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Article: Oxidative dissolution of silver nanoparticles by dioxygen: A kinetic and mechanistic study

TitleOxidative dissolution of silver nanoparticles by dioxygen: A kinetic and mechanistic study
Authors
Keywordskinetics
nanoparticles
oxidation
oxygen
silver
Issue Date2011
PublisherWiley - V C H Verlag GmbH & Co. KGaA. The Journal's web site is located at http://www.wiley-vch.de/publish/en/journals/alphabeticIndex/2451
Citation
Chemistry - An Asian Journal, 2011, v. 6 n. 9, p. 2506-2511 How to Cite?
AbstractWe have recently reported a kinetic and mechanistic study on oxidative dissolution of silver nanoparticles (AgNPs) by H 2O 2. In the present study, the parameters that govern the dissolution of AgNPs by O 2 were revealed by using UV/Vis spectrophotometry. Under the same reaction conditions (Tris-HOAc, pH 8.5, I=0.1 M at 25 °C) the apparent dissolution rate (k app) of AgNPs (10±2.8 nm) by O 2 is about 100-fold slower than that of H 2O 2. The reaction rate is first-order with respect to [Ag 0], [O 2], and [Tris] T, and inverse first-order with respect to [Ag +] (where [Ag 0]=total concentration of Ag metal and [Tris] T=total concentration of Tris). The rate constant is dependent on the size of AgNPs. No free superoxide (O 2 -) and hydroxyl radical (·OH) were detected by trapping experiments. On the basis of kinetic and trapping experiments, an amine-activated pathway for the oxidation of AgNPs by O 2 is proposed. Copyright © 2011 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.
Persistent Identifierhttp://hdl.handle.net/10722/159378
ISSN
2014 Impact Factor: 4.587
2014 SCImago Journal Rankings: 1.591
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorHo, CMen_HK
dc.contributor.authorWong, CKen_HK
dc.contributor.authorYau, SKWen_HK
dc.contributor.authorLok, CNen_HK
dc.contributor.authorChe, CMen_HK
dc.date.accessioned2012-08-16T05:48:56Z-
dc.date.available2012-08-16T05:48:56Z-
dc.date.issued2011en_HK
dc.identifier.citationChemistry - An Asian Journal, 2011, v. 6 n. 9, p. 2506-2511en_HK
dc.identifier.issn1861-4728en_HK
dc.identifier.urihttp://hdl.handle.net/10722/159378-
dc.description.abstractWe have recently reported a kinetic and mechanistic study on oxidative dissolution of silver nanoparticles (AgNPs) by H 2O 2. In the present study, the parameters that govern the dissolution of AgNPs by O 2 were revealed by using UV/Vis spectrophotometry. Under the same reaction conditions (Tris-HOAc, pH 8.5, I=0.1 M at 25 °C) the apparent dissolution rate (k app) of AgNPs (10±2.8 nm) by O 2 is about 100-fold slower than that of H 2O 2. The reaction rate is first-order with respect to [Ag 0], [O 2], and [Tris] T, and inverse first-order with respect to [Ag +] (where [Ag 0]=total concentration of Ag metal and [Tris] T=total concentration of Tris). The rate constant is dependent on the size of AgNPs. No free superoxide (O 2 -) and hydroxyl radical (·OH) were detected by trapping experiments. On the basis of kinetic and trapping experiments, an amine-activated pathway for the oxidation of AgNPs by O 2 is proposed. Copyright © 2011 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.en_HK
dc.languageengen_US
dc.publisherWiley - V C H Verlag GmbH & Co. KGaA. The Journal's web site is located at http://www.wiley-vch.de/publish/en/journals/alphabeticIndex/2451en_HK
dc.relation.ispartofChemistry - An Asian Journalen_HK
dc.subjectkineticsen_HK
dc.subjectnanoparticlesen_HK
dc.subjectoxidationen_HK
dc.subjectoxygenen_HK
dc.subjectsilveren_HK
dc.titleOxidative dissolution of silver nanoparticles by dioxygen: A kinetic and mechanistic studyen_HK
dc.typeArticleen_HK
dc.identifier.emailHo, CM: rickyho@hkucc.hku.hken_HK
dc.identifier.emailLok, CN: cnlok@hku.hken_HK
dc.identifier.emailChe, CM: cmche@hku.hken_HK
dc.identifier.authorityHo, CM=rp00705en_HK
dc.identifier.authorityLok, CN=rp00752en_HK
dc.identifier.authorityChe, CM=rp00670en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1002/asia.201100034en_HK
dc.identifier.pmid21608134-
dc.identifier.scopuseid_2-s2.0-80051767678en_HK
dc.identifier.hkuros205080en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-80051767678&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume6en_HK
dc.identifier.issue9en_HK
dc.identifier.spage2506en_HK
dc.identifier.epage2511en_HK
dc.identifier.isiWOS:000294465800042-
dc.publisher.placeGermanyen_HK
dc.identifier.scopusauthoridHo, CM=12807243800en_HK
dc.identifier.scopusauthoridWong, CK=49561883200en_HK
dc.identifier.scopusauthoridYau, SKW=26647235100en_HK
dc.identifier.scopusauthoridLok, CN=7006410829en_HK
dc.identifier.scopusauthoridChe, CM=7102442791en_HK

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