Synergistic photocatalytic inactivation mechanisms of bacteria by graphene sheets grafted plasmonic AgAgX (X = Cl, Br, I) composite photocatalyst under visible light irradiation.
Identifieur interne : 000666 ( Main/Corpus ); précédent : 000665; suivant : 000667Synergistic photocatalytic inactivation mechanisms of bacteria by graphene sheets grafted plasmonic AgAgX (X = Cl, Br, I) composite photocatalyst under visible light irradiation.
Auteurs : Dehua Xia ; Taicheng An ; Guiying Li ; Wanjun Wang ; Huijun Zhao ; Po Keung WongSource :
- Water research [ 1879-2448 ] ; 2016.
English descriptors
- KwdEn :
- MESH :
- chemical , pharmacology : Hydrogen Peroxide, Silver, Silver Compounds.
- chemical : Graphite.
- drug effects : Escherichia coli.
- Catalysis, Light.
Abstract
By coupling graphene sheet and plasmonic photocatalysis technologies, a series of AgAgX/RGOs (X = Cl, Br, I; RGO = reduced graphene oxide) composites were prepared and found to be efficient antimicrobial agents for water disinfection upon visible light. Attributed to the efficient charge transfer by RGO sheets, the optimum AgAgBr/0.5% RGO could completely inactivate 2 × 10(7) cfu mL(-1) of Escherichia coli within 8 min, much faster than bare AgAgBr within 35 min. The synergistic antimicrobial mechanism of AgAgBr/0.5% RGO was studied by Ag(+) ions release evaluation, radical scavengers study, and radical determination. The enhanced photocatalytic activity of irradiated AgAgBr/0.5% RGO originated from the synergistic activities of its three components including Ag, AgBr and RGO, and the proposed mechanisms contained enhanced attraction by RGO followed by two pathways: primary oxidative stress caused by plasma induced reactive species like H2O2 and bactericidal effect of released Ag(+) ions. Furthermore, characterization of E. coli cells using SEM, fluorescent microscopy, and cytoplasmic substance leakage illustrated that VL irradiated AgAgBr/0.5% RGO could not only cause metabolic dysfunction but also destroy the cell envelope and biomolecular, while irradiated Ag(+) ions play a differential bactericidal action with a limited metabolic injury and no cell-membrane damage. The present work provides an efficient water disinfection technology and also opens a new idea in studying the antimicrobial mechanism of plasmonic photocatalyst.
DOI: 10.1016/j.watres.2016.04.055
PubMed: 27155987
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Synergistic photocatalytic inactivation mechanisms of bacteria by graphene sheets grafted plasmonic AgAgX (X = Cl, Br, I) composite photocatalyst under visible light irradiation.</title><author><name sortKey="Xia, Dehua" sort="Xia, Dehua" uniqKey="Xia D" first="Dehua" last="Xia">Dehua Xia</name><affiliation><nlm:affiliation>School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong Special Administrative Region.</nlm:affiliation></affiliation></author><author><name sortKey="An, Taicheng" sort="An, Taicheng" uniqKey="An T" first="Taicheng" last="An">Taicheng An</name><affiliation><nlm:affiliation>Institute of Environmental Health and Pollution Control and School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China. Electronic address: antc99@gdut.edu.cn.</nlm:affiliation></affiliation></author><author><name sortKey="Li, Guiying" sort="Li, Guiying" uniqKey="Li G" first="Guiying" last="Li">Guiying Li</name><affiliation><nlm:affiliation>Institute of Environmental Health and Pollution Control and School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.</nlm:affiliation></affiliation></author><author><name sortKey="Wang, Wanjun" sort="Wang, Wanjun" uniqKey="Wang W" first="Wanjun" last="Wang">Wanjun Wang</name><affiliation><nlm:affiliation>School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong Special Administrative Region.</nlm:affiliation></affiliation></author><author><name sortKey="Zhao, Huijun" sort="Zhao, Huijun" uniqKey="Zhao H" first="Huijun" last="Zhao">Huijun Zhao</name><affiliation><nlm:affiliation>Centre for Clean Environment and Energy, Gold Coast Campus, Griffith University, Queensland 4222, Australia.</nlm:affiliation></affiliation></author><author><name sortKey="Wong, Po Keung" sort="Wong, Po Keung" uniqKey="Wong P" first="Po Keung" last="Wong">Po Keung Wong</name><affiliation><nlm:affiliation>School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong Special Administrative Region. Electronic address: pkwong@cuhk.edu.hk.</nlm:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2016">2016</date><idno type="RBID">pubmed:27155987</idno><idno type="pmid">27155987</idno><idno type="doi">10.1016/j.watres.2016.04.055</idno><idno type="wicri:Area/Main/Corpus">000666</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Corpus" wicri:corpus="PubMed">000666</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Synergistic photocatalytic inactivation mechanisms of bacteria by graphene sheets grafted plasmonic AgAgX (X = Cl, Br, I) composite photocatalyst under visible light irradiation.</title><author><name sortKey="Xia, Dehua" sort="Xia, Dehua" uniqKey="Xia D" first="Dehua" last="Xia">Dehua Xia</name><affiliation><nlm:affiliation>School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong Special Administrative Region.</nlm:affiliation></affiliation></author><author><name sortKey="An, Taicheng" sort="An, Taicheng" uniqKey="An T" first="Taicheng" last="An">Taicheng An</name><affiliation><nlm:affiliation>Institute of Environmental Health and Pollution Control and School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China. Electronic address: antc99@gdut.edu.cn.</nlm:affiliation></affiliation></author><author><name sortKey="Li, Guiying" sort="Li, Guiying" uniqKey="Li G" first="Guiying" last="Li">Guiying Li</name><affiliation><nlm:affiliation>Institute of Environmental Health and Pollution Control and School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.</nlm:affiliation></affiliation></author><author><name sortKey="Wang, Wanjun" sort="Wang, Wanjun" uniqKey="Wang W" first="Wanjun" last="Wang">Wanjun Wang</name><affiliation><nlm:affiliation>School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong Special Administrative Region.</nlm:affiliation></affiliation></author><author><name sortKey="Zhao, Huijun" sort="Zhao, Huijun" uniqKey="Zhao H" first="Huijun" last="Zhao">Huijun Zhao</name><affiliation><nlm:affiliation>Centre for Clean Environment and Energy, Gold Coast Campus, Griffith University, Queensland 4222, Australia.</nlm:affiliation></affiliation></author><author><name sortKey="Wong, Po Keung" sort="Wong, Po Keung" uniqKey="Wong P" first="Po Keung" last="Wong">Po Keung Wong</name><affiliation><nlm:affiliation>School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong Special Administrative Region. Electronic address: pkwong@cuhk.edu.hk.</nlm:affiliation></affiliation></author></analytic><series><title level="j">Water research</title><idno type="eISSN">1879-2448</idno><imprint><date when="2016" type="published">2016</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Catalysis (MeSH)</term><term>Escherichia coli (drug effects)</term><term>Graphite (MeSH)</term><term>Hydrogen Peroxide (pharmacology)</term><term>Light (MeSH)</term><term>Silver (pharmacology)</term><term>Silver Compounds (pharmacology)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="pharmacology" xml:lang="en"><term>Hydrogen Peroxide</term><term>Silver</term><term>Silver Compounds</term></keywords><keywords scheme="MESH" type="chemical" xml:lang="en"><term>Graphite</term></keywords><keywords scheme="MESH" qualifier="drug effects" xml:lang="en"><term>Escherichia coli</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Catalysis</term><term>Light</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">By coupling graphene sheet and plasmonic photocatalysis technologies, a series of AgAgX/RGOs (X = Cl, Br, I; RGO = reduced graphene oxide) composites were prepared and found to be efficient antimicrobial agents for water disinfection upon visible light. Attributed to the efficient charge transfer by RGO sheets, the optimum AgAgBr/0.5% RGO could completely inactivate 2 × 10(7) cfu mL(-1) of Escherichia coli within 8 min, much faster than bare AgAgBr within 35 min. The synergistic antimicrobial mechanism of AgAgBr/0.5% RGO was studied by Ag(+) ions release evaluation, radical scavengers study, and radical determination. The enhanced photocatalytic activity of irradiated AgAgBr/0.5% RGO originated from the synergistic activities of its three components including Ag, AgBr and RGO, and the proposed mechanisms contained enhanced attraction by RGO followed by two pathways: primary oxidative stress caused by plasma induced reactive species like H2O2 and bactericidal effect of released Ag(+) ions. Furthermore, characterization of E. coli cells using SEM, fluorescent microscopy, and cytoplasmic substance leakage illustrated that VL irradiated AgAgBr/0.5% RGO could not only cause metabolic dysfunction but also destroy the cell envelope and biomolecular, while irradiated Ag(+) ions play a differential bactericidal action with a limited metabolic injury and no cell-membrane damage. The present work provides an efficient water disinfection technology and also opens a new idea in studying the antimicrobial mechanism of plasmonic photocatalyst.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">27155987</PMID><DateCompleted><Year>2017</Year><Month>05</Month><Day>04</Day></DateCompleted><DateRevised><Year>2020</Year><Month>12</Month><Day>09</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1879-2448</ISSN><JournalIssue CitedMedium="Internet"><Volume>99</Volume><PubDate><Year>2016</Year><Month>08</Month><Day>01</Day></PubDate></JournalIssue><Title>Water research</Title><ISOAbbreviation>Water Res</ISOAbbreviation></Journal><ArticleTitle>Synergistic photocatalytic inactivation mechanisms of bacteria by graphene sheets grafted plasmonic AgAgX (X = Cl, Br, I) composite photocatalyst under visible light irradiation.</ArticleTitle><Pagination><MedlinePgn>149-161</MedlinePgn></Pagination><ELocationID EIdType="pii" ValidYN="Y">S0043-1354(16)30258-5</ELocationID><ELocationID EIdType="doi" ValidYN="Y">10.1016/j.watres.2016.04.055</ELocationID><Abstract><AbstractText>By coupling graphene sheet and plasmonic photocatalysis technologies, a series of AgAgX/RGOs (X = Cl, Br, I; RGO = reduced graphene oxide) composites were prepared and found to be efficient antimicrobial agents for water disinfection upon visible light. Attributed to the efficient charge transfer by RGO sheets, the optimum AgAgBr/0.5% RGO could completely inactivate 2 × 10(7) cfu mL(-1) of Escherichia coli within 8 min, much faster than bare AgAgBr within 35 min. The synergistic antimicrobial mechanism of AgAgBr/0.5% RGO was studied by Ag(+) ions release evaluation, radical scavengers study, and radical determination. The enhanced photocatalytic activity of irradiated AgAgBr/0.5% RGO originated from the synergistic activities of its three components including Ag, AgBr and RGO, and the proposed mechanisms contained enhanced attraction by RGO followed by two pathways: primary oxidative stress caused by plasma induced reactive species like H2O2 and bactericidal effect of released Ag(+) ions. Furthermore, characterization of E. coli cells using SEM, fluorescent microscopy, and cytoplasmic substance leakage illustrated that VL irradiated AgAgBr/0.5% RGO could not only cause metabolic dysfunction but also destroy the cell envelope and biomolecular, while irradiated Ag(+) ions play a differential bactericidal action with a limited metabolic injury and no cell-membrane damage. The present work provides an efficient water disinfection technology and also opens a new idea in studying the antimicrobial mechanism of plasmonic photocatalyst.</AbstractText><CopyrightInformation>Copyright © 2016 Elsevier Ltd. All rights reserved.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Xia</LastName><ForeName>Dehua</ForeName><Initials>D</Initials><AffiliationInfo><Affiliation>School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong Special Administrative Region.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>An</LastName><ForeName>Taicheng</ForeName><Initials>T</Initials><AffiliationInfo><Affiliation>Institute of Environmental Health and Pollution Control and School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China. Electronic address: antc99@gdut.edu.cn.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Li</LastName><ForeName>Guiying</ForeName><Initials>G</Initials><AffiliationInfo><Affiliation>Institute of Environmental Health and Pollution Control and School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Wang</LastName><ForeName>Wanjun</ForeName><Initials>W</Initials><AffiliationInfo><Affiliation>School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong Special Administrative Region.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Zhao</LastName><ForeName>Huijun</ForeName><Initials>H</Initials><AffiliationInfo><Affiliation>Centre for Clean Environment and Energy, Gold Coast Campus, Griffith University, Queensland 4222, Australia.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Wong</LastName><ForeName>Po Keung</ForeName><Initials>PK</Initials><AffiliationInfo><Affiliation>School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong Special Administrative Region. Electronic address: pkwong@cuhk.edu.hk.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2016</Year><Month>04</Month><Day>23</Day></ArticleDate></Article><MedlineJournalInfo><Country>England</Country><MedlineTA>Water Res</MedlineTA><NlmUniqueID>0105072</NlmUniqueID><ISSNLinking>0043-1354</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D018030">Silver Compounds</NameOfSubstance></Chemical><Chemical><RegistryNumber>3M4G523W1G</RegistryNumber><NameOfSubstance UI="D012834">Silver</NameOfSubstance></Chemical><Chemical><RegistryNumber>7782-42-5</RegistryNumber><NameOfSubstance UI="D006108">Graphite</NameOfSubstance></Chemical><Chemical><RegistryNumber>BBX060AN9V</RegistryNumber><NameOfSubstance UI="D006861">Hydrogen Peroxide</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D002384" MajorTopicYN="N">Catalysis</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D004926" MajorTopicYN="N">Escherichia coli</DescriptorName><QualifierName UI="Q000187" MajorTopicYN="N">drug effects</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D006108" MajorTopicYN="Y">Graphite</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D006861" MajorTopicYN="N">Hydrogen Peroxide</DescriptorName><QualifierName UI="Q000494" MajorTopicYN="N">pharmacology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D008027" MajorTopicYN="N">Light</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D012834" MajorTopicYN="N">Silver</DescriptorName><QualifierName UI="Q000494" MajorTopicYN="N">pharmacology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D018030" MajorTopicYN="N">Silver Compounds</DescriptorName><QualifierName UI="Q000494" MajorTopicYN="Y">pharmacology</QualifierName></MeshHeading></MeshHeadingList><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="Y">Ag(+) ions</Keyword><Keyword MajorTopicYN="Y">Bacterial inactivation</Keyword><Keyword MajorTopicYN="Y">Plasmonic photocatalyst</Keyword><Keyword MajorTopicYN="Y">Synergistic mechanism</Keyword><Keyword MajorTopicYN="Y">Visible light</Keyword></KeywordList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2016</Year><Month>01</Month><Day>28</Day></PubMedPubDate><PubMedPubDate PubStatus="revised"><Year>2016</Year><Month>04</Month><Day>21</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2016</Year><Month>04</Month><Day>21</Day></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2016</Year><Month>5</Month><Day>9</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2016</Year><Month>5</Month><Day>9</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2017</Year><Month>5</Month><Day>5</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">27155987</ArticleId><ArticleId IdType="pii">S0043-1354(16)30258-5</ArticleId><ArticleId IdType="doi">10.1016/j.watres.2016.04.055</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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