Hexagonal nanosheets of pyrrochlore-type lanthanum stannate for sensitive detection of chlorinated pesticide in food and environmental samples

2,4,6-Trichlorophenol (TCP) is the most widely used pesticide in the world and has a devastating effect on the environment and human health. As a result of the use of pyrochlore type La2Sn2O7 hexagonal nanosheet (La2Sn2O7 HNS) modified electrode, this work reports on the quick and sensitive electrochemical detection of TCP. The La2Sn2O7 HNS is reported here for the first time and has been made using a simple precipitation and calcination technique. The crystal structure and surface morphologies of La2Sn2O7 HNS have been characterized using XRD, XPS, HR-TEM, and FE-SEM analyses. Detection limits of 0.074 mu M and sensitivity of 1.5 mu A mu M-1 cm-2 were achieved using the La2Sn2O7 HNS for TCP detection. It also showed decent selectivity among the common interfering molecules. Additionally, the La2Sn2O7 HNS/GCE sensor was able to detect TCP in water and vegetable samples with >90 % recovery, proving its appropriateness for quick TCP detection.