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Article: Ce and Er Co-doped TiO2 for rapid bacteria- killing using visible light

TitleCe and Er Co-doped TiO2 for rapid bacteria- killing using visible light
Authors
KeywordsPhotocatalytic
TiO2
Antibacterial
Doping
Light responsive
Issue Date2020
PublisherKe Ai Publishing Communications Ltd. The Journal's web site is located at http://www.sciencedirect.com/science/journal/2452199X
Citation
Bioactive Materials, 2020, v. 5 n. 2, p. 201-209 How to Cite?
AbstractBacterial infection and related diseases are threatening the health of human beings. Photocatalytic disinfection as a simple and low-cost disinfection strategy is attracting more and more attention. In this work, TiO2 nanoparticles (NPs) were modified by co-doping of Ce and Er using the sol–gel method, which endowed TiO2 NPs with enhanced visible light photocatalytic performance but not pure ultraviolet photocatalytic properties compared the untreated TiO2. Our results disclosed that as the doping content of Er increased, the photocatalytic activity of modified TiO2 NPs initially increased and subsequently decreased. The same trend occurred for Ce doping. When the doping dose of Er and Ce is 0.5 mol% and 0.2 mol%, the 0.5Ce0.2Ti–O calcined at 800 °C presented the best antibacterial properties, with the antibacterial efficiency of 91.23% and 92.8% for Staphylococcus aureus and Escherichia coli, respectively. The existence of Er ions is thought to successfully turn the near-infrared radiation into visible region, which is easier to be absorbed by TiO2 NPs. Meanwhile, the addition of Ce ions can effectively extend spectral response range and inhibit the recombination of electrons and holes, enhancing the photocatalytic disinfection activity of co-doped TiO2.
Persistent Identifierhttp://hdl.handle.net/10722/289800
ISSN
PubMed Central ID
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorREN, YW-
dc.contributor.authorHAN, Y-
dc.contributor.authorLI, Z-
dc.contributor.authorLIU, X-
dc.contributor.authorZHU, S-
dc.contributor.authorLIANG, Y-
dc.contributor.authorYeung, KWK-
dc.contributor.authorWU, S-
dc.date.accessioned2020-10-22T08:17:39Z-
dc.date.available2020-10-22T08:17:39Z-
dc.date.issued2020-
dc.identifier.citationBioactive Materials, 2020, v. 5 n. 2, p. 201-209-
dc.identifier.issn2452-199X-
dc.identifier.urihttp://hdl.handle.net/10722/289800-
dc.description.abstractBacterial infection and related diseases are threatening the health of human beings. Photocatalytic disinfection as a simple and low-cost disinfection strategy is attracting more and more attention. In this work, TiO2 nanoparticles (NPs) were modified by co-doping of Ce and Er using the sol–gel method, which endowed TiO2 NPs with enhanced visible light photocatalytic performance but not pure ultraviolet photocatalytic properties compared the untreated TiO2. Our results disclosed that as the doping content of Er increased, the photocatalytic activity of modified TiO2 NPs initially increased and subsequently decreased. The same trend occurred for Ce doping. When the doping dose of Er and Ce is 0.5 mol% and 0.2 mol%, the 0.5Ce0.2Ti–O calcined at 800 °C presented the best antibacterial properties, with the antibacterial efficiency of 91.23% and 92.8% for Staphylococcus aureus and Escherichia coli, respectively. The existence of Er ions is thought to successfully turn the near-infrared radiation into visible region, which is easier to be absorbed by TiO2 NPs. Meanwhile, the addition of Ce ions can effectively extend spectral response range and inhibit the recombination of electrons and holes, enhancing the photocatalytic disinfection activity of co-doped TiO2.-
dc.languageeng-
dc.publisherKe Ai Publishing Communications Ltd. The Journal's web site is located at http://www.sciencedirect.com/science/journal/2452199X-
dc.relation.ispartofBioactive Materials-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.subjectPhotocatalytic-
dc.subjectTiO2-
dc.subjectAntibacterial-
dc.subjectDoping-
dc.subjectLight responsive-
dc.titleCe and Er Co-doped TiO2 for rapid bacteria- killing using visible light-
dc.typeArticle-
dc.identifier.emailYeung, KWK: wkkyeung@hku.hk-
dc.identifier.authorityYeung, KWK=rp00309-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1016/j.bioactmat.2020.02.005-
dc.identifier.pmid32123773-
dc.identifier.pmcidPMC7037594-
dc.identifier.scopuseid_2-s2.0-85079696586-
dc.identifier.hkuros316857-
dc.identifier.volume5-
dc.identifier.issue2-
dc.identifier.spage201-
dc.identifier.epage209-
dc.identifier.isiWOS:000533604500025-
dc.publisher.placeChina-
dc.identifier.issnl2452-199X-

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