Previous Article in event
Analysis of Radio Wave Propagation for ISM 2.4GHz Wireless Sensor Networks in Inhomogeneous Vegetation EnvironmentsPrevious Article in session
Next Article in event Next Article in session
Preparation of β-Cyclodextrin Functionalized Reduced Graphene-Silver Nanocomposites: Application for Sensing of Nitrite
Published: 02 June 2014 by MDPI in International Electronic Conference on Sensors and Applications session Chemical Sensors
Abstract: β-cyclodextrin functionalized reduced graphene-silver nanocomposites (β-CD/RGO/Ag) were successfully prepared using two step wet chemical method. The β-CD/RGO sheets were firstly synthesized via hydrazine reduction under 90°C. The Ag nanoparctiles were loaded on the β-CD/RGO sheets by reduction of AgNO3 with ammonia solution. The β-CD/RGO/Ag nanocomposites were well characterized by UV-vis spectroscopy, FTIR, FeSEM and XRD. The results confirmed that β-CD had been effectively covered on the RGO surface and the Ag nanoparticles with an average size of 100 nm were uniformly decorated on the β-CD/RGO sheets. The β-CD/RGO/Ag nanocomposites modified glassy carbon electrode was employed for selective determination of nitrite. Cyclic voltammetry measurements suggested that the β-CD/RGO/Ag exhibits excellent electrochemical activity towards nitrite due to the outstanding electronic properties of RGO sheets and host-guest recognition and enrichment capability of β-CD. The experimental conditions were investigated and optimized. Furthermore, the proposed sensor exhibits excellent anti-interference property acceptable reproducibility.
Keywords: β-cyclodextrin; Reduced graphene oxide; Silver nanocomposite; Sensor; Nitrite