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Today, the synthesis of safe photoelectronic nanomaterials for inactivation of pathogens is essential due to the coronavirus pandemic. Besides, a significant part of nanomedicine research is directed at nanocomposite materials based on titanium dioxide, which have specific physicochemical and biological properties. In particular, attention is focused on nanocomposites with nanoparticles of noble metals, which are successfully used as antibacterial and antiviral agents in the field of health care. The synthesis of active metal/oxide nanocomposites by a facile method is relevant for successfully fighting with viral infections. The CeO2 & Ag, TiO2 & CeO2, and TiO2 & Au nanocomposites were formed with the morphology, ceria-silver and titanium-silver (aurum) interaction, which connected with the size effects of both Ag (Au) and CeO2 (TiO2) nanoparticles, redox properties caused by oxygen vacancies in the oxide structure. The CSR parameter of pure CeO2 is 7 nm, for CeO2 & Ag composite at 2 and 4 wt.% of silver is 6.5 and 6.9 nm, for TiO2 & CeO2 10.6 and 8.5 nm, for TiO2 & Au 15.9 nm, respectively. The structural properties of nanocomposites were studied by XRD, SEM, and EDS methods in dependence of Ag, Au, and ceria concentrations with values PZC (point zero of charge) of 4.3 ÷ 9.3. The NPs irradiated with UV for 30 min, effectively inhibited the influenza A virus, and the difference in infectious titers compared to the virus control (8.92 log10TCID50/mL) ranged from 2.31 to 6.95 log10TCID50/mL. UV irradiation of nanocomposites for 30 min did not change their antiviral properties against HAdV2 and HSV-1/US.

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Nanostructured Design of Cerium and Titanium Dioxide/Noble Metal Nanocomposites for Photoinactivation of RNA and DNA Viruses

  • 会议论文

  • 发表日期：

    2026年

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  • M. M. Zahornyi,
  • Olena M. Lavrynenko,
  • O. Y. Povnitsa,
  • L. O. Artiukh,
  • P. Y. Zaremba,
  • S. D. Zahorodnia,
  • A. I. Ievtushenko

摘要

Today, the synthesis of safe photoelectronic nanomaterials for inactivation of pathogens is essential due to the coronavirus pandemic. Besides, a significant part of nanomedicine research is directed at nanocomposite materials based on titanium dioxide, which have specific physicochemical and biological properties. In particular, attention is focused on nanocomposites with nanoparticles of noble metals, which are successfully used as antibacterial and antiviral agents in the field of health care. The synthesis of active metal/oxide nanocomposites by a facile method is relevant for successfully fighting with viral infections. The CeO2 & Ag, TiO2 & CeO2, and TiO2 & Au nanocomposites were formed with the morphology, ceria-silver and titanium-silver (aurum) interaction, which connected with the size effects of both Ag (Au) and CeO2 (TiO2) nanoparticles, redox properties caused by oxygen vacancies in the oxide structure. The CSR parameter of pure CeO2 is 7 nm, for CeO2 & Ag composite at 2 and 4 wt.% of silver is 6.5 and 6.9 nm, for TiO2 & CeO2 10.6 and 8.5 nm, for TiO2 & Au 15.9 nm, respectively. The structural properties of nanocomposites were studied by XRD, SEM, and EDS methods in dependence of Ag, Au, and ceria concentrations with values PZC (point zero of charge) of 4.3 ÷ 9.3. The NPs irradiated with UV for 30 min, effectively inhibited the influenza A virus, and the difference in infectious titers compared to the virus control (8.92 log10TCID50/mL) ranged from 2.31 to 6.95 log10TCID50/mL. UV irradiation of nanocomposites for 30 min did not change their antiviral properties against HAdV2 and HSV-1/US.