Chemical Research in Chinese Universities ›› 2022, Vol. 38 ›› Issue (2): 529-534.doi: 10.1007/s40242-021-1038-1

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Palladium Nanoparticles/Graphdiyne Oxide Nanocomposite with Excellent Peroxidase-like Activity and Its Application for Glutathione Detection

LAN Weifei1, HU Ruifeng2, HUANG Danrong1, DONG Xu1, SHEN Gangyi1, CHANG Shan3, DAI Dongsheng3   

  1. 1. School of Pharmacy, Minzu University of China, Beijing 100081, P. R. China;
    2. Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China;
    3. Institute of Bioinformatics and Medical Engineering, School of Electrical and Information Engineering, Jiangsu University of Technology, Changzhou 213001, P. R. China
  • Received:2021-01-29 Revised:2021-04-19 Online:2022-04-01 Published:2021-04-19
  • Contact: SHEN Gangyi, DAI Dongsheng E-mail:shengy@muc.edu.cn;dongshengdai@126.com
  • Supported by:
    This work was supported by the National Natural Science Foundation of China(No.81573834).

Abstract: In this study, palladium nanoparticles loaded graphdiyne oxide (Pd/GDYO) nanocomposite were fabricated by in-situ reduction of palladium chloride in the dispersion of GDYO, and characte-rized by Raman spectra, transmission electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. The synthesized Pd/GDYO was first found to have catalytic activities similar to those of the peroxidase enzyme, which can catalyze the oxidation of peroxidase substrate 3,3',5,5'-tetramethylbenzidine(TMB) in the presence of hydrogen peroxide(H2O2). Steady-state kinetic studies showed that the catalytic reaction of Pd/GDYO follows a ping-pong mechanism, and Pd/GDYO has a stronger activity to TMB with a Michaelis constant(Km) value of 5.32×10-4 mmol/L. Based on the shielding effect of glutathione(GSH) on the Pd/GDYO-H2O2-TMB reaction system, a colorimetric detection method for GSH was deve-loped with a wide linear range from 0.1 μmol/L to 40 μmol/L and a limit of detection of 0.1 μmol/L. The method was successfully applied for fast and accurate detection of GSH in injection powder drugs. It was expected that this peroxidase-like Pd/GDYO nano- composite would have wide applications in the fields of biomedicine and environmental chemistry.

Key words: Palladium nanoparticle/graphdiyne oxide nanocomposite, Peroxidase-like activity, Colorimetric detection, Glutathione

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