Electrochemical determination of nitrite using silver nanoparticles modified electrode.
In this work, we report the fabrication and characterization of silver nanoelectrode ensembles (Ag-NEEs) on a glassy carbon electrode. For this purpose, Ag nanoparticles (NPs) were anchored to the mercaptopropyl functionalized MCM-41 type silica spheres utilizing the chemisorption property of Ag NPs by -SH groups. The successful anchoring of Ag NPs into the silica matrix is characterized by several techniques including UV-vis diffuse reflectance and X-ray powder diffraction methods. The surface morphology of the Ag-NEEs was assessed by scanning and transmission electron microscopy (SEM and TEM respectively). Further, nitrite (NO(2)(-)) is electrocatalytically oxidized at Ag-NEEs, which leads to a sensitive determination of NO(2)(-). The fabrication, characterization, and efficient sensing of NO(2)(-) at the Ag-NEEs are presented.
Pal
Manas
M
Department of Chemistry, Faculty of Science, Banaras Hindu University, Varanasi, 221 005, UP, India.
Ganesan
Vellaichamy
V
D000537:Aluminum Oxide / Q000737:chemistry; D002244:Carbon / Q000737:chemistry; D055664:Electrochemical Techniques / Q000379:methods*; D004566:Electrodes; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D009573:Nitrites / Q000032:analysis*; D010084:Oxidation-Reduction; D012822:Silicon Dioxide / Q000737:chemistry; D012834:Silver / Q000737:chemistry*
C509968:MCM-41; D009573:Nitrites; D012834:Silver; D002244:Carbon; D012822:Silicon Dioxide; D000537:Aluminum Oxide