Visible-Light Active Flexible and Durable Photocatalytic Antibacterial Ethylene-co-vinyl Acetate—Ag/AgCl/α-Fe<sub>2</sub>O<sub>3</sub> Composite Coating
When particles are mixed in polymer, particle surfaces become passivated by polymer matrix, leading to significantly reduced photocatalytic and, thus, also reduced antibacterial activity, as the catalytic particles become isolated from the outer environment and microorganisms reaching the surface. H...
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MDPI AG
2022-06-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/12/1984 |
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| author | Svetlana Vihodceva Andris Šutka Maarja Otsus Heiki Vija Liga Grase Anne Kahru Kaja Kasemets |
| author_facet | Svetlana Vihodceva Andris Šutka Maarja Otsus Heiki Vija Liga Grase Anne Kahru Kaja Kasemets |
| author_sort | Svetlana Vihodceva |
| collection | DOAJ |
| description | When particles are mixed in polymer, particle surfaces become passivated by polymer matrix, leading to significantly reduced photocatalytic and, thus, also reduced antibacterial activity, as the catalytic particles become isolated from the outer environment and microorganisms reaching the surface. Herein, we demonstrate a facile and rapid approach for coating preparation at room temperature, yielding good adhesion of particles in combination with the particles’ interface location. Flexible ethylene-co-vinyl acetate Ag/AgCl/α-Fe<sub>2</sub>O<sub>3</sub> composite coatings were prepared by the spin-coating method. The synthesized photocatalytically active coating surface exhibited a distinct and rapid inhibition of bacterial growth, with at least a 7-log reduction of gram-positive bacteria <i>Staphylococcus aureus</i> viability after 30 min of visible-light illumination. We also analyzed the shedding of the Ag-ions and reactive oxygen species production from the composite coating and showed that reactive oxygen species played the main role in the photocatalytic bacterial inactivation, destroying the bacteria cell as proven by the Confocal Laser Scanning Microscopy. |
| first_indexed | 2024-03-09T22:52:57Z |
| format | Article |
| id | doaj.art-218353171da0446e84533b95c52a49b5 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T22:52:57Z |
| publishDate | 2022-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-218353171da0446e84533b95c52a49b52023-11-23T18:15:37ZengMDPI AGNanomaterials2079-49912022-06-011212198410.3390/nano12121984Visible-Light Active Flexible and Durable Photocatalytic Antibacterial Ethylene-co-vinyl Acetate—Ag/AgCl/α-Fe<sub>2</sub>O<sub>3</sub> Composite CoatingSvetlana Vihodceva0Andris Šutka1Maarja Otsus2Heiki Vija3Liga Grase4Anne Kahru5Kaja Kasemets6The Institute of Materials and Surface Engineering, Faculty of Materials Science and Applied Chemistry, Riga Technical University, 7 Paula Valdena Str., LV-1048 Riga, LatviaThe Institute of Materials and Surface Engineering, Faculty of Materials Science and Applied Chemistry, Riga Technical University, 7 Paula Valdena Str., LV-1048 Riga, LatviaNational Institute of Chemical Physics and Biophysics, Laboratory of Environmental Toxicology, Akadeemia tee 23, 12618 Tallinn, EstoniaNational Institute of Chemical Physics and Biophysics, Laboratory of Environmental Toxicology, Akadeemia tee 23, 12618 Tallinn, EstoniaThe Institute of Materials and Surface Engineering, Faculty of Materials Science and Applied Chemistry, Riga Technical University, 7 Paula Valdena Str., LV-1048 Riga, LatviaNational Institute of Chemical Physics and Biophysics, Laboratory of Environmental Toxicology, Akadeemia tee 23, 12618 Tallinn, EstoniaNational Institute of Chemical Physics and Biophysics, Laboratory of Environmental Toxicology, Akadeemia tee 23, 12618 Tallinn, EstoniaWhen particles are mixed in polymer, particle surfaces become passivated by polymer matrix, leading to significantly reduced photocatalytic and, thus, also reduced antibacterial activity, as the catalytic particles become isolated from the outer environment and microorganisms reaching the surface. Herein, we demonstrate a facile and rapid approach for coating preparation at room temperature, yielding good adhesion of particles in combination with the particles’ interface location. Flexible ethylene-co-vinyl acetate Ag/AgCl/α-Fe<sub>2</sub>O<sub>3</sub> composite coatings were prepared by the spin-coating method. The synthesized photocatalytically active coating surface exhibited a distinct and rapid inhibition of bacterial growth, with at least a 7-log reduction of gram-positive bacteria <i>Staphylococcus aureus</i> viability after 30 min of visible-light illumination. We also analyzed the shedding of the Ag-ions and reactive oxygen species production from the composite coating and showed that reactive oxygen species played the main role in the photocatalytic bacterial inactivation, destroying the bacteria cell as proven by the Confocal Laser Scanning Microscopy.https://www.mdpi.com/2079-4991/12/12/1984nanoparticlesantibacterialphotocatalysishematitecoatingsilver |
| spellingShingle | Svetlana Vihodceva Andris Šutka Maarja Otsus Heiki Vija Liga Grase Anne Kahru Kaja Kasemets Visible-Light Active Flexible and Durable Photocatalytic Antibacterial Ethylene-co-vinyl Acetate—Ag/AgCl/α-Fe<sub>2</sub>O<sub>3</sub> Composite Coating Nanomaterials nanoparticles antibacterial photocatalysis hematite coating silver |
| title | Visible-Light Active Flexible and Durable Photocatalytic Antibacterial Ethylene-co-vinyl Acetate—Ag/AgCl/α-Fe<sub>2</sub>O<sub>3</sub> Composite Coating |
| title_full | Visible-Light Active Flexible and Durable Photocatalytic Antibacterial Ethylene-co-vinyl Acetate—Ag/AgCl/α-Fe<sub>2</sub>O<sub>3</sub> Composite Coating |
| title_fullStr | Visible-Light Active Flexible and Durable Photocatalytic Antibacterial Ethylene-co-vinyl Acetate—Ag/AgCl/α-Fe<sub>2</sub>O<sub>3</sub> Composite Coating |
| title_full_unstemmed | Visible-Light Active Flexible and Durable Photocatalytic Antibacterial Ethylene-co-vinyl Acetate—Ag/AgCl/α-Fe<sub>2</sub>O<sub>3</sub> Composite Coating |
| title_short | Visible-Light Active Flexible and Durable Photocatalytic Antibacterial Ethylene-co-vinyl Acetate—Ag/AgCl/α-Fe<sub>2</sub>O<sub>3</sub> Composite Coating |
| title_sort | visible light active flexible and durable photocatalytic antibacterial ethylene co vinyl acetate ag agcl α fe sub 2 sub o sub 3 sub composite coating |
| topic | nanoparticles antibacterial photocatalysis hematite coating silver |
| url | https://www.mdpi.com/2079-4991/12/12/1984 |
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