Silver nanoparticles as a cyanide colorimetric sensor in aqueous media

Hajizadeh, Salahaddin
Farhadi, Khalil
Forough, Mehrdad
Sabzi, Reza Emamali
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.
Citation Formats
S. Hajizadeh, K. Farhadi, M. Forough, and R. E. Sabzi, “Silver nanoparticles as a cyanide colorimetric sensor in aqueous media,” pp. 2599–2603, 2011, Accessed: 00, 2021. [Online]. Available: