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Article: Light-Activated Rapid Disinfection by Accelerated Charge Transfer in Red Phosphorus/ZnO Heterointerface

TitleLight-Activated Rapid Disinfection by Accelerated Charge Transfer in Red Phosphorus/ZnO Heterointerface
Authors
Keywordsdisinfection
heterointerfaces
photocatalysis
red phosphorus
ZnO
Issue Date2019
PublisherWiley - VCH Verlag GmbH & Co. KGaA. The Journal's web site is located at http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)2366-9608
Citation
Small Methods, 2019, v. 3 n. 3, p. article no. 1900048 How to Cite?
AbstractA red phosphorus (RP)/ZnO heterojunction thin film is developed to harvest solar or light emitting diode (LED) light for rapid, effective, ecofriendly, lower‐cost, and safe disinfection, which is convenient for universal and large‐scale deposition. The most stable geometrical structure of the RP/ZnO heterojunction, i.e., an RP (001) plane and a ZnO (002) plane, exhibits charge redistribution largely at the interface region. Therefore, the effective interfacial charge transfer and the improved separation efficiency of photogenerated electron–hole pairs can strongly boost reactive oxygen species (ROS)‐generation reactions to enhance photocatalytic bacterial inactivation. The excellent light‐activated point‐of use disinfection can be achieved even through LED light of phone. Additionally, the RP/ZnO heterojunction also possesses excellent solar light‐to‐heat conversion efficiency, leading to further lethality to bacteria through hyperthermia. Antibacterial efficacy of 99.96 ± 0.03% against Staphylococcus aureus at 5 min and 99.97 ± 0.02% against Escherichia coli at 4 min can be attributed to the synergetic antibacterial activity of solar photocatalysis and photothermal effect (more than 50 °C in 2 min). This platform provides a surface strategy for designing synergetic photocatalytic and photothermal materials to fully harvest solar energy for not only water disinfection but also antibacterial surfaces in medical facilities, touch screen devices, or seawater desalination.
Persistent Identifierhttp://hdl.handle.net/10722/278234
ISSN
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLI, J-
dc.contributor.authorLIU, X-
dc.contributor.authorTAN, L-
dc.contributor.authorLIANG, Y-
dc.contributor.authorCUI, Z-
dc.contributor.authorYANG, X-
dc.contributor.authorZHU, S-
dc.contributor.authorLI, Z-
dc.contributor.authorZHENG, Y-
dc.contributor.authorYeung, KWK-
dc.contributor.authorWANG, X-
dc.contributor.authorWU, S-
dc.date.accessioned2019-10-04T08:10:04Z-
dc.date.available2019-10-04T08:10:04Z-
dc.date.issued2019-
dc.identifier.citationSmall Methods, 2019, v. 3 n. 3, p. article no. 1900048-
dc.identifier.issn2366-9608-
dc.identifier.urihttp://hdl.handle.net/10722/278234-
dc.description.abstractA red phosphorus (RP)/ZnO heterojunction thin film is developed to harvest solar or light emitting diode (LED) light for rapid, effective, ecofriendly, lower‐cost, and safe disinfection, which is convenient for universal and large‐scale deposition. The most stable geometrical structure of the RP/ZnO heterojunction, i.e., an RP (001) plane and a ZnO (002) plane, exhibits charge redistribution largely at the interface region. Therefore, the effective interfacial charge transfer and the improved separation efficiency of photogenerated electron–hole pairs can strongly boost reactive oxygen species (ROS)‐generation reactions to enhance photocatalytic bacterial inactivation. The excellent light‐activated point‐of use disinfection can be achieved even through LED light of phone. Additionally, the RP/ZnO heterojunction also possesses excellent solar light‐to‐heat conversion efficiency, leading to further lethality to bacteria through hyperthermia. Antibacterial efficacy of 99.96 ± 0.03% against Staphylococcus aureus at 5 min and 99.97 ± 0.02% against Escherichia coli at 4 min can be attributed to the synergetic antibacterial activity of solar photocatalysis and photothermal effect (more than 50 °C in 2 min). This platform provides a surface strategy for designing synergetic photocatalytic and photothermal materials to fully harvest solar energy for not only water disinfection but also antibacterial surfaces in medical facilities, touch screen devices, or seawater desalination.-
dc.languageeng-
dc.publisherWiley - VCH Verlag GmbH & Co. KGaA. The Journal's web site is located at http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)2366-9608-
dc.relation.ispartofSmall Methods-
dc.rightsThis is the peer reviewed version of the following article: [FULL CITE], which has been published in final form at [Link to final article using the DOI]. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.-
dc.subjectdisinfection-
dc.subjectheterointerfaces-
dc.subjectphotocatalysis-
dc.subjectred phosphorus-
dc.subjectZnO-
dc.titleLight-Activated Rapid Disinfection by Accelerated Charge Transfer in Red Phosphorus/ZnO Heterointerface-
dc.typeArticle-
dc.identifier.emailYeung, KWK: wkkyeung@hku.hk-
dc.identifier.authorityYeung, KWK=rp00309-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1002/smtd.201900048-
dc.identifier.hkuros306964-
dc.identifier.volume3-
dc.identifier.issue3-
dc.identifier.spagearticle no. 1900048-
dc.identifier.epagearticle no. 1900048-
dc.identifier.isiWOS:000461577400010-
dc.publisher.placeGermany-

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