A nanosised oxygen scavenger: Preparation and antioxidant application to roasted sunflower seeds and walnuts

► A novel oxygen scavenger (OS) using iron nanoparticle was produced. ► Iron nanoparticle was prepared by liquid phase reduction method. ► Nanosised OS has a higher O2 absorption capacity than conventional OS. ► Nanosised OS has the potential application in oxygen-sensitive foods.