Green synthesis of carbon dots from pork and application as nanosensors for uric acid detection

In this work, a green, simple, economical method was developed in the synthesis of fluorescent carbon dots using pork as carbon source. The as-prepared carbon dots exhibit exceptional advantages including high fluorescent quantum yield (17.3%) and satisfactory chemical stability. The fluorescence of carbon dots based nanosensor can be selectively and efficiently quenched by uric acid . This phenomenon was used to develop a fluorescent method for facile detection of uric acid within a linear range of 0.1–100   μM and 100–500   μM, with a detection limit of 0.05   μM (S/N   =   3). Finally, the proposed method was successfully applied in the determination of uric acid in human serum and urine samples with satisfactory recoveries, which suggested that the new nanosensors have great prospect toward the detection of uric acid in human fluids.