Abstract
In this paper, we introduce a novel 60Co-ray-irradiation-based one-step synthesis method of Pt-reduced graphene oxide composites (Pt-RGO) in acid aqueous solution. The compositional distribution of the particles in the samples was characterized by transmission electron microscopy. The structure and composition of the nanocomposite has been determined with a scanning electron microscope (SEM) equipped with an energy dispersion X-ray (EDS) analyzer. Surface enhanced Raman scattering (SERS) of graphene deposited by the Pt nanoparticles were investigated with the 514.5 nm excitation. It was found that small-sized and highly-dispersed Pt nanoparticles could easily grow on the RGO surface under acidic conditions. In addition, the obtained homogeneous dispersions exhibit long-term stability, which will facilitate the production of homogeneous composites.
Kurzfassung
In der vorliegenden Arbeit wird eine neue Methode für die Synthese von Pt-reduziertem Graphenoxid (Pt-RGO) in saurer, wässriger Lösung vorgestellt. Die zusammengesetzte Verteilung der Teilchen in der Probe wurde mit Hilfe der Transmissionselektronenmikroskopie bestimmt. Struktur und Zusammensetzung der Nanoverbundwerkstoffe (Nanokomposite) wurde mit einem Rasterelektronenmikroskop, ausgestattet mit einem energiedispersiven Röntgenspektrometer bestimmt. Oberflächen-verstärkte Raman-Streuung des durch die Pt-Nanopartikel abgelagerten Graphens wurde mit Hilfe der 514,5 nm Anregung untersucht. Dabei stellte sich heraus, dass kleine und hochdispersive Pt-Nanopartikel unter sauren Bedingungen auf der RGO-Oberfläche leicht wachsen. Zusätzlich erwiesen sich die erhaltenen homogenen Dispersionen als langfristig stabil, was die Herstellung homogener Komposite erleichtern wird.
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