ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Carbon quantum dots with green fluorescence as a probe for detecting uric acid

Guo-Wei Li, Yu-wei Lan, Yi-qin Peng, Wen-bin Bao, and Li-ya Zhou

School of Chemistry and Chemical Engineering, Guangxi University, Nanning, People’s Republic of China

E-mail: lanyuwei78@163.com

Received: 3 December 2021  Accepted: 5 January 2022

Abstract:

Green-fluorescent nitrogen-doped carbon quantum dots (g-CQDs) were synthesized via a simple and convenient one-step hydrothermal method using Passiflora edulis sims shell as a carbon source and m-phenylenediamine as a nitrogen source and applied to the detection of uric acid. Unlike most reported blue fluorescent probes, the obtained g-CQDs showed bright-green fluorescence under ultraviolet light with a high quantum yield of 37.6%. Moreover, the g-CQDs exhibit outstanding photostability and high sensitivity, an excellent linearity ranging from 1 to 17 µM, and a great limit of detection of 0.94 µM, which renders them suitable for the determination of uric acid in human urine with remarkable selectivity.

Keywords: Carbon quantum dots; Green fluorescence; Static quenching; Uric acid

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-022-02071-w

Chemical Papers 76 (6) 3627–3638 (2022)