Enhanced photo-electrochemical response of reduced graphene oxide and C 3 N 4 nanosheets for rutin detection.

Herein, a sensitive photo-electrochemical sensor based on C3 N4 and reduced graphene oxide nanosheets modified glassy carbon electrode (C3 N4 -RGO/GCE) has been fabricated for the detection of rutin under UV light illumination. In C3 N4 -RGO catalyst, RGO not only works as a template but also promotes electron transfer, meanwhile, C3 N4 acts as a photocatalyst. Benefiting from the superior electron transfer capacity and efficient UV light effect of the C3 N4 -RGO catalyst, we get a photo-electrochemical sensor for the rutin detecting with a low detection limit of 1.78×10-9 molL-1 and an excellent linear range of 5×10-9 -1.4×10-4 molL-1 . Meanwhile, the achieved C3 N4 -RGO/GCE demonstrated nice selectivity, good reproducibility as well as reliable stability. Moreover, compared with the electrochemical determination, the C3 N4 -RGO electrode provides a new way for rutin detection by photo-electrochemical method with a promising UV light responsive result.