful for eliminate the nitro-amines and azo dyes in a very effective manner

کلیدواژه ها:

Ag/Fe۳O۴ nanocomposites ، Eryngium caucasicum ، Azo dyes ، Pseudo- first-order reaction