Polypyrrole : silver composite nanowire arrays by cathodic co-deposition and their electrochemical properties

2013
journal article
article
41
dc.abstract.enA simple electrochemical one-step method of synthesis of polypyrrole- silver (PPy-Ag) nanowire arrays is presented. The method is based on simultaneous cathodic polymerization and silver electrodeposition in the nanopores of homemade porous anodic aluminum oxide (AAO) templates. The synthesized 80 nm in diameter PPy nanowires have embedded Ag nanoparticles. The nanowires are characterized by scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, ultraviolet-visible-near-infrared absorption spectroscopy, and electro- chemical techniques. The morphology, chemical structure, and optical, electrochemical, and catalytic properties of the synthesized PPy-Ag nanowires are examined and compared with those of PPy nanowires. The effect of annealing the PPy-Ag nanowires above the glass transition temperature of polypyrrole on properties of the nanowires is studied. A surface segregation/aggregation of silver nanoparticles and degradation of polymer chain integrity occur during annealing. The as-prepared PPy-Ag and annealed PPy-Ag nanowire arrays possess enhanced catalytic activity toward electroreduction of hydrogen peroxide and can be used as novel and inexpensive sensors for its determination. The highest sensing activity is exhibited by the freshly prepared and annealed PPy-Ag nanowire electrode because of accumulation of catalytic centers on the surface of the nanowires (segregation of silver). However, the sensitivity of amperometric determination of $H_{2}O_{2}$ for the annealed PPy-Ag nanowire array decreases dramatically after storage. On the other hand, the as-prepared PPy-Ag nanowire arrays provide a stable in time sensing activity toward reduction of hydrogen peroxide. This can be attributed to a distribution of active Ag nanoparticles deep within the polymer matrix.pl
dc.affiliationWydział Chemii : Zakład Chemii Fizycznej i Elektrochemiipl
dc.contributor.authorHnida, Katarzyna - 106820 pl
dc.contributor.authorSulka, Grzegorz - 132161 pl
dc.contributor.authorSocha, Robert P.pl
dc.date.accessioned2015-06-08T13:50:37Z
dc.date.available2015-06-08T13:50:37Z
dc.date.issued2013pl
dc.description.number38pl
dc.description.physical19382-19392pl
dc.description.volume117pl
dc.identifier.doi10.1021/jp4038304pl
dc.identifier.eissn1932-7455pl
dc.identifier.issn1932-7447pl
dc.identifier.urihttp://ruj.uj.edu.pl/xmlui/handle/item/9018
dc.languageengpl
dc.language.containerengpl
dc.rights.licencebez licencji
dc.subtypeArticlepl
dc.titlePolypyrrole : silver composite nanowire arrays by cathodic co-deposition and their electrochemical propertiespl
dc.title.journalThe Journal of Physical Chemistry. Cpl
dc.typeJournalArticlepl
dspace.entity.typePublication
dc.abstract.enpl
A simple electrochemical one-step method of synthesis of polypyrrole- silver (PPy-Ag) nanowire arrays is presented. The method is based on simultaneous cathodic polymerization and silver electrodeposition in the nanopores of homemade porous anodic aluminum oxide (AAO) templates. The synthesized 80 nm in diameter PPy nanowires have embedded Ag nanoparticles. The nanowires are characterized by scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, ultraviolet-visible-near-infrared absorption spectroscopy, and electro- chemical techniques. The morphology, chemical structure, and optical, electrochemical, and catalytic properties of the synthesized PPy-Ag nanowires are examined and compared with those of PPy nanowires. The effect of annealing the PPy-Ag nanowires above the glass transition temperature of polypyrrole on properties of the nanowires is studied. A surface segregation/aggregation of silver nanoparticles and degradation of polymer chain integrity occur during annealing. The as-prepared PPy-Ag and annealed PPy-Ag nanowire arrays possess enhanced catalytic activity toward electroreduction of hydrogen peroxide and can be used as novel and inexpensive sensors for its determination. The highest sensing activity is exhibited by the freshly prepared and annealed PPy-Ag nanowire electrode because of accumulation of catalytic centers on the surface of the nanowires (segregation of silver). However, the sensitivity of amperometric determination of $H_{2}O_{2}$ for the annealed PPy-Ag nanowire array decreases dramatically after storage. On the other hand, the as-prepared PPy-Ag nanowire arrays provide a stable in time sensing activity toward reduction of hydrogen peroxide. This can be attributed to a distribution of active Ag nanoparticles deep within the polymer matrix.
dc.affiliationpl
Wydział Chemii : Zakład Chemii Fizycznej i Elektrochemii
dc.contributor.authorpl
Hnida, Katarzyna - 106820
dc.contributor.authorpl
Sulka, Grzegorz - 132161
dc.contributor.authorpl
Socha, Robert P.
dc.date.accessioned
2015-06-08T13:50:37Z
dc.date.available
2015-06-08T13:50:37Z
dc.date.issuedpl
2013
dc.description.numberpl
38
dc.description.physicalpl
19382-19392
dc.description.volumepl
117
dc.identifier.doipl
10.1021/jp4038304
dc.identifier.eissnpl
1932-7455
dc.identifier.issnpl
1932-7447
dc.identifier.uri
http://ruj.uj.edu.pl/xmlui/handle/item/9018
dc.languagepl
eng
dc.language.containerpl
eng
dc.rights.licence
bez licencji
dc.subtypepl
Article
dc.titlepl
Polypyrrole : silver composite nanowire arrays by cathodic co-deposition and their electrochemical properties
dc.title.journalpl
The Journal of Physical Chemistry. C
dc.typepl
JournalArticle
dspace.entity.type
Publication
Affiliations

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