Ultrafine Au and Ag Nanoparticles Synthesized from Self‐Assembled Peptide Fibers and Their Excellent Catalytic Activity

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  • Wenlong Xu
    Key Laboratory of Colloid and Interface Chemistry & Key Laboratory of Special Aggregated Materials Shandong University, Ministry of Education Jinan 250100 China
  • Yue Hong
    Key Laboratory of Colloid and Interface Chemistry & Key Laboratory of Special Aggregated Materials Shandong University, Ministry of Education Jinan 250100 China
  • Yuanyuan Hu
    Key Laboratory of Colloid and Interface Chemistry & Key Laboratory of Special Aggregated Materials Shandong University, Ministry of Education Jinan 250100 China
  • Jingcheng Hao
    Key Laboratory of Colloid and Interface Chemistry & Key Laboratory of Special Aggregated Materials Shandong University, Ministry of Education Jinan 250100 China
  • Aixin Song
    Key Laboratory of Colloid and Interface Chemistry & Key Laboratory of Special Aggregated Materials Shandong University, Ministry of Education Jinan 250100 China

書誌事項

公開日
2016-04-13
権利情報
  • http://onlinelibrary.wiley.com/termsAndConditions#am
  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1002/cphc.201600182
公開者
Wiley

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説明

<jats:title>Abstract</jats:title><jats:p>The self‐assembly of an amphiphilic peptide molecule to form nanofibers facilitated by Ag<jats:sup>+</jats:sup> ions was investigated. Ultrafine AgNPs (NPs=nanoparticles) with an average size of 1.67 nm were synthesized in situ along the fibers due to the weak reducibility of the ‐SH group on the peptide molecule. By adding NaBH<jats:sub>4</jats:sub> to the peptide solution, ultrafine AgNPs and AuNPs were synthesized with an average size of 1.35 and 1.18 nm, respectively. The AuNPs, AgNPs, and AgNPs/nanofibers all exhibited excellent catalytic activity toward the reduction of 4‐nitrophenol, with turnover frequency (<jats:italic>TOF</jats:italic>) values of 720, 188, and 96 h<jats:sup>−1</jats:sup>, respectively. Three dyes were selected for catalytic degradation by the prepared nanoparticles and the nanoparticles showed selective catalysis activity toward the different dyes. It was a surprising discovery that the ultrafine AuNPs in this work had an extremely high catalytic activity toward methylene blue, with a reaction rate constant of 0.21 s<jats:sup>−1</jats:sup> and a <jats:italic>TOF</jats:italic> value of 1899 h<jats:sup>−1</jats:sup>.</jats:p>

収録刊行物

  • ChemPhysChem

    ChemPhysChem 17 (14), 2157-2163, 2016-04-13

    Wiley

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