Journal
ANALYST
Volume 135, Issue 10, Pages 2711-2716Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c0an00289e
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Funding
- DST [SR/FTP/CS-49/2006]
- CSIR, New Delhi, India [01(2098)/07/EMR-II]
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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 (NO2-) is electrocatalytically oxidized at Ag-NEEs, which leads to a sensitive determination of NO2-. The fabrication, characterization, and efficient sensing of NO2- at the Ag-NEEs are presented.
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