SilverBacteriV1, Main, Corpus, bibRecord, 000348

Bactericidal Properties of Plasmonic Photocatalysts Composed of Noble Metal Nanoparticles on Faceted Anatase Titania.

Identifieur interne : 000348 ( Main/Corpus ); précédent : 000347; suivant : 000349

Bactericidal Properties of Plasmonic Photocatalysts Composed of Noble Metal Nanoparticles on Faceted Anatase Titania.

Auteurs : Maya Endo ; Marcin Janczarek ; Zhishun Wei ; Kunlei Wang ; Agata Markowska-Szczupak ; Bunsho Ohtani ; Ewa Kowalska

Source :

Journal of nanoscience and nanotechnology [ 1533-4880 ] ; 2019.

RBID : pubmed:30327054

Abstract

Octahedral anatase particles (OAP) with eight equivalent {101} facets and decahedral anatase particles (DAP) with two additional {001} facets were modified with nanoparticles of noble metals (silver, copper, gold and platinum) by photodeposition, and applied for inactivation of Escherichia coli K12. XRD, DRS, XPS and STEM analyses confirmed the presence of noble metals nanoparticles (NPs) on the surface of faceted titania samples. Both OAP and DAP samples modified with silver and copper exhibited high bactericidal activities under visible light irradiation. It was also found that DAP under UV irradiation showed surprisingly high bactericidal activity, which could be attributed to efficient generation of reactive oxygen species, due to intrinsic properties of DAP, i.e., charge carriers' separation (migration of electrons and holes to {101} and {001} facets, respectively). However, an unexpected decrease in activity after DAP modification with gold and platinum NPs (mainly deposited on {101} facets) suggested that bacteria cells were directly decomposed on DAP surface. SEM images revealed that silver-modified samples caused severe damages of cell walls and membranes, due to antibacterial properties of silver (in the dark) and photocatalytic effect under visible and UV irradiation.

DOI: 10.1166/jnn.2019.15780
PubMed: 30327054

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pubmed:30327054

Le document en format XML

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<author><name sortKey="Endo, Maya" sort="Endo, Maya" uniqKey="Endo M" first="Maya" last="Endo">Maya Endo</name>
<affiliation><nlm:affiliation>Institute for Catalysis, Hokkaido University, N21, W8, 001-0021 Sapporo, Japan.</nlm:affiliation>
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<author><name sortKey="Janczarek, Marcin" sort="Janczarek, Marcin" uniqKey="Janczarek M" first="Marcin" last="Janczarek">Marcin Janczarek</name>
<affiliation><nlm:affiliation>Institute for Catalysis, Hokkaido University, N21, W8, 001-0021 Sapporo, Japan.</nlm:affiliation>
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<author><name sortKey="Wei, Zhishun" sort="Wei, Zhishun" uniqKey="Wei Z" first="Zhishun" last="Wei">Zhishun Wei</name>
<affiliation><nlm:affiliation>Institute for Catalysis, Hokkaido University, N21, W8, 001-0021 Sapporo, Japan.</nlm:affiliation>
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<author><name sortKey="Wang, Kunlei" sort="Wang, Kunlei" uniqKey="Wang K" first="Kunlei" last="Wang">Kunlei Wang</name>
<affiliation><nlm:affiliation>Institute for Catalysis, Hokkaido University, N21, W8, 001-0021 Sapporo, Japan.</nlm:affiliation>
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<author><name sortKey="Markowska Szczupak, Agata" sort="Markowska Szczupak, Agata" uniqKey="Markowska Szczupak A" first="Agata" last="Markowska-Szczupak">Agata Markowska-Szczupak</name>
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<author><name sortKey="Ohtani, Bunsho" sort="Ohtani, Bunsho" uniqKey="Ohtani B" first="Bunsho" last="Ohtani">Bunsho Ohtani</name>
<affiliation><nlm:affiliation>Institute for Catalysis, Hokkaido University, N21, W8, 001-0021 Sapporo, Japan.</nlm:affiliation>
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<author><name sortKey="Kowalska, Ewa" sort="Kowalska, Ewa" uniqKey="Kowalska E" first="Ewa" last="Kowalska">Ewa Kowalska</name>
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<author><name sortKey="Janczarek, Marcin" sort="Janczarek, Marcin" uniqKey="Janczarek M" first="Marcin" last="Janczarek">Marcin Janczarek</name>
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<author><name sortKey="Wang, Kunlei" sort="Wang, Kunlei" uniqKey="Wang K" first="Kunlei" last="Wang">Kunlei Wang</name>
<affiliation><nlm:affiliation>Institute for Catalysis, Hokkaido University, N21, W8, 001-0021 Sapporo, Japan.</nlm:affiliation>
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<author><name sortKey="Markowska Szczupak, Agata" sort="Markowska Szczupak, Agata" uniqKey="Markowska Szczupak A" first="Agata" last="Markowska-Szczupak">Agata Markowska-Szczupak</name>
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<author><name sortKey="Ohtani, Bunsho" sort="Ohtani, Bunsho" uniqKey="Ohtani B" first="Bunsho" last="Ohtani">Bunsho Ohtani</name>
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<author><name sortKey="Kowalska, Ewa" sort="Kowalska, Ewa" uniqKey="Kowalska E" first="Ewa" last="Kowalska">Ewa Kowalska</name>
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<front><div type="abstract" xml:lang="en">Octahedral anatase particles (OAP) with eight equivalent {101} facets and decahedral anatase particles (DAP) with two additional {001} facets were modified with nanoparticles of noble metals (silver, copper, gold and platinum) by photodeposition, and applied for inactivation of <i>Escherichia coli</i>
 K12. XRD, DRS, XPS and STEM analyses confirmed the presence of noble metals nanoparticles (NPs) on the surface of faceted titania samples. Both OAP and DAP samples modified with silver and copper exhibited high bactericidal activities under visible light irradiation. It was also found that DAP under UV irradiation showed surprisingly high bactericidal activity, which could be attributed to efficient generation of reactive oxygen species, due to intrinsic properties of DAP, i.e., charge carriers' separation (migration of electrons and holes to {101} and {001} facets, respectively). However, an unexpected decrease in activity after DAP modification with gold and platinum NPs (mainly deposited on {101} facets) suggested that bacteria cells were directly decomposed on DAP surface. SEM images revealed that silver-modified samples caused severe damages of cell walls and membranes, due to antibacterial properties of silver (in the dark) and photocatalytic effect under visible and UV irradiation.</div>
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<Abstract><AbstractText>Octahedral anatase particles (OAP) with eight equivalent {101} facets and decahedral anatase particles (DAP) with two additional {001} facets were modified with nanoparticles of noble metals (silver, copper, gold and platinum) by photodeposition, and applied for inactivation of <i>Escherichia coli</i>
 K12. XRD, DRS, XPS and STEM analyses confirmed the presence of noble metals nanoparticles (NPs) on the surface of faceted titania samples. Both OAP and DAP samples modified with silver and copper exhibited high bactericidal activities under visible light irradiation. It was also found that DAP under UV irradiation showed surprisingly high bactericidal activity, which could be attributed to efficient generation of reactive oxygen species, due to intrinsic properties of DAP, i.e., charge carriers' separation (migration of electrons and holes to {101} and {001} facets, respectively). However, an unexpected decrease in activity after DAP modification with gold and platinum NPs (mainly deposited on {101} facets) suggested that bacteria cells were directly decomposed on DAP surface. SEM images revealed that silver-modified samples caused severe damages of cell walls and membranes, due to antibacterial properties of silver (in the dark) and photocatalytic effect under visible and UV irradiation.</AbstractText>
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Bactericidal Properties of Plasmonic Photocatalysts Composed of Noble Metal Nanoparticles on Faceted Anatase Titania.

Bactericidal Properties of Plasmonic Photocatalysts Composed of Noble Metal Nanoparticles on Faceted Anatase Titania.

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Abstract

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