4.7 Article

Sustainable Synthesis of Cadmium Sulfide, with Applicability in Photocatalysis, Hydrogen Production, and as an Antibacterial Agent, Using Two Mechanochemical Protocols

期刊

NANOMATERIALS
卷 12, 期 8, 页码 -

出版社

MDPI
DOI: 10.3390/nano12081250

关键词

mechanosynthesis; combined milling; semiconductor; photocatalysis; hydrogen evolution; antibacterial activity; wastewater treatment

资金

  1. Science Committee of the Ministry of Education and Science of the Republic of Kazakhstan [AP09563428]
  2. MEYS CR [LM2018110]
  3. Slovak Research and Development Agency [APVV-18-0357]
  4. Ministry of Education, Science, Research and Sport of the Slovak Republic Grant Agency [2/0112/22]
  5. COST Action by the COST Association (European Cooperation in Science and Technology) [CA18112]
  6. German Research Foundation (DFG) as part of the Research Training Group on Urban Water Interfaces [GRK 2032]

向作者/读者索取更多资源

CdS nanoparticles were synthesized using cadmium acetate and sodium sulfide precursors. The addition of sodium thiosulfate as an additional sulfur precursor was investigated. The samples were characterized and tested for photocatalytic activity and antibacterial potential. The results showed that CdS prepared by combined milling had superior photocatalytic activity and inhibitory effect on bacterial growth.
CdS nanoparticles were successfully synthesized using cadmium acetate and sodium sulfide as Cd and S precursors, respectively. The effect of using sodium thiosulfate as an additional sulfur precursor was also investigated (combined milling). The samples were characterized by XRD, Raman spectroscopy, XPS, UV-Vis spectroscopy, PL spectroscopy, DLS, and TEM. Photocatalytic activities of both CdS samples were compared. The photocatalytic activity of CdS, which is produced by combined milling, was superior to that of CdS, and was obtained by an acetate route in the degradation of Orange II under visible light irradiation. Better results for CdS prepared using a combined approach were also evidenced in photocatalytic experiments on hydrogen generation. The antibacterial potential of mechanochemically prepared CdS nanocrystals was also tested on reference strains of E. coli and S. aureus. Susceptibility tests included a 24-h toxicity test, a disk diffusion assay, and respiration monitoring. Bacterial growth was not completely inhibited by the presence of neither nanomaterial in the growth environment. However, the experiments have confirmed that the nanoparticles have some capability to inhibit bacterial growth during the logarithmic growth phase, with a more substantial effect coming from CdS nanoparticles prepared in the absence of sodium thiosulfate. The present research demonstrated the solvent-free, facile, and sustainable character of mechanochemical synthesis to produce semiconductor nanocrystals with multidisciplinary application.

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