Solid-state Ru(bpy) 3 2+ electrochemiluminescence sensor for trace detection of fenpropathrin using loofah sponge-like carbon nanofibers and CdS

• Published in: Mikrochimica acta (1966) 2024-09, Vol.191 (10), p.570
• Main Authors: Lu, Juan, Li, Chao, Guo, Yanjia, Feng, Yongjia, Song, Yujia, Li, Ruidan, Tian, Li, Wang, Jing
• Format: Article
• Language: English
• Subjects: Animals; Cadmium Compounds - chemistry; Carbon - chemistry; Electrochemical Techniques - instrumentation; Electrochemical Techniques - methods; Food Contamination - analysis; Limit of Detection; Luminescent Measurements - methods; Nanofibers - chemistry; Organometallic Compounds; Pyrethrins - analysis
• ISSN: 1436-5073
• DOI: 10.1007/s00604-024-06647-z

Loofah sponge-like carbon nanofibers (LF-Co,N/CNFs) were utilized as a carrier for Ru(bpy) , and then combined with CdS to create a novel solid-state electrochemiluminescence sensor capable of detecting trace amounts of fenpropathrin. LF-Co,N/CNFs, obtained through the high-temperature pyrolysis of ZIF-67 coaxial electrospinning fibers, were characterized by a loofah-like morphology and exhibited a significant specific surface area and porosity. Apart from serving as a carrier, LF-Co,N/CNFs also functioned as a luminescence accelerator, enhancing the system's luminescence efficiency by facilitating electron transmission and reducing the transmission distance. The inclusion of CdS in the luminescence reaction, in conjunction with Ru(bpy) , further boosted the sensor's luminescence signal. The resulting sensor demonstrated a satisfactory signal, with fenpropathrin causing significant quenching of the ECL signal. Under optimized conditions, a linear relationship between the signal quench value and fenpropathrin concentration in the range 1 × 10 to 1 × 10  M was observed, with a detection limit of 3.3 × 10  M (S/N = 3). This developed sensor is characterized by its simplicity, sensitivity, and successful application in detecting fenpropathrin in real samples. The study not only presents a straightforward detection platform for fenpropathrin but also introduces new avenues for the rapid determination of various food contaminants, thereby expanding the utility of carbon fibers in electrochemiluminescence sensors.