Journal of Chaohu University ›› 2022, Vol. 24 ›› Issue (3): 88-96.doi: 10.12152/j.issn.1672-2868.2022.03.013

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Preparation of Carbon Quantum Dots Based Fluorescent Molecularly Imprinted Probes and Its Specific Recognition for Sulfamerazine

YANG Ji-liang,YUE Xian-tian:School of Chemistry and Material Engineering, Chaohu University;CHEN Jie-xiao:Wenzhou Environmental Technology Co., Ltd   

  1. 1. School of Chemistry and Material Engineering, Chaohu University, Chaohu Anhui 238024; 2. Wenzhou Environmental Technology Co., Ltd, Wenzhou Zhejiang 325000
  • Received:2021-01-13 Online:2022-05-25 Published:2022-09-07

Abstract: Rapid detection of sulphonamide antibiotic contamination in the environment is important for water environment monitoring and management. To fabricate carbon quantum dots based fluorescent molecularly imprinted sensor(CQDs-MIP) with specific recognition ability for sulfamethazine, nitrogen-doped carbon quantum dots, 3-aminopropyltriethoxysilane, ethylene glycol dimethacrylate and sulfamethazine were used as the fluorescence source, functional monomer, cross-linker and template molecule respectively. The effects of functional monomer addition, solvent type and cross-linker type on the performance of CQDs-MIP were investigated by adsorption experiments. The experimental results showed that the adsorption process of CQDs-MIP on sulfamethazine was in accordance with the Langmuir adsorption isotherm model and the second-order kinetic equation, and showed high selectivity for sulfamethazine with the selectivity coefficients of 2.28 and 3.02 with respect to sulfadiazine and sulfadimethazine, respectively. The linear range of CQDs-MIP for sulfamethazine was 2~100 mg·L-1 with a linear correlation coefficient of R2 = 0.9972; CQDs-MIP has the ability to detect sulfamethazine rapidly and sensitively.

Key words: carbon quantum dots, sulfamerazine, molecular imprinting, fluorescent probe, specific identification

CLC Number: 

  • O433.4