Polymer Membrane Modified with Photocatalytic and Plasmonic Nanoparticles for Self-Cleaning Filters.
Aliaksandr BurkoSiarhei ZavatskiArina BaturovaMakhina KholiboevaJulia KozinaKseniya KravtsunovaVladimir PopovArtem GudokSergey DubkovStanislav KhartovHanna V BandarenkaPublished in: Polymers (2023)
In this study, we developed a filtering material for facial masks, which is capable of trapping and subsequent inactivation of bacteria under white light emitting diodes (LED) or sunlight irradiation. Such a functionality is achieved via the modification of the composite membrane based on porous polymer with photocatalytic (TiO 2 ) and plasmonic (Ag) nanoparticles. The porous polymer is produced by means of a computer numerical control machine, which rolls a photoresist/thermoplastic mixture into a ~20-µm-thick membrane followed by its thermal/ultraviolet (UV) hardening and porosification. TiO 2 nanoparticles are prepared by hydrothermal and sol-gel techniques. Colloidal synthesis is utilized to fabricate Ag nanoparticles. The TiO 2 photocatalytic activity under UV excitation as well as a photothermal effect generated by plasmonic Ag nanoparticles subjected to LED irradiation are studied by the assessment of methylene blue (MB) decomposition. We demonstrate that, in contrast to the filter of the standard facial medical mask, the polymer membrane modified with spray-coated TiO 2 and Ag nanoparticles prevents the penetration of bacillus subtilis from its top to bottom side and significantly inhibits bacterial growth when exposed to LED or sunlight.
Keyphrases
- visible light
- quantum dots
- highly efficient
- bacillus subtilis
- magnetic resonance
- healthcare
- walled carbon nanotubes
- drug delivery
- deep learning
- magnetic resonance imaging
- risk assessment
- energy transfer
- single molecule
- mouse model
- label free
- reduced graphene oxide
- tissue engineering
- clinical evaluation
- obstructive sleep apnea