ZIF-67 based CoS self-assembled on graphitic carbon nitride microtubular for sensitive electrochemical detection of paraquat in fruits.

Paraquat (PQ) is a widely used and harmful herbicide that must be detected in the environment. This study reports a novel composite (CoS-GCN) prepared by assembling cobalt disulfide (CoS) derived from metal-organic frameworks (MOFs) on graphitic carbon nitride (GCN). An electrochemical sensor (CoS-GCN/ glassy carbon electrode (GCE)) was successfully prepared by modifying CoS-GCN onto a GCE to sensitively detect PQ.