A Novel Rare Earth and Covalent Organic Framework Composite for Rapid and Highly Sensitive Electrochemical Analysis of Sulfadiazine in Fish Muscle

The misuse of sulfadiazine (SFZ) has led to great hazard the environment and human safety; therefore, a simple, rapid, sensitive method detect is urgently needed. Herein, we report simple fabrication for rare earth vanadate samarium (SmV)-doped covalent organic framework COFTDBA-TTL nanocomposites (SmV/COFTDBA-TTL), which were used construct electrochemical sensor. synergistic effect arising from combination SmV accelerates charge transfer kinetics, along with creation more surface-active sites that benefit effective detection. Compared other sensors, this sensor exhibits low detection limit (2.40 nM), wide linear range (7.32–12.0 μM), good reproducibility (RSD = 0.823%), stability 3.60%). It provides novel theoretical basis application COF-based sensors environmentally destructive pollutants.