In-situ synthesis of graphitic carbon nitride/iron oxide-copper composites and their application in the electrochemical detection of glucose

Abstract A simple method was proposed for the synthesis of graphitic carbon nitride(g-C 3 N 4 )/ iron oxide-copper nanostructures through a one-step pyrolysis of Cu 3 [Fe(CN) 6 ] 2 and melamine. The iron oxideand copper nanostructures, derived from Cu 3 [Fe(CN) 6 ] 2 , were decorated onto g-C 3 N 4 nanosheets, which can effectively protect the resultant graphitic carbon nitride nanosheetsfrom restacking. The derived Fe 2 O 3 and Cu nanostructures greatly enhance the electro-catalytic property of as-prepared composites. Three components including g-C 3 N 4 nanosheets, Fe 2 O 3 and Cu cooperatively enhance the electrochemical performance of non-enzymatic glucose detection. Modified electrodes based on g-C 3 N 4 /Fe 2 O 3 -Cu composites could detect glucose in the range of 0.6 μM─2.0 mM with a detection limit of 0.3 μM. The as-fabricated modified electrodes also demonstrated good stability and anti-interference performance.