Silver nanoparticles as a cyanide colorimetric sensor in aqueous media

Hajizadeh S., Farhadi K., Forough M., Sabzi R. E.

ANALYTICAL METHODS, cilt.3, sa.11, ss.2599-2603, 2011 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 3 Sayı: 11
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1039/c1ay05567d
  • Dergi Adı: ANALYTICAL METHODS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.2599-2603
  • Orta Doğu Teknik Üniversitesi Adresli: Hayır

Özet

The interaction between aqueous colloidal silver nanoparticles (AgNPs) and cyanide ions was studied using UV-Vis absorption and scanning electron microscopy (SEM) techniques. It was found that AgNPs were oxidized by dissolved oxygen in the presence of cyanide ions, resulting in a considerable decrease in the intensity of the surface plasmon resonance (SPR) absorption band of AgNPs. So, we propose a simple, cost effective, rapid, sensitive and selective colorimetric sensor for the detection of cyanide using AgNPs in aqueous media. There is a linear relationship between the absorbance intensity of AgNPs and the concentration of cyanide ions over the range of 16.7 mu mol L-1-133.3 mu mol L-1 at 394 nm. The proposed method has been successfully used for the determination of cyanide in water samples.