Electrochemical H2O2 sensor based on graphene oxide-iron oxide nanoparticles composite

This study presents hydrogen peoxide determination using a new electrochemical sensor based on Fe
₃
O
₄
functionalized graphene oxide (Fe
₃
O
₄
-APTES-GO). Fe
₃
O
₄
-APTES-GO was synthesized by a two-step process. First, Fe
₃
O
₄
was modified by (3-aminopropyl) triethoxysilane to introduce amino groups on the surface of graphene oxide(GO). Second, APTES-Fe
₃
O
₄
was reacted with the carboxylic groups of GO by an activating agent N-(3-dimethylaminopropyl)-N'-ethylcarbodiimide hydrochloride to form a new material called as Fe
₃
O
₄
-APTES-GO. The electrocatalytic activity of Fe
₃
O
₄
-APTES-GO towards electrooxidation of H
₂
O
₂
was described by using cyclic voltammetry technique.