2D g-C3N4 nanosheets bridged 1D MWCNTs form 3D g-C3N4/MWNTs nanocomposites as electrode material.
The 2D graphene-like g-C3N4 was rarely reported.
The overlapping voltammetric response of DA, UA and Trp is well-resolved.
The coexistence of AA has no obvious interference toward detection of DA, UA and Trp.