A novel dual-mode colorimetric and ratiometric fluorescence method for detecting isocarbophos based on S, N-CDs inhibiting FeO@Cu-BTC nanozyme activity.

Although many colorimetric methods have been developed for on-site pesticide detection, most exhibit low sensitivity and limited resistance to interference. To address these issues, this study developed a novel dual-mode colorimetric-ratiometric fluorescence method for isocarbophos (ICP) detection using sulfur and nitrogen co-doped carbon nanodots (S, N-CDs) to inhibit catalytic FeO@Cu-BTC nanozyme activity. The synthesized FeO@Cu-BTC nanozymes with higher peroxidase-like activity were inhibited by S, N-CDs.