Synthesis and bacterial inhibition of novel Ag2S–N–CQD composite material

Kunjie Wang, Lei Liang, Jialin Xu, Hongxia Li, Mei Du, Xiaoliang Zhao, Deyi Zhang, Huixia Feng, Haiyan Fan

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


The present work aims to combine carbon quantum dots (CQDs) with the good water solubility, biocompatibility, and low toxicity and nano-sized silver sulfide with excellent antibacterial effect in the synthesized composite. The composite was further treated with polyethyleneimine (PEI) and conjugated with graphene oxide (GO). The as-prepared composite Ag2S–CQDs–PEI–GO exhibits a core of Ag2S with the size of 20–50 nm and the shell of CQDs with the average particle size of 1.8 nm. The core shell structure is loaded on the template of PEI–GO. Strong antibacterial effect was observed on Ag2S–CQDs composite against four strands of bacteria Staphylococcus aureus (S. aureus), Escherichia coli (E. coli), Enterococcus faecalis (E. faecalis), and Pseudomonas aeruginosa (P. aeruginosa). We briefly discussed the bacteriostatic mechanism of the composite. The as-prepared composite has huge potential in the development of biomedicine.

Original languageEnglish
Pages (from-to)1517-1524
Number of pages8
JournalChemical Papers
Issue number5
Publication statusPublished - May 1 2020


  • AgS
  • Carbon quantum dots
  • Composite materials
  • Inhibition

ASJC Scopus subject areas

  • Biochemistry
  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering
  • Materials Chemistry

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