Highly sensitive non-enzymatic glucose sensor based on CoCu@MC derived from CoCu/melamine cyanurate superstructures

Abstract

Non-enzymatic glucose detections have attracted more and more attentions with the development of electrochemical catalysts. Herein, Co2+ and Cu2+ are introduced into the hexagonal prism of melamine cyanurate, and nitrogen-doped carbon seaweed-like nanosheets ([email protected]) are synthesized through pyrolysis. [email protected] shows superior electrochemical catalytic activity for glucose oxidation with high sensitivity (1.489 μA μM−1 cm−2), low detection limit (0.34 μM) and wide linear range (1 μM–1.25 mM). Also, [email protected] demonstrates excellent application potential for glucose detection in artificial sweat with good conductivity, fast electron transfer, and high selectivity, which result from CoCu bimetal composites and seaweed-like carbon nanostructures. The glassy carbon electrode coated with [email protected] was used as the working electrode along with Ag/AgCl as the reference electrode and carbon rod as the counter electrode. The findings above will provide a general methodology to design and synthesize different carbon nanostructures through the addition of different transition metal cations.