One-step hydrothermal preparation of biomass-derived carbon dots as fluorescent probes for the detection of enrofloxacin in aquatic products

Enrofloxacin (ENR) residue is harmful to humans and the ecosystem. Therefore, it is necessary to develop a method for the detection of ENR residues in food. Herein, we have prepared novel biomass-derived carbon dots (BCDs) by a one-step hydrothermal method to detect ENR. The precursor material is cicada slough, which is one of the traditional crude drugs. Transmission electron microscopy (TEM) and X-ray diffraction (XRD) results confirmed the formation of BCDs. The average particle size of the prepared BCDs is 19.6 +/- 0.2 nm, and the maximum excitation/emission wavelength is 355/436 nm. Under the optimal conditions, the detection linear of ENR ranged from 0.13 to 16.67 mu M, and the detection limit was 0.069 mu M. According to the experimental results, it can be applied in the detection of ENR in aquatic products with a good recovery rate (88.6%-104.7%), demonstrating its potential in detecting ENR in aquatic products.