Highly sensitive electrochemical detection of hazardous 2,4-dinitrophenylhydrazine using MgCo-TiO 2 /g-C 3 N 4 heterostructure nanocomposites

), and a lower limit of detection (0.06 µM) in a wide linear range (0.1-0.9 µM) under optimized conditions. Furthermore, the sensor exhibited high repeatability (RSD 1.38%), reproducibility (RSD 3.57%), stability and recovery in real sample analysis.