Fluorescent Nanocomposite Based on Carbon Quantum Dots for the Quantification of Permanganate Ions in Aquatic...

This study highlights the development of a sensor based on a PVA/CQDs nanocomposite, which exhibited excellent sensitivity toward the permanganate ion (MnO₄ ^-), making it possible to apply it in aquatic matrices intended for aquaculture activities, ensuring the monitoring of the analyte. For the development of the sensing platform, fluorescent nanoparticles named carbon quantum dots (CQDs) were synthesized and their optical properties were investigated. Real sample assays were performed and the nanoparticles proved to be selective toward the MnO₄ ^-, making it possible to obtain high recovery results. Furthermore, the development of the detection platform becomes an excellent alternative for rapid, simple, and low-cost monitoring for the proper control of MnO₄ ^- use.