Mechanochemical synthesis of gold-silver nanocomposites via diazonium salts

Nemat D. AlBab, Heeyeon Nam, Changseok Han, Maria Omastova, Mohamed M. Chehimi, Ahmed A. Mohamed

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Mechanochemical synthesis of gold-silver nanocomposites from 4-ethynylaryl diazonium tetrachloroaurate(III) salt over chitosan is reported. The nanocomposites (AuAg-CTS NCs, CTS is chitosan) were synthesized by a simple grinding method using an agate mortar and pestle under ambient conditions. Four solid–solid reaction methods were used namely co-reduction, seeding, galvanic exchange, and immobilization. UV–visible data for the nanocomposites showed a peak at 445 nm. Transmission electron microscopy showed variable sizes for AuAg-CTS NCs such as 4.8 ± 0.9 nm (co-reduction), 74 ± 24 nm (seeding), 59 ± 26 nm (exchange), and 11.3 ± 7 nm (immobilization). X-ray photoelectron spectroscopy measurements supported the formation of gold and silver metals with a peak for Au4f7/2 at 84.8 eV and Ag3d5/2 at 368.2 eV.

Original languageEnglish
Article number109231
JournalInorganic Chemistry Communication
Volume137
DOIs
StatePublished - Mar 2022

Bibliographical note

Publisher Copyright:
© 2022 Elsevier B.V.

Keywords

  • Chitosan
  • Diazonium gold salt
  • Electrochemistry
  • Gold-silver
  • Mechanochemical
  • Nanocomposite

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