Sonochemical immobilization of noble metal nanoparticles on the surface of maghemite: Mechanism and morphological control of the products

Yoshiteru Mizukoshi, Yasuhiro Tsuru, Aki Tominaga, Satoshi Seino, Naoya Masahashi, Shuji Tanabe, Takao A. Yamamoto

研究成果: Article査読

32 被引用数 (Scopus)

抄録

Aqueous sample solutions containing noble metal ions (HAuCl4, Na2PdCl4, H2PtCl6), polyethyleneglycol monostearate, and magnetic maghemite nanoparticles were irradiated with high power ultrasound. Analyses of the products showed that noble metal ions were reduced by the effects of ultrasound, and the formed noble metal nanoparticles were uniformly immobilized on the surface of the maghemite. The present "one pot process" significantly simplifies the immobilization of noble metal nanoparticles on the surface of supports, compared with the conventional impregnation method. The average diameter of immobilized Au was 7-13 nm, and the diameters of Pd and Pt were several nm. The diameters depended upon the concentration of polyethyleneglycol monostearate and the concentration of noble metal ions, but not upon the maghemite concentration, indicating the possibility of the morphological controls of the products by adjusting these preparation conditions. The measurements of the average diameters and the numbers of immobilized Au nanoparticles obtained under various conditions suggest that the nucleation of Au does not occur on the surface of maghemite, but it might occur in the homogeneous bulk solution.

本文言語English
ページ(範囲)875-880
ページ数6
ジャーナルUltrasonics Sonochemistry
15
5
DOI
出版ステータスPublished - 2008 7月

ASJC Scopus subject areas

  • 化学工学(その他)
  • 環境化学
  • 放射線学、核医学およびイメージング
  • 音響学および超音波学
  • 有機化学
  • 無機化学

フィンガープリント

「Sonochemical immobilization of noble metal nanoparticles on the surface of maghemite: Mechanism and morphological control of the products」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル