Gold nanoparticles stabilized by modified halloysite nanotubes for catalytic applications

Giuseppe Lazzara, Carmelo Giuseppe Colletti, Serena Riela, Marina Massaro, Susanna Guernelli, Valeria La Parola, Nelsi Zaccheroni, Valeria La Parola

Risultato della ricerca: Article

4 Citazioni (Scopus)

Abstract

A highly sustainable prototype of a flow system based on gold nanoparticles (4.2 nm) supported on thiol‐functionalized halloysite nanotubes (HNTs) was developed for catalytic applications. The catalytic performances were evaluated using the reduction of 4‐nitrophenol to 4‐aminophenol as a model system. Under the best experimental conditions (0.0001 mol%, 1.97 × 10−8 mg of Au nanoparticles), an impressive apparent turnover frequency value up to 2 204 530 h−1 was achieved and the halloysite‐based catalyst showed full recyclability even after ten cycles. The high catalytic activity confirms the importance of the use of HNTs as support for Au nanoparticles that can exert a synergistic effect both as medium for transfer of electrons from borohydride ions to 4‐nitrophenol and by modulating interfacial electron transfer dynamics. With the application of flow technology, the obtained heterogeneous HNT@Au catalyst was fully recovered and reused for at least one month.
Lingua originaleEnglish
Numero di pagine11
RivistaApplied Organometallic Chemistry
Stato di pubblicazionePublished - 2019

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Gold
Nanotubes
Nanoparticles
Borohydrides
Catalysts
Electrons
Catalyst activity
Ions
clay

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Inorganic Chemistry

Cita questo

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title = "Gold nanoparticles stabilized by modified halloysite nanotubes for catalytic applications",
abstract = "A highly sustainable prototype of a flow system based on gold nanoparticles (4.2 nm) supported on thiol‐functionalized halloysite nanotubes (HNTs) was developed for catalytic applications. The catalytic performances were evaluated using the reduction of 4‐nitrophenol to 4‐aminophenol as a model system. Under the best experimental conditions (0.0001 mol{\%}, 1.97 × 10−8 mg of Au nanoparticles), an impressive apparent turnover frequency value up to 2 204 530 h−1 was achieved and the halloysite‐based catalyst showed full recyclability even after ten cycles. The high catalytic activity confirms the importance of the use of HNTs as support for Au nanoparticles that can exert a synergistic effect both as medium for transfer of electrons from borohydride ions to 4‐nitrophenol and by modulating interfacial electron transfer dynamics. With the application of flow technology, the obtained heterogeneous HNT@Au catalyst was fully recovered and reused for at least one month.",
author = "Giuseppe Lazzara and Colletti, {Carmelo Giuseppe} and Serena Riela and Marina Massaro and Susanna Guernelli and {La Parola}, Valeria and Nelsi Zaccheroni and {La Parola}, Valeria",
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T1 - Gold nanoparticles stabilized by modified halloysite nanotubes for catalytic applications

AU - Lazzara, Giuseppe

AU - Colletti, Carmelo Giuseppe

AU - Riela, Serena

AU - Massaro, Marina

AU - Guernelli, Susanna

AU - La Parola, Valeria

AU - Zaccheroni, Nelsi

AU - La Parola, Valeria

PY - 2019

Y1 - 2019

N2 - A highly sustainable prototype of a flow system based on gold nanoparticles (4.2 nm) supported on thiol‐functionalized halloysite nanotubes (HNTs) was developed for catalytic applications. The catalytic performances were evaluated using the reduction of 4‐nitrophenol to 4‐aminophenol as a model system. Under the best experimental conditions (0.0001 mol%, 1.97 × 10−8 mg of Au nanoparticles), an impressive apparent turnover frequency value up to 2 204 530 h−1 was achieved and the halloysite‐based catalyst showed full recyclability even after ten cycles. The high catalytic activity confirms the importance of the use of HNTs as support for Au nanoparticles that can exert a synergistic effect both as medium for transfer of electrons from borohydride ions to 4‐nitrophenol and by modulating interfacial electron transfer dynamics. With the application of flow technology, the obtained heterogeneous HNT@Au catalyst was fully recovered and reused for at least one month.

AB - A highly sustainable prototype of a flow system based on gold nanoparticles (4.2 nm) supported on thiol‐functionalized halloysite nanotubes (HNTs) was developed for catalytic applications. The catalytic performances were evaluated using the reduction of 4‐nitrophenol to 4‐aminophenol as a model system. Under the best experimental conditions (0.0001 mol%, 1.97 × 10−8 mg of Au nanoparticles), an impressive apparent turnover frequency value up to 2 204 530 h−1 was achieved and the halloysite‐based catalyst showed full recyclability even after ten cycles. The high catalytic activity confirms the importance of the use of HNTs as support for Au nanoparticles that can exert a synergistic effect both as medium for transfer of electrons from borohydride ions to 4‐nitrophenol and by modulating interfacial electron transfer dynamics. With the application of flow technology, the obtained heterogeneous HNT@Au catalyst was fully recovered and reused for at least one month.

UR - http://hdl.handle.net/10447/346735

M3 - Article

JO - Applied Organometallic Chemistry

JF - Applied Organometallic Chemistry

SN - 0268-2605

ER -